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Redox‐Polymer‐Based High‐Current‐Density Gas‐Diffusion H 2 ‐Oxidation Bioanode Using [FeFe] Hydrogenase from Desulfovibrio desulfuricans in a Membrane‐free Biofuel Cell
Author(s) -
Szczesny Julian,
Birrell James A.,
Conzuelo Felipe,
Lubitz Wolfgang,
Ruff Adrian,
Schuhmann Wolfgang
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202006824
Subject(s) - hydrogenase , redox , materials science , catalysis , chemistry , chemical engineering , nanotechnology , inorganic chemistry , organic chemistry , engineering
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 2 /O 2 biofuel cell equipped with a [FeFe] hydrogenase/redox polymer‐based high‐current‐density H 2 ‐oxidation bioanode. The bioanodes show benchmark current densities of around 14 mA cm −2 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 −2 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 2 .