文献类型：期刊文献

英文题名：Hierarchical interconnected macro-/mesoporous Co-containing N-doped carbon for efficient oxygen reduction reactions

作者：Jiang, Hongliang[1];Su, Yunhe[1];Zhu, Yihua[1];Shen, Jianhua[1];Yang, Xiaoling[1];Feng, Qian[1];Li, Chunzhong[1]

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

年份：2013

卷号：1

期号：39

起止页码：12074

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20133916778511);WOS:【SCI-EXPANDED(收录号:WOS:000324553400009)】；

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), the Fundamental Research Funds for the Central Universities, and the Shanghai Leading Academic Discipline Project (project number: B502).

语种：英文

外文关键词：Oxygen - Carbon - Doping (additives) - Electrolytic reduction - Electrocatalysts - Nitrogen

摘要：Three-dimensional (3D) hierarchical porous Co-containing N-doped carbon materials (HP-Co-CNs) have been successfully prepared for the first time by using cyanamide as a nitrogen source and poly(vinyl alcohol) (PVA) hydrogel-based composites as in situ templates. Remarkably, the resulting HP-Co-CNs possess controllable nitrogen content, high surface area, hierarchical interconnected macro-/mesoporous structure, and a certain amount of Co-N-x moieties which could act as active sites in the oxygen reduction reaction (ORR). In studying the application of HP-Co-CNs for the ORR, the HP-Co-CNs showed excellent electrocatalytic performance for a four-electron ORR, and longer-term stability and higher methanol tolerance then the commercial Pt/C electrocatalyst in alkaline medium, highlighting the importance of macropores for diffusion and a sufficient amount of active sites related to high specific surface area for improving the ORR performance.