Journal
BIOTECHNOLOGY AND BIOENGINEERING
Volume 110, Issue 1, Pages 173-179Publisher
WILEY
DOI: 10.1002/bit.24628
Keywords
biocathode; biofuel cells (BFCs); green alga; oxygen reduction; photoautotrophic
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Funding
- Natural Science Foundation of China [21021140001]
- Fundamental Research Funds for the Central Universities [WK2060190007]
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Biofuel cells (BFCs) use enzymes and microbial cells to produce energy from bioavailable substrates and treat various wastewaters, and cathodic oxygen reduction is a key factor governing the efficiency of BFCs. In this study, we demonstrated that a green alga, Chlamydomonas reinhardtii, could directly mediate oxygen reduction. Cyclic voltammogram analysis revealed that the C. reinhardtii biofilm formed on a solid electrode was responsible for oxygen reduction without dosing of electron mediator. Furthermore, 4-electron oxygen reduction pathway was found in this self-sustained, light-responded BFC. The results of this study could expand our understanding and viewpoints of biocathode catalysis, which is essential for novel catalyst design and development for BFCs. Biotechnol. Bioeng. 2013; 110: 173179. (C) 2012 Wiley Periodicals, Inc.
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