Chemicals and DrugsPhenomena and ProcessesDisciplines and Occupations
HydrogenationIridiumCatalysisRutheniumRhodiumStereoisomerismAlkenesPalladiumPhosphinesAlkadienesKetonesAlcoholsAlkynesMolecular StructureIminesChemistry, OrganicCyclizationAldehydesAllyl CompoundsOrganometallic CompoundsHydrogen
Homogeneous catalystsCatalytic hydrogenationCatalysisManganese dioxideAlkenesHeterogeneousEnzymesConsumed by the reactionReactantsOxidationChemical reactionSmall amountsReactionsMolecularRhodiumReaction pathwayProcessesMechanismsAlternativeCommonStepMetalActivityIncreaseProductsMadeRecoveryDevelopmentSpecificPlatinumInterests
Homogeneous catalysts1
  • Analogous events associated with substrate binding and product dissociation apply to homogeneous catalysts. (waystoworld.com)
Catalytic hydrogenation3
  • Catalysts may affect the reaction environment favorably, or bind to the reagents to polarize bonds, e.g. acid catalysts for reactions of carbonyl compounds, or form specific intermediates that are not produced naturally, such as osmate esters in osmium tetroxide-catalyzed dihydroxylation of alkenes, or cause lysis of reagents to reactive forms, such as atomic hydrogen in catalytic hydrogenation. (waystoworld.com)
  • This process is a two-step cycle, which is based on loading of hydrogen via catalytic hydrogenation into LOHCs, such as unsaturated organic compounds, followed by unloading of hydrogen via catalytic dehydrogenation after transport and storage ( 24 - 27 ). (matthey.com)
  • Interestingly, it has been reported that when dibenzyltoluene is employed as the LOHC, the hydrogen produced via electrolysis does not need to be dried before the catalytic hydrogenation reaction ( 28 ). (matthey.com)
Catalysis3
  • Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. (waystoworld.com)
  • In heterogeneous catalysis, typical secondary processes include coking where the catalyst becomes covered by polymeric side products. (waystoworld.com)
  • The most common catalyst is the hydrogen ion (H + ). Many transition metals and transition metal complexes are used in catalysis as well. (waystoworld.com)
Manganese dioxide2
  • In the presence of a catalyst such as manganese dioxide this reaction proceeds much more rapidly. (wikipedia.org)
  • This reaction is strongly affected by catalysts such as manganese dioxide, or the enzyme peroxidase in organisms. (waystoworld.com)
Alkenes1
Heterogeneous1
  • Additionally, heterogeneous catalysts can dissolve into the solution in a solid-liquid system or evaporate in a solid-gas system. (waystoworld.com)
Enzymes2
  • In living organisms, this reaction is catalyzed by enzymes (proteins that serve as catalysts) such as catalase . (wikipedia.org)
  • Catalysts called enzymes are important in biology. (waystoworld.com)
Consumed by the reaction3
  • Catalysts are not consumed by the reaction and remain unchanged after it. (wikipedia.org)
  • Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself. (waystoworld.com)
  • Although catalysts are not consumed by the reaction itself, they may be inhibited, deactivated, or destroyed by secondary processes. (waystoworld.com)
Reactants1
  • Catalysts generally react with one or more reactants to form intermediates that subsequently give the final reaction product, in the process of regenerating the catalyst. (wikipedia.org)
Oxidation1
  • An air filter that uses a low-temperature oxidation catalyst to convert carbon monoxide to less toxic carbon dioxide at room temperature. (wikipedia.org)
Chemical reaction1
  • Substances that slow a catalyst's effect in a chemical reaction are called inhibitors (or negative catalysts). (waystoworld.com)
Small amounts1
  • As a catalyst is regenerated in a reaction, often only small amounts are needed to increase the rate of the reaction. (waystoworld.com)
Reactions3
  • In general, chemical reactions occur faster in the presence of a catalyst because the catalyst provides an alternative reaction mechanism (reaction pathway) having a lower activation energy than the non-catalyzed mechanism. (wikipedia.org)
  • Martin works on the development of molecular and nanoscale catalyst materials for application in organic synthesis and hydrogen/energy storage, with a focus on selective hydrogenation and dehydrogenation reactions. (rsc.org)
  • This includes reactions in water, ionic liquids and multi-phase solvent systems. (rsc.org)
Molecular1
  • About what kind of catalyst are we even talking: Molecular, surface, nano-particles, etc. (stackexchange.com)
Rhodium2
  • The element's major use (approximately 80% of world rhodium production) is as one of the catalysts in the three-way catalytic converters in automobiles. (gsiexchange.com)
  • Other uses of rhodium include asymmetric hydrogenation used to form drug precursors and the processes for the production of acetic acid. (gsiexchange.com)
Reaction pathway1
  • A catalyst works by providing an alternative reaction pathway to the reaction product. (waystoworld.com)
Processes2
  • Another area of my research work focuses on the study of the physical processes involved, and the influence of the pore structure, on pore diffusion, the surface diffusion of molecules, the permeation of liquids, the sintering of dispersed supported metal catalysts, and the displacement of wetting by non-wetting fluids (and vice-versa). (nottingham.ac.uk)
  • A greater understanding of the transport processes and the factors that influence their rates will allow us to design more effective catalysts that are more resistant to deactivation, or improve the recovery efficiency of oil, for example. (nottingham.ac.uk)
Mechanisms2
  • In catalyzed mechanisms, the catalyst is regenerated. (wikipedia.org)
  • Furthermore, the underlying mechanisms are explored from macro-scale to micro-scale, including enhancing air stability, modulating high voltage, and stabilizing anionic redox chemistry. (bvsalud.org)
Alternative2
  • The rate increase occurs because the catalyst allows the reaction to occur by an alternative mechanism which may be much faster than the non-catalyzed mechanism. (wikipedia.org)
  • The rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst. (waystoworld.com)
Common2
Step1
Metal1
  • As this happens, there will be progressively less metal available to function as a catalyst. (stackexchange.com)
Activity3
  • The SI derived unit for measuring the catalytic activity of a catalyst is the katal , which is quantified in moles per second. (wikipedia.org)
  • The productivity of a catalyst can be described by the turnover number (or TON) and the catalytic activity by the turn over frequency (TOF), which is the TON per time unit. (wikipedia.org)
  • Substances that increase the activity of catalysts are called promoters, and substances that deactivate catalysts are called catalytic poisons. (waystoworld.com)
Increase1
  • However the non-catalyzed mechanism does remain possible, so that the total rate (catalyzed plus non-catalyzed) can only increase in the presence of the catalyst and never decrease. (wikipedia.org)
Products1
  • [6] Estimates are that 90% of all commercially produced chemical products involve catalysts at some stage in the process of their manufacture. (wikipedia.org)
Made1
  • He has published over 150 papers and has received several awards, including various lectureships, was made a Fellow of the Royal Society of Chemistry (FRSC, 2007) and Officer in the Order of the British Empire (OBE, 2017). (rsc.org)
Recovery1
  • Recycling of used platinum-rhenium catalyst and special alloys allow the recovery of another ten tons/year. (newworldencyclopedia.org)
Development1
  • My interests in EOR include the development of experimental techniques and theoretical analysis methods for structural characterisation of oil reservoir rock cores, using methods such as magnetic resonance imaging (MRI), pulsed-field gradient (PFG) NMR, mercury porosimetry, gas sorption and microscopy. (nottingham.ac.uk)
Specific1
Platinum3
Interests1
  • His research interests include Green and Sustainable Chemistry, particularly ionic liquids and renewable materials. (rsc.org)