Methanol electrocatalytic oxidation on highly dispersed Pt/sulfonated-carbon nanotubes catalysts

被引：106

作者：

Wang, HJ ^{[1
]}

Yu, H ^{[1
]}

Peng, F ^{[1
]}

Lv, P ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Energy Engn, Guangzhou 510641, Guangdong, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2006年 / 8卷 / 03期

关键词：

Pt catalyst; carbon nanotubes; methanol electrooxidation; electrocatalyst; nanoparticles;

D O I：

10.1016/j.elecom.2006.01.019

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Highly dispersed Pt nanoparticles supported on sulfonated carbon nanotubes (Pt/sulfonated-CNTs) with a high density of sulfonic acid groups were first prepared, and then a Pt/sulfonated-CNTs modified GC electrode was constructed successfully. The structure of Pt/sulfonated-CNTs was characterized with SEM, TEM and XRD; and the electrocatalytic performance of Pt/sulfonated-CNTs was evaluated by methanol oxidation. Various factors affecting the electrocatalytic activity were investigated and discussed. The peak current of methanol oxidation in the solution of 0.5 mol/L CH3OH and 0.5 mol/L H2SO4 can reach 0. 12 mA with the Pt deposition amount 14.5 mu g/cm(2), which is twice of Pt/pristine-CNTs/GC electrode at the same condition. The electrocatalytic oxidation of methanol on Pt/sulfonated-CNTs/GC electrode is a diffusion-controlled process. With the increase of methanol concentration, the peak current increases and anodic peak potential shifts positively. The results show that the resultant Pt/sulfonated-CNTs catalysts have high electrocatalytic activity and excellent electrocatalytic performance for the direct methanol fuel cell (DMFC). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：499 / 504

页数：6

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