Uniform nitrogen and sulfur co-doped carbon nanospheres as catalysts for the oxygen reduction reaction

被引：105

作者：

You, Chenghang ^{[1
]}

Liao, Shijun ^{[1
]}

Li, Hualing ^{[1
]}

Hou, Sanying ^{[1
]}

Peng, Hongliang ^{[1
]}

Zeng, Xiaoyuan ^{[1
]}

Liu, Fangfang ^{[1
]}

Zheng, Ruiping ^{[1
]}

Fu, Zhiyong ^{[1
]}

Li, Yingwei ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China

来源：

CARBON | 2014年 / 69卷

基金：

美国国家科学基金会;

关键词：

HIGH ELECTROCATALYTIC ACTIVITY; METAL-FREE ELECTROCATALYSTS; RECHARGEABLE LITHIUM BATTERIES; COMPOSITE CATHODE MATERIALS; FUEL-CELLS; EFFICIENT ELECTROCATALYST; GRAPHENE; PERFORMANCE; ARRAYS;

D O I：

10.1016/j.carbon.2013.12.028

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：

Uniform nitrogen and sulfur co-doped carbon nanospheres with an average diameter of approximately 200 nm were prepared using sulfur and polyacrylonitrile as precursors. The materials were characterized using scanning electron microscopy, transmission electron microscopy, elemental analysis, and X-ray photoelectron spectroscopy. The characterization results suggest the as-prepared materials had uniform, porous, nanospherical morphologies and high surface areas. For the typical sample containing 9.5% sulfur, the surface area is up to 653 m(2) g(-2). The catalysts exhibited enhanced catalytic activity, outstanding long-term stability, and excellent methanol tolerance in an alkaline medium. Significantly, the sulfur addition was found to be vital in improving materials' catalytic performance through preventing aggregation of the nanospheres, constructing porous structures, increasing the surface area, and participating in the formation, of active sites. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：294 / 301

页数：8

共 36 条

[1] One-step chemical reduction of graphene oxide with oligothiophene for improved electrocatalytic oxygen reduction reactions [J].