TY - JOUR
T1 - Water-gas shift reaction catalyzed by redox enzymes on conducting graphite platelets
AU - Lazarus, Oliver
AU - Woolerton, Thomas W.
AU - Parkin, Alison
AU - Lukey, Michael J.
AU - Reisner, Erwin
AU - Seravalli, Javier
AU - Pierce, Elizabeth
AU - Ragsdale, Stephen W.
AU - Sargent, Frank
AU - Armstrong, Fraser A.
PY - 2009/10/14
Y1 - 2009/10/14
N2 - (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.
AB - (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.
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U2 - 10.1021/ja905797w
DO - 10.1021/ja905797w
M3 - Article
C2 - 19807170
AN - SCOPUS:70349919653
SN - 0002-7863
VL - 131
SP - 14154
EP - 14155
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 40
ER -