Hydrogen evolution catalysts. Medical search. Frequent questions

Experimental measurements of the hydrogen evolution reaction (HER), for example, have demonstrated significant electrocatalytic activity of MoS2 but there is large variation depending on preparation method. (arxiv.org)
Combining piezoelectric printing technologies with automated process controls (used to control the electrochemical reaction systems) and automated high throughput COMSOL Multiphysics simulations allows for the number of catalyst samples that can be measured in one set are increased exponentially compared to other methods capable of returning kinetic parameter data (k0eff) without sample crosstalk. (ku.edu)
For the acidic reaction conditions, peak activity of the NiMo catalyst occurred in the composition range of 78-90% Ni, whereas for the neutral reaction conditions, peak activity regions occurred at 12-18% Ni and 46-62% Ni. (ku.edu)
In the development of functional catalysts able to overcome the sluggish kinetics of the alkaline hydrogen evolution reaction (HER), MXenes emerge as attractive support candidates with distinctive hydrophilicity, high conductivity, and high (electro)chemical stability. (lincoln.ac.uk)
Herein, a phosphine (PH3) vapor-assisted phase and structure engineering strategy is developed for the controllable conversion of non-active NiTe into a heterostructured active Ni2P/NiTe2 catalyst for alkaline hydrogen evolution reaction (HER). (edu.au)
A Cobalt-Iron Double-Atom Catalyst for the Oxygen Evolution Reaction" (PDF). (wikipedia.org)
This paper describes the use of electrostatically assembled CdSe quantum dot (QD) aggregates as artificial light harvesting-reaction center units for the photocatalytic reduction of H + to H 2 , where excitons are funneled through EnT from sensitizer QDs (sQDs) to catalyst QDs (cQDs). (osti.gov)
At the optimized sensitizer-to-catalyst ratio of 4:1, the internal quantum efficiency (IQE) of the reaction system is 4.0 ± 0.3%, a factor of 13 greater than the IQE of a sample that is identical except that EnT is suppressed due to the relative core sizes of the sQDs and cQDs. (osti.gov)
Water electrolysis involves hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). (magnusgroup.org)
Simultaneously achieving abundant active sites and high intrinsic activity is a major challenge to developing highly efficient MoS x -based materials for hydrogen evolution reaction (HER) since there might be a contradictory relationship between loading amounts and intrinsic activity of amorphous molybdenum sulfide (MoS x ). (unamur.be)
Herein, we propose a novel low-cost and facile method to prepare TMD-TMC-TMO nano-hollow spheres (WS 2 -WC-WO 3 NH) as an efficient catalyst for the hydrogen evolution reaction (HER). (springeropen.com)
In a discovery that could lead to the development of novel catalysts that do not rely on expensive rare metals, scientists have shown that the optimal binding energy can deviate from traditional calculations, which are based on equilibrium thermodynamics, at high reaction rates. (sciencedaily.com)
The team performed a new set of calculations, based on reaction kinetic modeling, that take this discrepancy into account, and calculated new optimal binding energies for hydrogen oxidation, which uses heterogeneous catalysis, finding that the calculations gave different values at high reaction rates. (sciencedaily.com)
Paired with a previously reported hydrogen evolution reaction catalyst, it can achieve industrially required current density for overall seawater splitting at low voltage. (uh.edu)
Tunable e g Orbital Occupancy in Heusler Compounds for Oxygen Evolution Reaction. (mpg.de)
The photocatalytic activity of the QDs was tested by combining the QDs with Co(BF 4 ) 2 as a co‐catalyst for the proton‐reduction reaction and EtOH as an electron donor under an air stream in a photoreactor that was irradiated with simulated sunlight. (chemistryviews.org)
In addition to categorising noble metal-based catalysts, WELTEMP developed catalysts using non-noble metals, among which was a hydrogen evolution reaction (HER) catalyst. (europa.eu)
A Self-Optimizing Catalyst for the Oxygen Evolution Reaction," ACS Applied Energy Materials 3 (11), 11042-11052 (2020). (mpg.de)
Nickel-molybdenum alloy catalysts for the hydrogen evolution reaction: Activity and stability revised. (mpie.de)
The hydrogen evolution reaction (HER) is an integral electrochemical reaction in these solar to hydrogen (STH) technologies. (utexas.edu)
In work described in Energy & Environmental Science, researchers from the University of Houston, the Chinese University of Hong Kong and Central China Normal University report using a nickel/molybdenum/nitrogen compound, tweaked with a small amount of iron and grown on nickel foam to efficiently produce hydrogen and then, through a process of electrochemical reconstruction sparked by cycling voltage, converted to a compound that produced a similarly powerful oxygen evolution reaction. (nanotech-now.com)
The researchers said using a single compound for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) albeit slightly changed through the reconstruction process not only makes water splitting more affordable, it also simplifies the engineering challenges. (nanotech-now.com)
Most materials are best suited for either HER or OER, but both reactions are required to complete the chemical reaction and produce hydrogen from water. (nanotech-now.com)
Metal-based complexes have been developed which can act as catalysts for this hydrogen evolution reaction (HER). (colorado.edu)
The performance of the reported 3D Ti/TiO 2 electrocatalyst was tested for hydrogen-evolution reaction (HER) via water electrolysis. (confex.com)
This process involves running electricity through water in the presence of catalysts (reaction-enhancing substances) to yield hydrogen and oxygen. (gabio.org)
Our research is not only focused on making the new catalyst, but also on understanding the reaction mechanics behind it. (gabio.org)
We believe that our efforts will help support fundamental understanding of the water splitting reaction on the catalysts and will provide significant insights to other researchers in this field," Park said. (gabio.org)
Oxygen evolution reaction is the anodic reaction of water electrolysis, in which direct current causes a chemical reaction that splits the oxygen molecules from the water molecules. (eurekalert.org)
However, Li called this reaction "a sluggish process," and it limits water electrolysis as a sustainable mechanism to produce hydrogen gas. (eurekalert.org)
According to Li, the oxygen evolution reaction is slow because it requires a lot of power to trigger how the molecules transfer their constituents, but it could be sped up with less power if integrated with more efficient catalysts. (eurekalert.org)
Exploiting efficient electrocatalysts for the oxygen evolution reaction is paramount to the development of electrochemical devices for clean energy conversion," Li said. (eurekalert.org)
Ruthenium oxide-based nanomaterials with better oxygen evolution reaction performance in comparison to commercial products have been reported, while more sophisticated electrocatalyst design strategies to evoke more efficient catalytic performance are urgently required and largely unexplored," Li said. (eurekalert.org)
The porous and heterophase structure provides the defects - essentially nicks in the atomic structure - which enable more active sites for the oxygen evolution reaction to proceed with more efficiency, according to Li. (eurekalert.org)
Benefitting from the abundant defects, crystal boundaries and active site accessibility of the resultant samples, superior oxygen evolution reaction performance was demonstrated," Li said, explaining that the engineered electrocatalysts not only produces a better oxygen evolution reaction, but it also does with less electricity powering the process. (eurekalert.org)
Our findings not only verify the viability of a low-loading iridium-based anodic catalyst for PEMWE but also provide new ideas for modifying the oxygen exchange mechanism for high-performance oxygen evolution reaction (OER) catalyst design. (azocleantech.com)
Previous efforts were unsuccessful because a competing reaction called the hydrogen evolution reaction (HER) was dominant over the CO2 conversion reaction. (earth.com)
The predicted overall kinetics has a U onset (10 mA cm −2 ) of −0.99 V to generate CO, and the maximum turnover frequency reaches 961 h −1 per site at U = −1.18 V. The competitive hydrogen evolution reaction (HER) has a greater negative onset potential and does not interfere with the CO 2 RR. (rsc.org)
Although the pristine material exhibited moderate methane selectivity over hydrogen evolution reaction (HER), the catalytic performance is significantly enhanced (2x enhancement, 55 % CH4 at -1.25 V vs RHE) by mild thermal activation. (nist.gov)
Self-propelled micromotors have for the first time catalysed a reaction that efficiently releases pure hydrogen from a hydrogen-containing salt solution. (chemistryworld.com)
Understanding hydrogen evolution reaction (HER) behaviors over two-dimensional transition-metal dichalcogenides (2D-TMDs) is critical for the development of nonprecious HER electrocatalysts with better activity. (dtu.dk)
In comparison to transition-metal electrocatalysts, we find that the activation barrier of the Heyrovsky reaction on 2D-TMDs scales with the hydrogen adsorption energy exactly as for transition metals except that all activation energies are displaced upward by ca. 0.4 eV. (dtu.dk)
Specifically, he is working on the chemical vapour deposition (CVD) of stable 2D-based MoTe 2 films supported on high-surface area carbon-substrates as a Hydrogen Evolution Reaction (HER) Catalyst for PEM flow-cell Water Electrolysis. (gla.ac.uk)
He said: "The oxygen evolution reaction is critical to the efficiency of devices that split water to produce hydrogen fuel, but it is also a sluggish chemical reaction that lowers the overall energy conversion efficiency. (phys.org)
We show that graphene acts as a catalyst for water formation by providing the required adsorption configuration that promotes the reaction. (lu.se)

Nanostructuring is a useful strategy to improve the activity of some known hydrotreating catalysts for electrochemical hydrogen evolution. (rsc.org)
Heterostructured catalysts with unique interfaces and properties endow distinct advantages for many electrochemical reactions. (edu.au)
By using one material the iron-tweaked nickel/molybdenum/nitrogen compound for the HER and then using cycling voltage to trigger an electrochemical reconstruction to produce a slightly different material, an iron-oxide/molybdenum/nickel oxide, for the OER, researchers eliminate the need for a second catalyst while also simplifying engineering requirements, Chen said. (nanotech-now.com)
One way to produce green hydrogen is electrochemical water splitting. (gabio.org)
The electrochemical inter-conversion of oxygen, hydrogen and water molecules plays a critical role in several applications including electrolyzers and fuel cells. (aiche.org)
His aim is to discover novel, active, stable, and low-cost noble-metal free thin-film based electrocatalysts and new electrochemical routes for sustainable production of hydrogen as a fuel. (gla.ac.uk)
His research interests include understanding the electrochemical activation of dimensionally stable thin film based "Transition Metal Dichalcogenides (TMDs)" for hydrogen production. (gla.ac.uk)

Doping with 3d-metal atoms as well as Pt is found to enhance hydrogen adsorption onto the basal plane by introducing electronic states within the band gap, and in some cases (Co, Ni, Cu, Pt) significant local symmetry breaking. (arxiv.org)
Transition metal on topological chiral semimetal PdGa with tailored hydrogen adsorption and reduction. (mpg.de)
In Situ Induction of Strain in Iron Phosphide (FeP 2 ) Catalyst for Enhanced Hydroxide Adsorption and Water Oxidation. (mpg.de)
The high degree of control of internal pore composition in COFs is coupled with high CO 2 adsorption to develop heterogeneous catalysts for the conversion of CO 2 to value added products. (frontiersin.org)
We find an important dependence of simulated cell size on the calculated hydrogen adsorption energy and the activation barrier for MoS 2 . (dtu.dk)

MoS 2 on topological insulator Bi 2 Te 3 thin films: Activation of the basal plane for hydrogen reduction. (mpg.de)
Two notable examples of this catalysis are the fixation of CO 2 to epoxides for the synthesis of cyclic carbonates and the reduction of CO 2 to CO. Recent examples of COFs for the capture of CO 2 will be discussed followed by COF catalysts which use CO 2 as a feedstock for the production of value-added products. (frontiersin.org)
Direct Observation of Ni-Mo Bimetallic Catalyst Formation via Thermal Reduction of Nickel Molybdate Nanorods. (pitt.edu)
Selected topics of interest include: development of new catalysts (both noble metal and noble-metal free) for the oxygen evolution/reduction and hydrogen evolution/oxidation reactions in acid and alkaline media, novel electrolytes, novel cell architectures, and the influence cell operating conditions (temperature, pressure, etc. (aiche.org)
Herein, we demonstrate that the copper boron imidazolate cage, BIF-29(Cu) can be an ideal precursor for nitrogen coordinated single site Cu catalyst for electrocatalytic carbon dioxide reduction (CO2RR). (nist.gov)

In order to effectively study new electrocatalysts for hydrogen evolution (using water as a renewable and clean feedstock) new advancements must be made with the analytic techniques used to characterize these electrocatalysts. (ku.edu)
Here he initiated and developed a research project on molecular electrocatalysts for hydrogen evolution. (wikipedia.org)

The Sensitivity of Metal Oxide Electrocatalysis to Bulk Hydrogen Intercalation: Hydrogen Evolution on Tungsten Oxide. (pitt.edu)
In fact, when it comes to improving the electrocatalysis process that produces clean-burning hydrogen gas, it may be a very good thing. (eurekalert.org)

Enhancement of basal plane electrocatalytic hydrogen evolution activity via joint utilization of trivial and non-trivial surface states. (mpg.de)

Alkaline water electrolysis is the most promising technology for green-hydrogen production, which is considered a cornerstone of carbon-neutral energy society. (lincoln.ac.uk)
Water electrolysis for hydrogen production is very important but not efficient due to high cost of the noble metal containing catalysts or low performance of the non noble metal based catalysts. (magnusgroup.org)
HER catalysts are normally good only in acid and OER catalysts only in base, but none of them are good in both acid and base or bifunctional for both HER and OER, which makes the overall water electrolysis not efficient. (magnusgroup.org)
We recently discovered some catalysts better than the noble metal containing ones in both acid and base, which made the overall water electrolysis more efficient than the noble metal containing catalysts. (magnusgroup.org)
To boost the hydrogen economy, it is imperative to develop cost-effective and facile methodologies to synthesize NiFe-based (oxy)hydroxide catalysts for high-performance seawater electrolysis," they wrote. (uh.edu)
An EU-funded project explored the potential of water electrolysis for hydrogen production. (europa.eu)
Hydrogen fuel can be produced from traditional fossil fuels and biomass, as well as through the electrolysis of water. (europa.eu)
Although hydrogen is currently extracted from fossil fuels in central facilities, a gradual shift can now be identified towards decentralised production using water electrolysis. (europa.eu)
The technologies developed and tested by WELTEMP promise to help boost the efficiency and bring down the cost of water electrolysis for hydrogen production. (europa.eu)
Photoelectrochemical water splitting and photovoltaic electrolysis, are two processes that aim to use widely available resources like water and sunlight in providing hydrogen as a clean renewable energy for the world. (utexas.edu)
It is the catalyst material used in the proton exchange membrane (PEM) electrolysis process to produce green hydrogen if the electricity input is harnessed from green renewable energy sources. (investec.com)
As the cost of producing hydrogen continues to decline in line with the declining cost of renewable energy production and large-scale adoption of electrolysis technologies, other new applications are likely to emerge. (investec.com)
The focus of their research is electrolysis, or the process of using electricity to split water into hydrogen and oxygen. (gabio.org)
Today, the process relies on expensive noble metal components such as platinum and iridium, the preferred catalysts for producing hydrogen through electrolysis at scale. (gabio.org)
Hydrogen generation from water electrolysis - or using electric current to split water to separate hydrogen from oxygen - driven by renewable energy is a promising technology in mitigating and solving the crisis of energy and environment," said Cuiling Li, a professor at the Chinese Academy of Sciences' Technical Institute of Physics and Chemistry who is also affiliated with the Beijing Institute of Technology and the Binzhou Institute of Technology. (eurekalert.org)
"Currently it is difficult for commercial iridium oxide catalysts to achieve high activity and stability at the same time in proton exchange membrane water electrolysis (PEMWE)," said the University of Adelaide's Associate Professor Yao Zheng, ARC Future Fellow, School of Chemical Engineering. (azocleantech.com)
To improve the performance of spinel oxides, a deeper understanding of how they work as catalysts to make water electrolysis more efficient is needed. (phys.org)
A team of scientists led by Nanyang Technological University, Singapore (NTU Singapore) have discovered the parameters that determine the efficiency of a class of low-cost catalysts called spinel oxides-a discovery that breaks a bottleneck in the extraction of hydrogen from water through electrolysis, the process of splitting water with electricity. (phys.org)
A major challenge of this process lies in the energy loss as the chemical reactions involved in water electrolysis take place, driving up the cost to produce hydrogen through this method. (phys.org)
Associate Professor Xu of the NTU School of Materials Sciences and Engineering said: "To improve the performance of spinel oxides, we need a deeper understanding of how they work as catalysts to make water electrolysis more efficient. (phys.org)
Extracting hydrogen from water electrolysis, when powered by renewable energy sources such as wind or solar energy, is an attractive approach to produce hydrogen fuel , which has the potential to replace fossil fuels used in power plants, transport, and the process of bunkering. (phys.org)
The water electrolysis process takes place in an electrolyser, where two main chemical reactions take place as water is split: one results in hydrogen production , while the other leads to oxygen production, and the two gasses are kept separate by a membrane. (phys.org)

By using piezoelectric printing, precursors for metal and metal oxide catalysts are printed onto a substrate, yielding arrays of 64 catalyst samples to be analyzed by linear sweep voltammetry (LSV). (ku.edu)

This strategy could help with the design of other, similarly active catalysts. (chemistryviews.org)
Taken together, this dissertation focuses on making active catalysts either by increasing the density of active sites through chemistry or by making porous catalysts. (utexas.edu)

Oxygen and hydrogen evolution reactions on Ru, RuO 2 , Ir, and IrO 2 thin film electrodes in acidic and alkaline electrolytes: A comparative study on activity and stability. (mpie.de)
These hybrid catalysts showed superior performance for both oxygen and hydrogen (splitting). (gabio.org)
Very recently, we have initiated a project in electro catalysis using model electrodes for a fundamental understanding of the structure-activity relation during the Oxygen and Hydrogen Evolution Reactions (OER and HER) as well as the electro oxidation of hydrocarbons. (lu.se)

Determining the optimal binding energies for heterogeneous chemical reactions -- usually meaning that the reactant is in the gas or liquid phase while the catalyst is a solid -- is critical for many aspects of modern society, as we rely on such reactions for processes as diverse as the production of fertilizers and plastics. (sciencedaily.com)
According to Ryuhei Nakamura, head of the Center for Sustainable Resource Center's Biofunctional Catalyst Research Team, "Based on this finding, we plan to look for new catalysts, using elements such as copper or nickel, that can push heterogeneous catalytic reactions forward but are less costly and more environmentally friendly than the current ones, which often require precious metals such as platinum and palladium. (sciencedaily.com)
Phosphate diesters with varying ester groups may be able to tune the activity of these catalysts to fit specific reactions. (colorado.edu)
Catalysts are therefore necessary to speed up these chemical reactions. (phys.org)
Graphene can also be employed as a confining agent to study undercover reactions, a trending topic in the catalysis field due to the reported higher performance of catalysts when placed in confined environments. (lu.se)

New catalysts can simplify synthetic schemes or open up new possibilities in synthetic chemistry. (colorado.edu)

In fact, green hydrogen accounted for less than 1% of annual hydrogen production in 2020, in large part because of this expense, according to market research firm Wood Mackenzie. (gabio.org)

The produced hydrogen gas can be used as a clean, renewable fuel source that does not emit greenhouse gases or other harmful substances. (g2voptics.com)
Generating hydrogen directly from water, driven by solar light, is a renewable alternative. (chemistryviews.org)
According to the International Renewable Energy Agency (IRENA), this transition will transform the global energy sector from fossil fuels to zero-carbon energy by the second half of this century and hydrogen will play a central role within the world's new energy mix. (investec.com)
Hydrogen -especially carbon-free green hydrogen -has emerged as a promising clean energy carrier and storage option for renewable energy such as solar and wind. (gabio.org)
Researchers at Georgia Institute of Technology and Georgia Tech Research Institute (GTRI) have developed a new water-splitting process and material that maximize the efficiency of producing green hydrogen, making it an affordable and accessible option for industrial partners that want to convert to green hydrogen for renewable energy storage instead of conventional, carbon-emitting hydrogen production from natural gas. (gabio.org)
Scientists hope to replace natural gas and coal, currently used today for storing extra electric energy at the grid level, with green hydrogen because it doesn't contribute to carbon emissions, making it a more environmentally friendly means for storing renewable electricity. (gabio.org)
The race to make the widespread use of intermittent renewable energy a reality has taken a step forward with new research by experts from the University of Adelaide who are improving the efficiency of iridium-based catalysts. (azocleantech.com)
Using renewable electricity is one of the most attractive solutions to producing green hydrogen especially using the PEMWE technique, which could be operated with fast response and high current density. (azocleantech.com)

Since the titanium side was inert, the particles had an asymmetry that allowed them to move directionally, which enhanced mixing leading to rapid hydrogen evolution. (chemistryworld.com)

Jinho Park, a research scientist at GTRI and a leading investigator of the research, said this research could help lower the barrier of equipment cost used in green hydrogen production. (gabio.org)

Last summer, the Biden Administration set a goal to reduce the cost of clean hydrogen by 80% in one decade. (gabio.org)

Synergistically creating sulfur vacancies in semimetal-supported amorphous MoS 2 for efficient hydrogen evolution. (mpg.de)
image: Researchers affiliated with the Beijing Institute of Technology rationally designed an electrocatalyst with both amorphous and crystalline phases, as well as abundant defects, to more efficiently split water and produce clean-burning hydrogen gas. (eurekalert.org)

When burned or used to produce electricity, the only by-product of hydrogen is water, resulting in a clean and sustainable energy cycle. (g2voptics.com)
Dr. Bondarchuk embodies the ideals of his institution with his work on developing photoelectrodes for the large-scale production of hydrogen via photocatalytic hydrogen evolution from water. (g2voptics.com)
The Ni2P/NiTe2 catalyst shows the lowest kinetic barrier for water dissociation and the adsorbed H* can simultaneously bind to two Ni atoms at the interface of Ni2P/NiTe2(011), which greatly enhances the H* binding and HER activities. (edu.au)
In this talk, I will present a few examples on our recent discovery on new catalysts to achieve water splitting for current density larger than 500 mA/cm2 at less than 1.7 V. (magnusgroup.org)
Hydrogen has been identified as a potential replacement for sustainable and clean energy sources, since consuming hydrogen generates only water as the byproduct and the high-energy content of the H-H bond making hydrogen an efficient means of storing energy 1 , 2 . (nature.com)
A team of researchers led by Zhifeng Ren, director of the Texas Center for Superconductivity at UH, has reported an oxygen evolving catalyst that takes just minutes to grow at room temperature and is capable of efficiently producing both clean drinking water and hydrogen from seawater. (uh.edu)
Previous attempts at such bi-functional catalysts to split water into hydrogen and oxygen have generally resulted in poor performance in one of the two functions. (nanotech-now.com)
Normally, even if a catalyst works for salty water, it requires a higher energy consumption, Ren said. (nanotech-now.com)
Just as plants reduce carbon dioxide to produce sugars as fuel, we look to use the energy of the sun to reduce protons from water into hydrogen gas, which burns cleanly with no CO2 emission. (colorado.edu)
Using the X-ray, we can monitor the structural changes in the catalyst during the water-splitting process, at the nanometer scale," explained Lee. (gabio.org)
We have found that a lattice-water-assisted mechanism - a way of arranging water molecules in a specific pattern - boosts the efficiency of an iridium oxide catalyst by 5-12 per cent resulting in higher energy output while consuming less energy. (azocleantech.com)
Water splitting using PEMWE is a promising method for generating green hydrogen. (azocleantech.com)
With the lattice-water-assisted oxygen exchange mechanism that shows the possibility of both higher efficiency and stability in a proton exchange membrane water electrolyser the amount of iridium can be reduced and the cost of producing green hydrogen can be efficiently decreased. (azocleantech.com)
You can react it with water to produce energy-rich hydrogen gas, or with hydrogen to produce useful chemicals, such as hydrocarbons or alcohols. (earth.com)
These findings bring the team a step closer to making water splitting a suitable approach for large-scale manufacture of hydrogen gas, which has been highlighted by the Energy Market Authority as one possible low-carbon alternative for reducing Singapore's carbon footprint as it targets to halve its peak greenhouse gas emissions by 2050. (phys.org)

It was also shown to be active as a pre-catalyst in a three-component system for photocatalytic hydrogen generation. (colorado.edu)

In particular, the Ni-Fe bi-site not only plays a key role in the biological utilization of CO 2 in enzymes but also shows exceptional activity and selectivity for CO evolution in the heterogeneous CO 2 RR. (rsc.org)

They aim at the development of catalysts that are made of Earth-abundant elements and that enable the chemical transformations important in synthesis, energy, and sustainability. (wikipedia.org)
The different morphologies of WS 2 , such as nanosheets, nanoflowers (NFs), nanoparticles, nanotubes, and nano-hollow (NH), obtained using different synthesis methods showed different catalytic activities toward hydrogen generation. (springeropen.com)
This study demonstrates the importance of phase engineering and provides a new pathway for the design and synthesis of strategies-combined catalysts. (eurekalert.org)

The ability to produce energy in situ on location means the removal of the difficulties associated with shipping hydrogen from centralized production locations. (g2voptics.com)
Currently focusing on catalytic coatings such as Hematite (∝-Fe2O3) and Bismuth Vanadite (BiVO4) on freestanding porous Tin Oxide (SnO2) based ceramic substrates, Dr. Bondarchuk hopes to create low-cost, high-performance photoelectrodes to enable large-scale hydrogen production, harnessing the reliable and almost inexhaustible power of the sun. (g2voptics.com)
Traditionally, catalytic materials used for hydrogen production are Platinum, Palladium or other platinum group elements that are significantly rarer and thus more expensive than gold. (g2voptics.com)
Trying to scale up hydrogen production from an already substantial ~120 Million metric tonnes per year is a challenging feat, let alone shifting that amount into cleaner production methods instead of the current carbon-intensive processes we use. (g2voptics.com)
He continues, "Consequently, research to find new catalysts using our method could contribute to reaching three of the United Nations Sustainable Development Goals: Goal 7 (affordable and clean energy), Goal 12 (responsible production and consumption), and Goal 13 (climate action). (sciencedaily.com)
We develop strategies for enzyme activation, shell self-assembly, and cargo encapsulation to construct a robust nanoreactor that incorporates catalytically active [FeFe]-hydrogenases and functional partners within the empty shell for the production of hydrogen. (nature.com)
We show that shell encapsulation and the internal microenvironment of the new catalyst facilitate hydrogen production of the encapsulated oxygen-sensitive hydrogenases. (nature.com)
Among these hydrogenases, [FeFe]-hydrogenases are the most efficient enzymes for catalytic hydrogen turnover, and arguably the promising biocatalysts for hydrogen production. (nature.com)
However, traditional hydrogen production methods have a substantial carbon footprint, and cleaner methods are expensive and technically complex. (nanotech-now.com)
This work proposes a metal-based catalyst that can potentially overcome the hurdles towards industrial-scale hydrogen production including: (1) high cost of precious metals, (2) simplicity and scalability of fabrication of catalysts and electrodes, and (3) enabling large-scale, continuous hydrogen production. (confex.com)
And platinum will assume a particularly important role in the production of hydrogen as a clean energy source. (investec.com)
Important applications include the potential use of hydrogen gas instead of coke in steel production. (investec.com)
By teaming up with Toyota, BMW is hopefuly it can actually make an affordable and viable production vehicle that runs on hydrogen. (themanufacturer.com)
We've said we'll continue to invest in hydrogen and that will result in a small number of production test vehicles being made to prove the technology works," Robertson to AutoCar. (themanufacturer.com)

We designed a new class of catalyst where we came up with a better oxide substrate that uses less of the noble elements," said Lee. (gabio.org)
Previously, platinum and other noble metals have been shown to be the fastest at catalysing the release of hydrogen from sodium borohydride. (chemistryworld.com)

2210.01008] Is the doped MoS2 basal plane an efficient hydrogen evolution catalyst? (arxiv.org)
Herein, we assess the promise of three-dimensionally interconnected Ti3C2Tx MXenes with distinct surface terminations (-O, -OH, and -F) as efficient support materials for Pt-loaded alkaline HER catalysts. (lincoln.ac.uk)
As an energy vector, hydrogen is one of the most commonly touted solutions to address the pressing need for a clean and efficient fuel source to power industry, transportation, and to support a diversified electrical grid. (g2voptics.com)
This work presents a new strategy for realizing abundant active sites with high intrinsic activity for MoS x -based materials toward efficient HER from the catalyst-substrate effect. (unamur.be)
There is an optimal binding energy -- meaning the degree of interaction between the reactants and the catalyst -- where the process is most efficient (if it is too low, the reactants will not react with the catalyst, and if it is too high they will remain bound to it), and catalysts are designed based on this. (sciencedaily.com)
Zhifeng Ren, director of the Texas Center for Superconductivity at UH and a corresponding author for the paper, said the new catalyst not only allows for efficient operations with a single catalyst but also works equally well in seawater and freshwater. (nanotech-now.com)
Now, Virendra Singh and colleagues at Joseph Wang 's lab at the University of California, San Diego, US, have developed an efficient way to obtain hydrogen from a solution of sodium borohydride. (chemistryworld.com)

Hydrogen is a clean-burning fuel that is currently produced from fossil sources. (chemistryviews.org)
However, hydrogen can also decarbonise numerous other processes that currently rely on fossil fuels. (investec.com)
By the time hydrogen rivals fossil fuels, he envisions even more dynamic radar systems, high-resolution lasers, and predictive data systems reducing traffic fatalities. (themanufacturer.com)

The superior activity is further substantiated by density functional theory calculations, with the modeled Pt/Ti3C2(OH)2 unveiling a significantly higher onset potential and the weakest hydrogen binding energy over supported Pt nanoparticles (−2.51 eV) against both -O (−2.72 eV) and -F (−3.15 eV) functionalized counterparts. (lincoln.ac.uk)

However, a number of obstacles stand in the way of achieving this, with the biggest being how to deliver the hydrogen efficiently to the point of use. (europa.eu)
Now researchers are reporting a significant advance, a two-electrode catalyst that relies on one compound to efficiently produce hydrogen and oxygen from both seawater and freshwater. (nanotech-now.com)
With cheaper green hydrogen, a carbon-neutral society could be built as soon as possible, and related climate problems could be efficiently decreased. (azocleantech.com)

But existing methods require multiple steps performed at high temperatures over a lengthy period of time in order to produce a catalyst with the needed efficiency. (uh.edu)
Topological Engineering of Pt-Group-Metal-Based Chiral Crystals toward High-Efficiency Hydrogen Evolution Catalysts. (mpg.de)
To apply this technology to real applications in the future, we are currently aimed at producing this single atom catalyst in a cheap and large-scale way, while improving its performance and maintaining its efficiency," said Wang. (earth.com)
While precious metal oxides have proven to be state-of-the-art catalysts that reduce energy consumption and enhance energy conversion efficiency, their scarcity, high cost and poor durability have limited their application at large scale. (phys.org)
Based on key parameters that the team had identified, the team trained a machine learning model with a dataset of over 300 spinel oxides in order to screen and predict the efficiency of any spinel oxide catalyst in a matter of seconds. (phys.org)

Particle catalysts were synthesized by either chemically oxidizing Mo₂S₁₂²⁻ or MoS₄²⁻ precursors to make MoS₆ and MoS₄ respectively, we found higher activity for the MoS₆ materials in this work showing the influence of sulfur stoichiometry on catalyst performance Next, in a bid to control the stoichiometry and structure of a-MoS [subscript x] materials even further, we used electrochemistry to synthesize thin films of these catalysts. (utexas.edu)
To this end, we seek to simplify our catalyst precursors to produce a readily synthesized complex that can be obtained at low cost and in high yields. (colorado.edu)

Using alkaline seawater and operating under quasi-industrial conditions, the catalyst delivered a current density of 1,000 milliamps/centimeter squared using just 1.56 volts in seawater, remaining stable for 80 hours of testing. (nanotech-now.com)
Shuo Chen, associate professor of physics at UH and co-corresponding author on the paper, said the catalyst s reported strong current density at a relatively low voltage lowers the energy cost of producing hydrogen. (nanotech-now.com)

With the final goal of creating a tunable bismuth phosphate diester catalyst, this project attempted to find a simple, but effective method for synthesizing a variety of phosphate diesters, which could then be used as ligands on homogenous bismuth phosphate diester Lewis acid catalysts for a variety of different synthetic uses. (colorado.edu)

While the binding free energy of hydrogen can be tuned to be seemingly favorable for HER, the calculated activation energy turns out to be significant, at least 0.7 eV at a voltage of -0.5 V vs. SHE, indicating low catalytic activity of the doped basal plane. (arxiv.org)

In research published in the journals Applied Catalysis B: Environmental and Energy & Environmental Science , Lee and his team highlighted the interactions between metal nanoparticles and metal oxide to support design of high-performance hybrid catalysts. (gabio.org)

This means that reconsidering the design of catalysts using the new calculations may be necessary to achieve the best rates. (sciencedaily.com)
We were happy to see," says Hideshi Ooka, the first author of the study, "that our calculations predict new strategies of catalyst design which could not have been obtained using the traditional, thermodynamic approach. (sciencedaily.com)
The relationship between the structure and ORR performance of the prepared materials is studied in combination with density functional theory calculations to probe the ORR mechanism on the catalyst. (bvsalud.org)

Photocatalysis enables us to harness the energy generated by the Sun and convert it into chemical energy stored in hydrogen molecules. (g2voptics.com)

The MOF-derived nickel phosphide HER catalyst compared well to other catalysts reported in the literature and delivers current densities of 10 mA/cm² at an overpotential of 110 mV on glassy carbon substrate electrodes. (utexas.edu)

The researchers turned to ruthenium oxide, a lower cost catalyst that adheres less to reactants and intermediates than other catalysts. (eurekalert.org)

We use graphene to investigate copper oxidation undercover, revealing that its presence stabilizes a Cu 2 O phase undercover, delaying the evolution toward complete oxidation (CuO). (lu.se)
Specifically, we use graphene to investigate the coexistence of hydrogen and CO with already intercalated oxygen while following the intercalation process in situ with APXPS. (lu.se)

"As the global output of iridium is very limited, it is very important to decrease the amount used in these types of catalysts," said Associate Professor Zheng. (azocleantech.com)

Nickamine and Analogous Nickel Pincer Catalysts for Cross-Coupling of Alkyl Halides and Hydrosilylation of Alkenes" (PDF). (wikipedia.org)
Researchers from the University of Houston have reported an oxygen evolving catalyst that takes just minutes to grow at room temperature on commercially available nickel foam. (uh.edu)
Ren's research group and others have previously reported a nickel-iron-(oxy)hydroxide compound as a catalyst to split seawater, but producing the material required a lengthy process conducted at temperatures between 300 Celsius and 600 Celsius, or as high as 1,100 degrees Fahrenheit. (uh.edu)
To address both cost and stability, the researchers discovered a process to use nickel-iron-(oxy)hydroxide on nickel foam, doped with a small amount of sulfur to produce an effective catalyst at room temperature within five minutes. (uh.edu)
Using single atoms of nickel as a catalyst, the researchers achieved what scientists have been trying to accomplish for years. (earth.com)
According to the study authors, the reliability of nickel atoms as a catalyst in this conversion process is a major step toward recycling CO2 for usable energy. (earth.com)

Unlike the traditional CO 2 RR mechanism on transition metals or single-atom catalysts, the Fe-Ni dual site is firstly passivated by strongly adsorbed *CO, and the real active site of the CO 2 RR cycle is at the exposed single Fe site. (rsc.org)
Spinel oxides, which are typically made of cheap transition metals, have garnered interest in recent years as a stable, low-cost catalyst that could overcome this challenge, but the design of high-performing spinel oxides has been hampered by the lack of understanding of how they work. (phys.org)

Platinum is presently the benchmark catalyst for hydrogen evolution on PEM cathodes with the best activity efficiencies and excellent stability. (investec.com)
Using hydrogen adsorbates, we analyze the stability of different H- structures under mbar pressures of oxygen. (lu.se)

In this work, we developed a one-step surface engineering approach to fabricate highly porous self-supported S-doped Ni/Fe (oxy)hydroxide catalysts from commercial Ni foam in 1 to 5 minutes at room temperature. (uh.edu)

In this instance, sodium borohydride and hydrogen peroxide were the liquid fuel sources. (chemistryworld.com)

Effect of magnetic field on the hydrogen evolution activity using non-magnetic Weyl semimetal catalysts. (mpg.de)
Based on these insights, we discuss potential strategies for the design of nonprecious HER catalysts with activity comparable to Pt. (dtu.dk)

Here we develop and apply the principles of their evolution from systems principally for evaluating mechanism dosimetry in vitro and outline an approach for simulation of of toxicity to high-throughput systems for rapid and cost-effective nanoparticle particokinetics in cell culture systems. (cdc.gov)

Growing support from a broader spectrum of industries and governments for using hydrogen as a mainstream sustainable energy source, and the use of fuel cells beyond the transport sector could massively bolster the PGM demand over the long term," she says. (investec.com)

Predicting the Energetics of Hydrogen Intercalation in Metal Oxides Using Acid-Base Properties. (pitt.edu)

Key priorities were reducing the use of the catalyst in the system and at the same time, increasing its durability since the catalyst accounts for a major part of the equipment cost. (gabio.org)

Organisms5

Chemicals and Drugs64

Analytical, Diagnostic and Therapeutic Techniques and Equipment15

Phenomena and Processes50

Disciplines and Occupations3

Anthropology, Education, Sociology and Social Phenomena2

Technology, Industry, Agriculture3

Information Science5

Health Care3

Reaction45

Electrochemical7

Adsorption5

Reduction5

Electrocatalysts for hydrogen evolution2

Electrocatalysis2

Electrocatalytic Hydrogen Evolution1

Electrolysis22

Oxide catalysts1

Active catalysts2

Oxygen and hydrogen3

Reactions5

Chemistry1

20201

Renewable8

Rapid Hydrogen Evolution1

Green-hydrogen production1

Clean hydrogen1

Amorphous2

Water15

Photocatalytic1

Selectivity1

Synthesis3

Production14

Noble2

Efficient7

Fossil3

Binding energy1

Efficiently3

Efficiency5

Precursors2

Current density2

Homogenous1

Basal plane1

Metal oxide1

Calculations3

Molecules1

Phosphide1

Ruthenium1

Graphene2

Iridium1

Nickel6

Transition Metals2

Stability2

Porous1

Peroxide1

Activity2

Mechanism1

Sustainable1

Intercalation1

Durability1