Journal
JOURNAL OF POWER SOURCES
Volume 213, Issue -, Pages 265-269Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.04.002
Keywords
Microbial fuel cell; Graphene; Oxygen reduction reaction; Non-precious catalyst
Funding
- National Natural Science Fund of China [20977032]
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In this work, iron- and nitrogen-functionalized graphene (Fe-N-G) as a non-precious metal catalyst is synthesized via a facile method of thermal treatment of a mixture of Fe salt, graphitic carbon nitride (g-C3N4) and chemically reduced graphene. The electrocatalytic activity of the prepared catalysts toward oxygen reduction reaction (ORR) evaluated by using linear sweep voltammetry tests shows that the Fe-N-C catalyst has more positive onset potential and increased reduction current densities as compared to the pristine graphene (P-G) catalyst, indicating an enhanced ORR activity of the Fe-N-C catalyst. More importantly, the Fe-N-G-MFC achieves the highest power density of 1149.8 mW m(-2), which is similar to 2.1 times of that generated with the Pt/C-MFC (561.1 mW m(-2)) and much higher than that of the P-G-MFC (109 mW m(-2)). These results demonstrate that the Fe-N-C catalyst can hold the promise of being an excellent alternative to the costly Pt catalyst for practical MFC applications. (C) 2012 Elsevier B.V. All rights reserved.
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