Iron- and nitrogen-functionalized graphene as a non-precious metal catalyst for enhanced oxygen reduction in an air-cathode microbial fuel cell
Iron- and nitrogen-functionalized graphene as a non-precious metal catalyst for enhanced oxygen reduction in an air-cathode microbial fuel cell
复制标题
铁和氮功能化石墨烯作为非贵金属催化剂，用于增强空气阴极微生物燃料电池中的氧还原
DOI：
10.1016/j.jpowsour.2012.04.002
复制
发表时间：
2012-09-01
影响因子：
9.2
通讯作者：
Zhang, Yaping
中科院分区：
文献类型：
--
作者：
Li, Sizhe;Hu, Yongyou;Zhang, Yaping
在这项工作中，铁和氮功能化的石墨烯（Fe-N-G）作为非贵金属催化剂，通过一种简单的方法，热处理的铁盐，石墨碳氮化物（g-C3 N4）和化学还原的石墨烯的混合物。通过使用线性扫描伏安法测试评估所制备的催化剂对氧还原反应（ORR）的电催化活性，表明与原始石墨烯（P-G）催化剂相比，Fe-N-C催化剂具有更正的起始电位和增加的还原电流密度，表明Fe-N-C催化剂的增强的ORR活性。更重要的是，Fe-N-G-MFC的最高功率密度为1149.8mW·m（-2），是Pt/C-MFC的2.1倍（561.1mW·m（-2）），远高于P-G-MFC的109 mW·m（-2）。这些结果表明，Fe-N-C催化剂可以保持作为用于实际MFC应用的昂贵Pt催化剂的优异替代物的希望。(C)2012爱思唯尔有限公司版权所有。
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.