文献类型：期刊文献

英文题名：Ultrasonic synthesis of nitrogen-doped carbon nanofibers as platinum catalyst support for oxygen reduction

作者：Jiang, Yue[1];Zhang, Jia[1];Qin, Yuan-Hang[1];Niu, Dong-Fang[1];Zhang, Xin-Sheng[1];Niu, Li[2];Zhou, Xing-Gui[1];Lu, Tian-Hong[2,3];Yuan, Wei-Kang[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Chang Chun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China;[3]Nanjing Normal Univ, Dept Chem, Nanjing 210097, Peoples R China

年份：2011

卷号：196

期号：22

起止页码：9356

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20113714318623);WOS:【SCI-EXPANDED(收录号:WOS:000295602400034)】；

基金：The present study was supported by the Nature Science Foundation of China (21073061), the open foundation of the State Key Laboratory of Electroanalytical Chemistry (Changchun Institute of Applied Chemistry, Chinese Academy of Sciences) and the State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University).

语种：英文

外文关键词：Carbon nanofiber; Nitrogen-doping; Oxygen reduction reaction; Electrocatalysis

摘要：Oxygen- and nitrogen-containing groups are successfully introduced onto the carbon nanofiber (CNF) surfaces by sonochemical treatment in mixed acids (concentrated sulfuric acid and nitric acid) and ammonia, respectively. Pt electrocatalysts supported on the acid-treated CNF (CNF-O) and ammonia-treated CNF (CNF-ON) are prepared and the effect of CNF surface functional groups on the electrocatalytic activities of supported catalysts for oxygen reduction reaction (ORR) is investigated. High resolution transmission electron microscopy reveals that Pt particles are uniformly dispersed on the two CNF supports and the CNF-ON supported Pt nanoparticles have a smaller average particle size and a more uniform particle size distribution. Cyclic voltammetric analysis shows the Pt/CNF-ON has a larger electrochemically active surface area than Pt/CNF-O. Rotating disk electrode measurements show that the Pt/CNF-ON exhibits a considerably higher electrocatalytic activity toward ORR as compared with Pt/CNF-O. It is believed that the good electrocatalytic activity of Pt/CNF-ON can be attributed to the smaller Pt particle size and more uniform particle size distribution, to the synergistic effect and the enhanced Pt-CNF-ON interaction, and to the unique structural and electronic properties of CNF-ON. (C) 2011 Elsevier B.V. All rights reserved.