文献类型：期刊文献

英文题名：Hierarchical porous iron and nitrogen co-doped carbons as efficient oxygen reduction electrocatalysts in neutral media

作者：Su, Yunhe[1];Jiang, Hongliang[1];Zhu, Yihua[1];Zou, Wenjian[1];Yang, Xiaoling[1];Chen, Jianding[1];Li, Chunzhong[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2014

卷号：265

起止页码：246

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20142217766919);WOS:【SCI-EXPANDED(收录号:WOS:000337879400034)】；

基金：This work was supported by the National Natural Science Foundation of China (21236003, 21206042, 20925621, and 21176083), the Basic Research Program of Shanghai (13NM1400700, 13NM1400701), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Hierarchical porous; Non-precious metal; Oxygen reduction reaction; Neutral media; Catalyst; Microbial fuel cell

摘要：Hierarchical porous iron and nitrogen co-doped carbons (HP-Fe-N-Cs) as efficient cathode catalysts for oxygen reduction reaction (ORR) in neutral media are reported. The HP-Fe-N-Cs are prepared by using polypyrrole as nitrogen source and poly(vinyl alcohol) (PVA) hydrogel-based composites as insitu templates. In studying the effect of the iron and the hierarchical porous structure on the nitrogendoped carbon support for ORR, we find that HP Fe N Cs show more positive onset potential, higher cathodic current density, and higher electron transfer number for the ORR in neutral media than ironfree hierarchical porous nitrogen-doped carbon (HP-N-C) and non-hierarchical porous iron and nitrogen co-doped carbon (Fe N-C), highlighting the importance of the iron and the hierarchical porous structure for improving the ORR performance. Furthermore, HP-Fe-N-Cs show better durability than the commercial Pt/C catalysts in neutral media, and the microbial fuel cells (MFCs) equipped with HP-Fe-N-Cs catalysts on cathodes exhibit comparable power outputs with those of MFCs with commercial Pt/C cathode catalysts. (c) 2014 Elsevier B.V. All rights reserved.