High dispersion and electrocatalytic properties of platinum nanoparticles on graphitic carbon nanofibers (GCNFs)

被引：142

作者：

Tang, H ^{[1
]}

Chen, JH ^{[1
]}

Nie, LH ^{[1
]}

Liu, DY ^{[1
]}

Deng, W ^{[1
]}

Kuang, YF ^{[1
]}

Yao, SZ ^{[1
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2004年 / 269卷 / 01期

基金：

中国国家自然科学基金;

关键词：

platinum nanoparticles; carbon nanofibers; electrocatalysis; methanol oxidation;

D O I：

10.1016/S0021-9797(03)00608-8

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：

Highly dispersed platinum nanoparticles were electrodeposited on graphitic carbon nanofibers (GCNFs) by cyclic voltammetry (CV) in 7.7 mM H2PtCl6 + 0.5 M HCl aqueous solutions. The graphitic carbon nanofibers (GCNFs) used in this paper were grown directly on a graphite disk by chemical vapor deposition (CVD). The micrographs and element composition of Pt/GCNFs/graphite electrode were characterized by scanning electron microscopy (SEM) and electron diffraction spectroscopy (EDS). The electrocatalytic properties of Pt/GCNFs/graphite electrode for methanol oxidation have been investigated by CV and excellent electrocatalytic activity can be observed even at very low platinum loading (m(d) = 8.79 mug cm(-2)). The highest mass activity (MA) for methanol oxidation reaches 323 A g(-1) when Pt/GCNFs/graphite electrode was cycled at. a sweep rate of 50 mV s(-1) by CV in 2 M CH3OH + 1 M H2SO4 aqueous solutions. This may be attributed to the small particle size and high dispersion of platinum particles coated on GCNFs and shows good potential application in direct methanol fuel cell (DMFC). Additionally, the long-term cycling stability of platinum catalysts was also investigated. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：26 / 31

页数：6

共 29 条

[1] Pt/graphite nanofiber catalyst in n-hexane test reaction [J].