Lazarus, O., Woolerton, T. W., Parkin, A., Lukey, M. J., Reisner, E., Seravalli, J., Pierce, E., Ragsdale, S. W., Sargent, F., Armstrong, F. A. (October 2009) Water-gas shift reaction catalyzed by redox enzymes on conducting graphite platelets. J Am Chem Soc, 131 (40). pp. 14154-5. ISSN 1520-5126
Abstract
The water-gas shift (WGS) reaction (CO + H(2)O <==> CO(2) + H(2)) is of major industrial significance in the production of H(2) 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 I) 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 conventional high-temperature catalysts.
| Item Type: | Paper |
|---|---|
| Subjects: | bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > enzymes organism description > bacteria > escherichia coli |
| CSHL Authors: | |
| Communities: | CSHL labs > Lukey lab |
| Depositing User: | Adrian Gomez |
| Date: | 14 October 2009 |
| Date Deposited: | 27 Jan 2020 17:06 |
| Last Modified: | 27 Jan 2020 17:06 |
| PMCID: | PMC4893959 |
| Related URLs: | |
| URI: | https://repository.cshl.edu/id/eprint/38934 |
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