期刊
JOURNAL OF POWER SOURCES
卷 175, 期 1, 页码 266-271出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2007.08.090
关键词
titanium dioxide nanotubes; Pd nanoparticles; supporting materials; hydrazine oxidation
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.
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