Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 3, Pages 3558-3560Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.09.022
Keywords
Electrochemical treatment; Graphite; Carboxyl; Electron transfer; Microbial fuel cell
Funding
- National Science Foundation of China [20876160]
- National High Technology Research and Development Program of China (863 Program) [2007AA05Z158]
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In this paper, graphite felts were continuously electrochemically oxidized to increase the current generation in microbial fuel cells (MFCs). The treated and untreated graphite felts were utilized as anodes in MFCs and current production was compared. The current production on electrochemically treated graphite felt anodes was about 1.13 mA. 39.5% higher compared with that of MFCs containing untreated anodes. The results demonstrated that the electronic coupling between graphite felt electrodes and electrogenic bacteria could be enhanced by electrochemical oxidization of the electrodes. Further study showed that the newly generated carboxyl containing functional groups from electrochemical oxidization were responsible for the enhanced electron transfer, due to their strong hydrogen bonding with peptide bonds in bacterial cytochromes. (C) 2010 Elsevier Ltd. All rights reserved.
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