Water-gas shift reaction catalyzed by redox enzymes on conducting graphite platelets

Oliver Lazarus, Thomas W. Woolerton, Alison Parkin, Michael J. Lukey, Erwin Reisner, Javier Seravalli, Elizabeth Pierce, Stephen W. Ragsdale, Frank Sargent, Fraser A. Armstrong

    Research output: Contribution to journalArticlepeer-review

    Abstract

    (Chemical Equation Presented) The water-gas shift (WGS) reaction (CO + H2O ⇆ CO2 + H2) is of major industrial significance in the production of H2 from hydrocarbon sources. High temperatures are required, typically in excess of 200°C, using d-metal catalysts on oxide supports. In our study the WGS process is separated into two half-cell electrochemical reactions (H+ reduction and CO oxidation), catalyzed by enzymes attached to a conducting particle. The H + reduction reaction is catalyzed by a hydrogenase, Hyd-2, from Escherichia coli, and CO oxidation is catalyzed by a carbon monoxide dehydrogenase (CODH I) from Carboxydothermus hydrogenoformans. This results in a highly efficient heterogeneous catalyst with a turnover frequency, at 30°C, of at least 2.5 s-1 per minimum functional unit (a CODH/Hyd-2 pair) which is comparable to conventional high-temperature catalysts. © 2009 American Chemical Society.
    Original languageEnglish
    Pages (from-to)14154-14155
    Number of pages1
    JournalJournal of the American Chemical Society
    Volume131
    Issue number40
    DOIs
    Publication statusPublished - 14 Oct 2009

    Keywords

    • Reaction kinetics (biochem.
    • water-gas shift reaction catalyzed by redox enzymes on conducting graphite platelets)
    • Immobilization (enzyme
    • Water gas shift reaction
    • Water gas shift reaction catalysts (water-gas shift reaction catalyzed by redox enzymes on conducting graphite platelets)
    • carbon monoxide dehydrogenase hydrogenase catalyst water gas shift reaction

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