The hydrogen dependent CO 2 reductase: the first completely CO tolerant FeFe-hydrogenase

The Hydrogen Dependent Carbon dioxide Reductase (HDCR) from Acetobacterium woodii presents a promising solution to the issue of H 2 storage by reversibly coupling H 2 oxidation to CO 2 reduction. We here report on the electrocatalytic properties of the hydrogenase (Hase) module in the intact complex...

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Bibliographic Details
Published inEnergy & environmental science Vol. 10; no. 2; pp. 503 - 508
Main Authors Ceccaldi, Pierre, Schuchmann, Kai, Müller, Volker, Elliott, Sean J.
Format Journal Article
LanguageEnglish
Published 2017
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Summary:The Hydrogen Dependent Carbon dioxide Reductase (HDCR) from Acetobacterium woodii presents a promising solution to the issue of H 2 storage by reversibly coupling H 2 oxidation to CO 2 reduction. We here report on the electrocatalytic properties of the hydrogenase (Hase) module in the intact complex, including (an)aerobic oxidation, CO inhibition and the first systematic analysis of the catalytic bias (CB) of a Hase. CB depends on pH, regardless of the H 2 concentration, despite a higher affinity for H 2 than other FeFe-Hases. Remarkably, CO inhibition is fully reversible under all oxidation states of the active site, making HDCR the first “syngas-friendly” FeFe-Hase.
ISSN:1754-5692
1754-5706
DOI:10.1039/C6EE02494G