期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 73, 期 -, 页码 85-88出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2016.11.008
关键词
Formate dehydrogenase; Bioelectrocatalysis; CO2 reduction; Gas-diffusion-type electrode; Mediated electron transfer
资金
- Core Research for Evolutional Science and Technology
- Japan Science and Technology Agency
- Research Fellowships of Japan Society for the Promotion of Science for Young Scientists [16J08220]
- Grants-in-Aid for Scientific Research [16J08220] Funding Source: KAKEN
A new gas-diffusion-type biocathode was constructed for carbon dioxide (CO2) reduction. In this work, tungsten-containing formate dehydrogenase (FoDH1), which is a promising enzyme for interconversion of formate and CO2, was used as a catalyst and was absorbed on a Ketjen Black (KB)-modified electrode. We used 1,1 '-trimethylene- 2,2 '-bipyridinium dibromide as a mediator, and the hydrophobicity of the FoDH1-absorbed electrode was optimized according to the weight ratio of the polytetrafluoroethylene binder to KB. We achieved cathodic current densities of about 20 mA cm(-2) under mild and quiescent conditions (neutral pH, atmospheric pressure, and room temperature). (C) 2016 Elsevier B.V. All rights reserved.
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