文献类型：期刊文献

英文题名：N-doped carbon nanocages with high catalytic activity and durability for oxygen reduction

作者：Wang, Xiao Xia[1];Zou, Biao[1];Du, Xin Xin[1];Wang, Jian Nong[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Nanomat Res Ctr, Shanghai 200237, Peoples R China

年份：2015

卷号：3

期号：23

起止页码：12427

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20152400935265);WOS:【SCI-EXPANDED(收录号:WOS:000355736700039)】；

基金：Financial support from the National Natural Science Foundation of China (project #: 51271077, U1362104) and Shanghai Nanoscience and Nanotechnology Promotion Center (project #: 12nm0503300) are greatly acknowledged.

语种：英文

外文关键词：Doping (additives) - Carbon - Chlorine compounds - Oxygen - Catalyst activity - Proton exchange membrane fuel cells (PEMFC) - Iron compounds - Heat treatment - Platinum compounds - Electrolytic reduction

摘要：The development of a carbon based non-precious metal catalyst for oxygen reduction reaction (ORR) is of paramount importance for the essential implementation of both proton exchange membrane fuel cells and metal-air batteries. In this work, we report a feasible strategy to synthesize N-doped carbon nanocages (NCNC) with high activity and durability. This is achieved by the pyrolysis of pyridine and iron carbonyl and subsequent heat treatment in the presence of NH4Cl. Based on detailed studies on the pore structure, the type and transformation of nitrogen-related functional groups, we find that the sample after heat treatment with NH4Cl has a high specific surface area up to 1093 m(2) g(-1). Also, the sample with high graphitic N doping possesses much better ORR catalytic activity than those dominated by pyridinic and pyrrolic N. The half-wave potential for the final NCNC catalyst is only 40 mV less than a commercial Pt/C catalyst at the initial stage. But the NCNC catalyst shows much better durability than the Pt/C catalyst in acidic electrolytes, and thus provides a new opportunity for Pt replacement.