High dispersion and electrocatalytic activity of Pd/titanium dioxide nanotubes catalysts for hydrazine oxidation

被引：90

作者：

Dong, Bin ^{[1
]}

He, Ben-Lin ^{[1
]}

Huang, Jier ^{[2
]}

Gao, Guo-Yu ^{[1
]}

Yang, Zhi ^{[1
]}

Li, Hu-Lin ^{[1
]}

机构：

[1] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China

[2] Emory Univ, Dept Chem, Atlanta, GA 30322 USA

来源：

JOURNAL OF POWER SOURCES | 2008年 / 175卷 / 01期

基金：

中国国家自然科学基金;

关键词：

titanium dioxide nanotubes; Pd nanoparticles; supporting materials; hydrazine oxidation;

D O I：

10.1016/j.jpowsour.2007.08.090

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：

Pd/titanium dioxide nanombes (Pd/TiO2-NTs) catalysts were prepared by a simple reduction method using TiO2-NTs as support. The structure and morphology of the resulting Pd/TiO2-NTs were characterized by transmission electron microscopy and X-ray diffraction. The results showed that Pd nanoparticles with a size range from 6 to 13 nm were well-dispersed on the surface of TiO2-NTs. The electrocatalytic properties of Pd/TiO2-NTs catalysts for hydrazine oxidation were also investigated by cyclic voltammetry. Compared to that of pure Pd particles and Pd/TiO2 particles, Pd/TiO2-NTs catalyst showed much higher electrochemical activity. This may be attributed to the uniform dispersion of Pd nanoparticles on TiO2-NTs, smaller particle size and unique properties of TiO2-NTs support. In addition, the mechanism of hydrazine electrochemical oxidation catalyzed by Pd/TiO2-NTs are also investigated. The oxidation of hydrazine was an irreversible process, which might be controlled by diffusion process of hydrazine. (C) 2007 Published by Elsevier B.V.

引用

页码：266 / 271

页数：6

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