Electrodeposition of Pt-Ru nanoparticles on carbon nanotubes and their electrocatalytic properties for methanol electrooxidation

被引：219

作者：

He, ZB ^{[1
]}

Chen, JH ^{[1
]}

Liu, DY ^{[1
]}

Zhou, HH ^{[1
]}

Kuang, YF ^{[1
]}

机构：

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

来源：

基金：

中国国家自然科学基金;

关键词：

Pt-Ru nanoparticles; carbon nanotubes; methanol oxidation;

D O I：

10.1016/j.diamond.2004.03.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrochemical deposition of Pt-Ru nanoparticles on carbon nanotube electrode and their electrocatalytic properties have been investigated in this paper. Carbon nanotubes (CNTs) used in this paper are grown directly on graphite substrate by chemical vapor deposition (CVD). The Pt-Ru nanoparticles are synthesized by potentiostatic method from 0.5 M H2SO4 aqueous solutions with ruthenium chloride and chloroplatinic acid at -0.25 V The micrographs of Pt-Ru/CNT/graphite electrode are characterized by scanning electron microscopy. The electrocatalytic properties of Pt-Ru/CNT/graphite electrodes for methanol oxidation have been investigated by cyclic voltammetry in 1.0 M CH3OH+0.5 M H2SO4 aqueous solutions. The effect of ratios of Pt to Ru in the deposition bath solution on the electrocatalytical properties of Pt-Ru/CNT/graphite electrode was also investigated. The results show that the peak potential for methanol oxidation shifts to lower potential and the existing Ru can improve the stability and activity of electrode for methanol oxidation. This may be attributed to the bifunctional mechanism of Ru to Pt, which also reveals that CNTs have good potential applications as catalyst supports in direct methanol fuel cell (DMFC). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1764 / 1770

页数：7

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