期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 60, 期 -, 页码 151-155出版社
ELSEVIER
DOI: 10.1016/j.bej.2011.10.014
关键词
Microbial fuel cell; Electrochemical oxidation; Carbon mesh; Power generation; Cyclic voltammetry; Electrode modification
资金
- NCET [08-0296]
- SRF for ROCS, SEM [2009-1001]
- China National Water Project [2008ZX07314-001]
- Natural Science Foundation of Tianjin [09JCYBJC08000]
Electrochemical oxidation as a convenient and effective method was established for anode modification to improve the performance of microbial fuel cells (MFCs). The anode modification was realized by one-step electrochemical treatment in one of the three electrolytes (nitric acid, ammonium nitrate, ammonium persulfate) at ambient temperature. The performances of MFCs before and after anode modification were compared, confirming that all these anode modifications posed positive effects. The maximum power density of the MFC with the anode modified by nitric acid was 792 mW/m(2), which was 43% larger than the unmodified control (552 mW/m(2)). Furthermore, the Coulombic efficiency (CE) significantly promoted about 71% from 14% (the unmodified MFC) to 24%. It revealed that the electrochemical oxidation resulted in the change of the anode properties, such as surface morphology, internal resistance and anode potential, and thus benefited to the microbial attachment and electron transfer on the anode surface, which might contribute to the performance improvement of the MFCs. (C) 2011 Elsevier B.V. All rights reserved.
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