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Issue 2, 2014
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FeFe hydrogenase reductive inactivation and implication for catalysis

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Abstract

We show that FeFe hydrogenases inactivate at low potential, in a complex process that is mostly reversible. A form of the enzyme that is produced slowly and reversibly under reductive conditions has no proton activity under reductive conditions, although it can still oxidize H2 under oxidative conditions. This suggests that the so-called “super-reduced” state of the active site H-cluster is not part of the normal catalytic cycle. We also discuss our findings in relation to the optimization of H2-photoproduction devices based on FeFe hydrogenases that receive electrons from low potential photosensitizers.

Graphical abstract: FeFe hydrogenase reductive inactivation and implication for catalysis

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Publication details

The article was received on 20 Jun 2013, accepted on 04 Nov 2013 and first published on 06 Nov 2013


Article type: Paper
DOI: 10.1039/C3EE42075B
Citation: Energy Environ. Sci., 2014,7, 715-719
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    FeFe hydrogenase reductive inactivation and implication for catalysis

    V. Hajj, C. Baffert, K. Sybirna, I. Meynial-Salles, P. Soucaille, H. Bottin, V. Fourmond and C. Léger, Energy Environ. Sci., 2014, 7, 715
    DOI: 10.1039/C3EE42075B

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