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首页> 外文期刊>Journal of power sources >High dispersion and electrocatalytic activity of Pd/titanium dioxide nanotubes catalysts for hydrazine oxidation
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High dispersion and electrocatalytic activity of Pd/titanium dioxide nanotubes catalysts for hydrazine oxidation

机译：Pd /二氧化钛纳米管催化剂的高分散性和电催化活性

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摘要

Pd/titanium dioxide nanotubes (Pd/TiO_2-NTs) catalysts were prepared by a simple reduction method using TiO_2-NTs as support. The structure and morphology of the resulting Pd/TiO_2-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 TiO_2-NTs. The electrocatalytic properties of Pd/TiO_2-NTs catalysts for hydrazine oxidation were also investigated by cyclic voltammetry. Compared to that of pure Pd particles and Pd/TiO_2 particles, Pd/TiO_2-NTs catalyst showed much higher electrochemical activity. This may be attributed to the uniform dispersion of Pd nanoparticles on TiO_2-NTs, smaller particle size and unique properties of TiO_2-NTs support. In addition, the mechanism of hydrazine electrochemical oxidation catalyzed by Pd/TiO_2-NTs are also investigated. The oxidation of hydrazine was an irreversible process, which might be controlled by diffusion process of hydrazine.
机译：采用简单的还原法，以TiO_2-NTs为载体，制备了Pd / TiO2纳米管（Pd / TiO_2-NTs）催化剂。通过透射电子显微镜和X射线衍射表征了所得Pd / TiO_2-NTs的结构和形态。结果表明，粒径为6〜13nm的Pd纳米颗粒均匀分散在TiO_2-NTs表面。还通过循环伏安法研究了Pd / TiO_2-NTs催化剂对肼氧化的电催化性能。与纯Pd颗粒和Pd / TiO_2颗粒相比，Pd / TiO_2-NTs催化剂具有更高的电化学活性。这可能归因于Pd纳米颗粒在TiO_2-NTs上的均匀分散，更小的粒径和TiO_2-NTs载体的独特性能。此外，还研究了Pd / TiO_2-NTs催化肼电化学氧化的机理。肼的氧化是不可逆的过程，可能受肼的扩散过程控制。

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