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

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    39 Citations (Scopus)

    Abstract

    The water-gas shift (WGS) reaction (CO + H2O reversible arrow CO2 + H-2) is of major industrial significance in the production of H, from hydrocarbon sources. High temperatures are required, typically in excess of 200 degrees 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 1) from Carboxydothermus hydrogenoformans. This results in a highly efficient heterogeneous catalyst with a turnover frequency, at 30 degrees C, of at Least 2.5 s(-1) per minimum functional unit (a CODH/Hyd-2 pair) which is comparable to,h-temperature catalysts. conventional high-temperature catalysts.

    Original languageEnglish
    Pages (from-to)14154-14155
    Number of pages2
    JournalJournal of the American Chemical Society
    Volume131
    Issue number40
    DOIs
    Publication statusPublished - 14 Oct 2009

    Keywords

    • CARBOXYDOTHERMUS-HYDROGENOFORMANS
    • CARBON-MONOXIDE
    • LIFE

    Cite this

    Lazarus, O., Woolerton, T. W., Parkin, A., Lukey, M. J., Reisner, E., Seravalli, J., Pierce, E., Ragsdale, S. W., Sargent, F., & Armstrong, F. A. (2009). Water-Gas Shift Reaction Catalyzed by Redox Enzymes on Conducting Graphite Platelets. Journal of the American Chemical Society, 131(40), 14154-14155. https://doi.org/10.1021/ja905797w