A gas breathing hydrogen/air biofuel cell comprising a redox polymer/hydrogenase-based bioanode

Julian Szczesny; Nikola Marković; Felipe Conzuelo; Sónia Zacarias; Inês A.C. Pereira; Wolfgang Lubitz; Nicolas Plumeré; Wolfgang Schuhmann; Adrian Ruff

doi:10.1038/s41467-018-07137-6

A gas breathing hydrogen/air biofuel cell comprising a redox polymer/hydrogenase-based bioanode

Julian Szczesny, Nikola Marković, Felipe Conzuelo, Sónia Zacarias, Inês A.C. Pereira, Wolfgang Lubitz, Nicolas Plumeré, Wolfgang Schuhmann, Adrian Ruff

Research output: Contribution to journal › Article › peer-review

65 Scopus citations

Abstract

Hydrogen is one of the most promising alternatives for fossil fuels. However, the power output of hydrogen/oxygen fuel cells is often restricted by mass transport limitations of the substrate. Here, we present a dual-gas breathing H ₂ /air biofuel cell that overcomes these limitations. The cell is equipped with a hydrogen-oxidizing redox polymer/hydrogenase gas-breathing bioanode and an oxygen-reducing bilirubin oxidase gas-breathing biocathode (operated in a direct electron transfer regime). The bioanode consists of a two layer system with a redox polymer-based adhesion layer and an active, redox polymer/hydrogenase top layer. The redox polymers protect the biocatalyst from high potentials and oxygen damage. The bioanodes show remarkable current densities of up to 8 mA cm ^-2 . A maximum power density of 3.6 mW cm ^-2 at 0.7 V and an open circuit voltage of up to 1.13 V were achieved in biofuel cell tests, representing outstanding values for a device that is based on a redox polymer-based hydrogenase bioanode.

Original language	English
Article number	4715
Journal	Nature Communications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41467-018-07137-6
State	Published - 1 Dec 2018
Externally published	Yes

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title = "A gas breathing hydrogen/air biofuel cell comprising a redox polymer/hydrogenase-based bioanode",

abstract = " Hydrogen is one of the most promising alternatives for fossil fuels. However, the power output of hydrogen/oxygen fuel cells is often restricted by mass transport limitations of the substrate. Here, we present a dual-gas breathing H 2 /air biofuel cell that overcomes these limitations. The cell is equipped with a hydrogen-oxidizing redox polymer/hydrogenase gas-breathing bioanode and an oxygen-reducing bilirubin oxidase gas-breathing biocathode (operated in a direct electron transfer regime). The bioanode consists of a two layer system with a redox polymer-based adhesion layer and an active, redox polymer/hydrogenase top layer. The redox polymers protect the biocatalyst from high potentials and oxygen damage. The bioanodes show remarkable current densities of up to 8 mA cm -2 . A maximum power density of 3.6 mW cm -2 at 0.7 V and an open circuit voltage of up to 1.13 V were achieved in biofuel cell tests, representing outstanding values for a device that is based on a redox polymer-based hydrogenase bioanode.",

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AU - Conzuelo, Felipe

AU - Zacarias, Sónia

AU - Pereira, Inês A.C.

AU - Lubitz, Wolfgang

AU - Plumeré, Nicolas

AU - Schuhmann, Wolfgang

AU - Ruff, Adrian

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N2 - Hydrogen is one of the most promising alternatives for fossil fuels. However, the power output of hydrogen/oxygen fuel cells is often restricted by mass transport limitations of the substrate. Here, we present a dual-gas breathing H 2 /air biofuel cell that overcomes these limitations. The cell is equipped with a hydrogen-oxidizing redox polymer/hydrogenase gas-breathing bioanode and an oxygen-reducing bilirubin oxidase gas-breathing biocathode (operated in a direct electron transfer regime). The bioanode consists of a two layer system with a redox polymer-based adhesion layer and an active, redox polymer/hydrogenase top layer. The redox polymers protect the biocatalyst from high potentials and oxygen damage. The bioanodes show remarkable current densities of up to 8 mA cm -2 . A maximum power density of 3.6 mW cm -2 at 0.7 V and an open circuit voltage of up to 1.13 V were achieved in biofuel cell tests, representing outstanding values for a device that is based on a redox polymer-based hydrogenase bioanode.

AB - Hydrogen is one of the most promising alternatives for fossil fuels. However, the power output of hydrogen/oxygen fuel cells is often restricted by mass transport limitations of the substrate. Here, we present a dual-gas breathing H 2 /air biofuel cell that overcomes these limitations. The cell is equipped with a hydrogen-oxidizing redox polymer/hydrogenase gas-breathing bioanode and an oxygen-reducing bilirubin oxidase gas-breathing biocathode (operated in a direct electron transfer regime). The bioanode consists of a two layer system with a redox polymer-based adhesion layer and an active, redox polymer/hydrogenase top layer. The redox polymers protect the biocatalyst from high potentials and oxygen damage. The bioanodes show remarkable current densities of up to 8 mA cm -2 . A maximum power density of 3.6 mW cm -2 at 0.7 V and an open circuit voltage of up to 1.13 V were achieved in biofuel cell tests, representing outstanding values for a device that is based on a redox polymer-based hydrogenase bioanode.

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A gas breathing hydrogen/air biofuel cell comprising a redox polymer/hydrogenase-based bioanode

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