Redox-Polymer-Based High-Current-Density Gas-Diffusion H 2 -Oxidation Bioanode Using [FeFe] Hydrogenase from Desulfovibrio desulfuricans in a Membrane-free Biofuel Cell.

Authors :: Szczesny J
Birrell JA
Conzuelo F
Lubitz W
Ruff A
Schuhmann W
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2020 Sep 14; Vol. 59 (38), pp. 16506-16510. Date of Electronic Publication: 2020 Jul 21.
Publication Year :: 2020
Abstract: The incorporation of highly active but also highly sensitive catalysts (e.g. the [FeFe] hydrogenase from Desulfovibrio desulfuricans) in biofuel cells is still one of the major challenges in sustainable energy conversion. We report the fabrication of a dual-gas diffusion electrode H <subscript>2</subscript> /O <subscript>2</subscript> biofuel cell equipped with a [FeFe] hydrogenase/redox polymer-based high-current-density H <subscript>2</subscript> -oxidation bioanode. The bioanodes show benchmark current densities of around 14 mA cm <superscript>-2</superscript> and the corresponding fuel cell tests exhibit a benchmark for a hydrogenase/redox polymer-based biofuel cell with outstanding power densities of 5.4 mW cm <superscript>-2</superscript> at 0.7 V cell voltage. Furthermore, the highly sensitive [FeFe] hydrogenase is protected against oxygen damage by the redox polymer and can function under 5 % O <subscript>2</subscript> .<br /> (© 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.)

Subjects :: Bioelectric Energy Sources
Desulfovibrio desulfuricans chemistry
Desulfovibrio desulfuricans enzymology
Diffusion
Electrodes
Hydrogen chemistry
Hydrogenase chemistry
Molecular Structure
Oxidation-Reduction
Oxygen chemistry
Polymers chemistry
Biofuels
Desulfovibrio desulfuricans metabolism
Hydrogen metabolism
Hydrogenase metabolism
Oxygen metabolism
Polymers metabolism

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