Iron- and nitrogen-functionalized graphene as a non-precious metal catalyst for enhanced oxygen reduction in an air-cathode microbial fuel cell

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• 作者：Sizhe Li^a ; ^b ; ¹ ; ^{scutlsz@gmail.com} ; Yongyou Hu^a ; ^b ; ^{ppyyhu@scut.edu.cn} ; Qian Xu^a ; ^b ; ² ; ^{fenglingxq@gmail.com} ; Jian Sun^a ; ^b ; ³ ; ^{sunjian472@163.com} ; Bin Hou^a ; ^b ; ⁴ ; ^{houbin566@163.com} ; Yaping Zhang^a ; ^b ; ⁵ ; ^{zhang.yp@mail.scut.edu.cn}
• 关键词：Microbial fuel cell ; Graphene ; Oxygen reduction reaction ; Non-precious catalyst
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：1 September, 2012
• 卷：213
• 期：Complete
• 页码：265-269
• 文件大小：804 K

摘要

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-G 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-G catalyst. More importantly, the Fe-N-G-MFC achieves the highest power density of 1149.8 mW m^鈭?, which is 鈭?.1 times of that generated with the Pt/C-MFC (561.1 mW m^鈭?) and much higher than that of the P-G-MFC (109 mW m^鈭?). These results demonstrate that the Fe-N-G catalyst can hold the promise of being an excellent alternative to the costly Pt catalyst for practical MFC applications.