文献类型：期刊文献

英文题名：Platinum/carbon nanofiber nanocomposite synthesized by electrophoretic deposition as electrocatalyst for oxygen reduction

作者：Zheng, Jun-Sheng[1];Wang, Ming-Xia[1];Zhang, Xin-Sheng[1];Wu, Yun-Xia[1];Li, Ping[1];Zhou, Xing-Gui[1];Yuan, Wei-Kang[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, UNILAB, Shanghai 200237, Peoples R China

年份：2008

卷号：175

期号：1

起止页码：211

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20074810950981);WOS:【SCI-EXPANDED(收录号:WOS:000252513100026)】；

语种：英文

外文关键词：carbon nanofiber; electrophoretic deposition; oxygen reduction reaction; electrocatalytic properties

摘要：A platinum/carbon nanofiber (Pt/CNF) nanocomposite with a platinum loading of 15 wt% is prepared by a modified electrophoretic deposition (EPD) method, and the as-grown nanocomposite is used as the electrocatalyst for oxygen reduction reaction (ORR). For comparison, a Pt/CNF composite with 40 wt% platinum loading is prepared by chemical reduction. High resolution transmission electron microscope (HRTEM) images show that the size of platinum nanoparticles formed by EPD is about 1 nm, much smaller than those by chemical reduction (about 3-5 nm). Cyclic voltammetric analysis in a nitrogen saturated electrolyte shows that the electrochemical surface area of electrocatalyst by EPD is larger than that by chemical reduction. Moreover, although the electrocatalyst prepared by chemical reduction has a higher electrochemical capacity, it is less active than that prepared by EPD. Analysis of the electrode kinetics using Tafel plot suggests that the electrocatalyst prepared by EPD provides a strong ORR activity. Cyclic voltammetric measurements at different scan rates confirm that the ORR on the nanocomposites prepared by EPD is a diffusion-controlled process. This work demonstrates that the Pt/CNF composites synthesized by EPD are effective for ORR. (C) 2007 Elsevier B.V. All rights reserved.