In:
Nature Communications, Springer Science and Business Media LLC, Vol. 9, No. 1 ( 2018-11-09)
Kurzfassung:
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.
Materialart:
Online-Ressource
ISSN:
2041-1723
DOI:
10.1038/s41467-018-07137-6
Sprache:
Englisch
Verlag:
Springer Science and Business Media LLC
Publikationsdatum:
2018
ZDB Id:
2553671-0