Direct comparison of the electrocatalytic oxidation of hydrogen by an enzyme and a platinum catalyst.
It is shown that for molecules of Allochromatium vinosum [NiFe]-hydrogenase adsorbed on a pyrolytic graphite electrode the nickel-iron active site catalyzes hydrogen oxidation at a diffusion-controlled rate matching that achieved by platinum.
Department of Chemistry, Oxford University, Oxford, UK OX1 3QR.
Anne K
AK
Jones
Emma
E
Sillery
Simon P J
SP
Albracht
Fraser A
FA
Armstrong
D002384:Catalysis; D002844:Chromatium / Q000201:enzymology* / Q000254:growth & development; D004058:Diffusion; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D004579:Electron Transport; D006108:Graphite / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D006864:Hydrogenase / Q000737:chemistry*; D010084:Oxidation-Reduction; D010984:Platinum / Q000737:chemistry*; D013379:Substrate Specificity
D010984:Platinum; D006108:Graphite; D006859:Hydrogen; C043296:nickel-iron hydrogenase; D006864:Hydrogenase