A novel TiO2 nanofiber supported PdAg catalyst for methanol electro-oxidation

A novel TiO2 nanofiber supported PdAg catalyst for methanol electro-oxidation
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一种新型 TiO2 纳米纤维负载 PdAg 甲醇电氧化催化剂

DOI:
10.1016/j.energy.2013.06.058
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发表时间:
2013-09
期刊:
影响因子:
9
通讯作者:
Donghui Wu
Donghui Wu
中科院分区:
工程技术1区
文献类型:
--
作者:
Jianfeng Ju;Xi Chen;Yijun Shi;Donghui Wu

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以TiO 2为载体,制备了一种新型的甲醇氧化PdAg/TiO 2/SiO2电催化剂。采用X射线衍射(XRD)、透射电子显微镜(TEM)和电化学分析等手段对催化剂的结构和电化学性能进行了表征。实验结果表明,TiO 2纳米粒子的大比表面积和多孔结构有利于纳米PdAg合金在TiO 2纳米粒子载体表面的分散。PdAg/TiO 2纳米粒子催化剂对甲醇氧化的电催化活性显示出良好的电催化和抗中毒能力。PdAg/TiO 2纳米复合材料的甲醇氧化机理主要是由于复合TiO 2材料的光催化作用,在没有紫外光照射的情况下具有较高的催化活性。PdAg/TiO 2催化剂有望成为直接甲醇燃料电池的候选催化剂。
A novel PdAg/TiO2nanofiber electrocatalyst for methanol oxidation was fabricated by using TiO2nanofiber as support. The structural and electrochemical properties of the PdAg/TiO2nanofiber catalyst were characterized by XRD (X-ray diffraction), TEM (the transmission electron microscopy) and electrochemical analysis. The experiment results showed that the large surface area and porous structure of TiO2nanofiber were preferable to the dispersion of nanosized PdAg alloy on the surface of TiO2nanofiber support. The electrocatalytic activity for methanol oxidation of the PdAg/TiO2nanofiber catalyst has shown promising electrocatalytic and anti-poisoning capabilities. The methanol oxidation mechanism of the PdAg/TiO2nanofiber catalyst was mainly resulted from the photocatalytic function of the composite TiO2material that had high catalytic activity without UV light illumination. The PdAg/TiO2catalyst might become a promising candidate for direct methanol fuel cell.
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