文献类型：期刊文献

英文题名：Effect of carbon nanofiber surface groups on oxygen reduction reaction of supported Pt electrocatalyst

作者：Zhong, Ren-Sheng[1];Qin, Yuan-Hang[1];Niu, Dong-Fang[1];Zhang, Xin-Sheng[1];Zhou, Xin-Gui[1];Sun, Shi-Gang[2];Yuan, Wei-Kang[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

年份：2013

卷号：89

起止页码：157

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20131016078798);WOS:【SCI-EXPANDED(收录号:WOS:000315558200021)】；

基金：The present study was supported by the Nature Science Foundation of China (21073061), the State Key Laboratory of Physical Chemistry of Solid surfaces (Xiamen University), the State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology (Zhejiang University of Technology), and the 111 Project (B08021). The authors are also very thankful to Jing-Wei Tian, the student of Prof. Xin-Sheng Zhang, who helped with the RDE studies.

语种：英文

外文关键词：Carbon nanofiber; Pt nanoparticle; Oxygen reduction reaction; Surface group

摘要：Pt nanoparticles supported on the acid-treated carbon nanofiber (CNF-OX) and LiAlH4-treated carbon nanofiber (CNF-OH) are synthesized via ethylene glycol reduction method. The nature of oxygen-containing surface groups on the CNF-OX and CNF-OH is investigated by potentiometric titration and XPS characterization. Titration of the support materials shows that LiAlH4 can effectively convert the carboxylic acid groups (from 0.21 mmol g(-1) to 0.06 mmol g(-1)) to hydroxyl groups (from 0.09 mmol g(-1) to 0.17 mmol g(-1)), which is agreed well with the results of XPS characterization. High resolution transmission electron microscopy (HRTEM) characterization shows that the Pt nanoparticles are highly dispersed on the two modified CNFs, and the Pt nanoparticles supported on the CNF-OH have a smaller particle size and a more uniform particle size distribution. Rotating disk electrode (RDE) analysis reveals that Pt/CNF-OH exhibits a better activity for ORR than Pt/CNF-OX, and this may be associated with the smaller particle size and better dispersion of Pt nanoparticles on the CNF-OH. (C) 2012 Elsevier Ltd. All rights reserved.