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

被引：60

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

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 39期

基金：

中国国家自然科学基金;

关键词：

METAL-FREE ELECTROCATALYSTS; CATALYST-FREE SYNTHESIS; CHEMICAL-REDUCTION; FACILE SYNTHESIS; GRAPHITE OXIDE; GRAPHENE OXIDE; NANOPARTICLES; GROWTH; NANOTUBES; COMPOSITE;

D O I：

10.1039/c3ta12493b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页码：12074 / 12081

页数：8

共 57 条

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