A fully protected hydrogenase/polymer-based bioanode for high-performance hydrogen/glucose biofuel cells

Hydrogenases with Ni- and/or Fe-based active sites are highly active hydrogen oxidation catalysts with activities similar to those of noble metal catalysts. However, the activity is connected to a sensitivity towards high-potential deactivation and oxygen damage. Here we report a fully protected pol...

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Bibliographic Details
Main Author: Ruff, Adrian (author)
Other Authors: Szczesny, Julian (author), Marković, Nikola (author), Conzuelo, Felipe (author), Zacarias, Sónia (author), Pereira, Inês A.C. (author), Lubitz, Wolfgang (author), Schuhmann, Wolfgang (author)
Format: article
Language:eng
Published: 2019
Subjects:
Chemistry(all)
Biochemistry, Genetics and Molecular Biology(all)
Physics and Astronomy(all)
Online Access:https://doi.org/10.1038/s41467-018-06106-3
Country:Portugal
Oai:oai:run.unl.pt:10362/68551
Description
Summary:Hydrogenases with Ni- and/or Fe-based active sites are highly active hydrogen oxidation catalysts with activities similar to those of noble metal catalysts. However, the activity is connected to a sensitivity towards high-potential deactivation and oxygen damage. Here we report a fully protected polymer multilayer/hydrogenase-based bioanode in which the sensitive hydrogen oxidation catalyst is protected from high-potential deactivation and from oxygen damage by using a polymer multilayer architecture. The active catalyst is embedded in a low-potential polymer (protection from high-potential deactivation) and covered with a polymer-supported bienzymatic oxygen removal system. In contrast to previously reported polymer-based protection systems, the proposed strategy fully decouples the hydrogenase reaction form the protection process. Incorporation of the bioanode into a hydrogen/glucose biofuel cell provides a benchmark open circuit voltage of 1.15 V and power densities of up to 530 µW cm−2 at 0.85 V.

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