Electrocatalytic oxidation of methanolon carbon-nanotubes/graphite electrode modified with platinumand molybdenum oxide nanoparticles

来源期刊：中国有色金属学报(英文版)2007年第1期

论文作者：甘永平 黄辉 张文魁

文章页码：214 - 214

Key words：methanol oxidation; carbon nanotubes; molybdenum oxides; nanoparticles; fuel cells

Abstract: Electrochemical codeposition and electrocatalytic properties of platinum and molybdenum oxide nanoparticles (Pt-MoO_x) on carbon-nanotubes/graphite electrode for methanol oxidation were investigated. The micrograph and elemental composition of the resulting Pt-MoO_x/CNTs/graphite electrode were characterized by scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS). The results show that the Pt-MoO_x particles with the average size of about 50 nm are highly dispersed on the CNTs surface. The Pt-MoO_x/CNTs/graphite electrode delivers excellent electrocatalytic properties for methanol oxidation. The highest mass activity(A_m) reaches 264.8 A/g at the loading mass of 159.3 mg/cm². This may be attributed to the small particle size and high dispersion of Pt-MoO_x catalysts deposited on the CNTs surface. The kinetic analysis from electrochemical impedance spectroscopy(EIS) reveals that the existed MoO_x phase can improve the chemisorptive and catalytic properties for methanol oxidation.

基金信息：the National Natural Science Foundation of China