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Redox-Polymer-Based High-Current-Density Gas-Diffusion H-2-Oxidation Bioanode Using [FeFe] Hydrogenase fromDesulfovibrio desulfuricansin a Membrane-free Biofuel Cell

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Birrell,  James A.
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

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Citation

Szczesny, J., Birrell, J. A., Conzuelo, F., Lubitz, W., Ruff, A., & Schuhmann, W. (2020). Redox-Polymer-Based High-Current-Density Gas-Diffusion H-2-Oxidation Bioanode Using [FeFe] Hydrogenase fromDesulfovibrio desulfuricansin a Membrane-free Biofuel Cell. Angewandte Chemie, International Edition in English, 59(38), 16506-16510. doi:10.1002/anie.202006824.


Cite as: http://hdl.handle.net/21.11116/0000-0007-D4E2-A
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-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.