Improvement of a direct electron transfer-type fructose/dioxygen biofuel cell with a substrate-modified biocathode

The fructose/dioxygen biofuel cell, one of the direct electron transfer (DET)-type bioelectrochemical devices, utilizes fructose dehydrogenase (FDH) on the anode and multi-copper oxidase such as bilirubin oxidase (BOD) on the cathode as catalysts. The power density in the literature is limited by th...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2014-03, Vol.16 (10), p.4823-4829
Main Authors: So, Keisei, Kawai, Shota, Hamano, Yasuyuki, Kitazumi, Yuki, Shirai, Osamu, Hibi, Makoto, Ogawa, Jun, Kano, Kenji
Format: Article
Language:English
Subjects:
Adsorption
Bacteria - enzymology
Bioelectric Energy Sources - microbiology
Carbohydrate Dehydrogenases - metabolism
Carbon
Density
Electrodes
Electron Transport
Equipment Design
Fructose
Fructose - metabolism
Fuels
Oxidase
Oxidoreductases Acting on CH-CH Group Donors - metabolism
Oxygen - metabolism
Surface chemistry
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Summary:The fructose/dioxygen biofuel cell, one of the direct electron transfer (DET)-type bioelectrochemical devices, utilizes fructose dehydrogenase (FDH) on the anode and multi-copper oxidase such as bilirubin oxidase (BOD) on the cathode as catalysts. The power density in the literature is limited by the biocathode performance. We show that the DET-type biocathode performance is greatly improved, when bilirubin or some related substances are adsorbed on electrodes before the BOD adsorption. Several data show that the substrate modification induces the appropriate orientation of BOD on the electrode surface for the DET. The substrate-modification method has successfully been applied to air-breathing gas-diffusion-type biocathodes. We have also optimized the conditions of the FDH adsorption on carbon cryogel electrodes. Finally, a one-compartment DET-type biofuel cell without separators has been constructed, and the maximum power density of 2.6 mW cm(-2) was achieved at 0.46 V of cell voltage under quiescent (passive) and air atmospheric conditions.
ISSN:1463-9076
1463-9084
DOI:10.1039/c3cp54888k