介孔碳化钨负载铂催化剂对甲醇氧化的电催化性能

doi:10.3724/SP.J.1077.2013.13190

无机材料学报 ›› 2013, Vol. 28 ›› Issue (12): 1286-1290.DOI: 10.3724/SP.J.1077.2013.13190 CSTR: 32189.14.SP.J.1077.2013.13190

介孔碳化钨负载铂催化剂对甲醇氧化的电催化性能

胡仙超¹, 胡建冠², 孙洁², 李国华²

(浙江工业大学 1. 分析测试中心, 2.?化学工程与材料学院, 杭州 310032)

收稿日期:2013-04-03 修回日期:2013-07-01 出版日期:2013-12-20 网络出版日期:2013-11-15
作者简介:胡仙超(1981–), 男, 博士, 助理研究员. E-mail: huxc@zjut.edu.cn
基金资助:
国家自然科学基金(21173193); 浙江省教育厅科研项目(Y201225711) ; 浙江省科技计划项目(2013C37104)

Mesoporous Tungsten Carbide Supported Pt and Their Electro Catalytic Activity for Methanol Electro-oxidation

HU Xian-Chao¹, HU Jian-Guan², SUN Jie², LI Guo-Hua²

(1. Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, China; 2. College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China)

Received:2013-04-03 Revised:2013-07-01 Published:2013-12-20 Online:2013-11-15
About author:HU Xian-Chao. E-mail: huxc@zjut.edu.cn
Supported by:
National Natural Science Foundation of China (21173193); Ministry of Education Foundation of Zhejiang Provice (Y201225711); Science and Technology Project of Zhejiang Province(2013C37104)

摘要/Abstract

摘要： 采用硬模板法制备了介孔碳化钨(m-WC), 进一步还原铂的前驱体(H2PtCl6)得到Pt/m-WC催化剂。采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)等测试手段对样品的物相、结构和形貌进行了表征。结果表明, 所制得的m-WC载体为单一的碳化钨相, 孔径为10~20 nm, Pt/m-WC催化剂中Pt的粒径约为3.4 nm, 主要以金属态形式存在, 相对比较均一的Pt纳米粒子均匀地分散在载体的表面和孔道中。电化学测试结果表明, 与普通WC载Pt催化剂(Pt/c-WC)相比, Pt/m-WC催化剂具有较大的电化学活性表面积, 对甲醇呈现出更高的电催化氧化活性和更好的稳定性。

关键词: 直接甲醇燃料电池, 碳化钨, 介孔材料, 电催化

Abstract: Mesoporous tungsten carbide supported Pt nanoparticles (Pt/m-WC) with uniform size were prepared using hard template method and H2PtCl6 as the Pt precursor. The crystal phase, structure and morphology of products were characterized with X-ray powder diffraction (XRD), transmission electronic microscope (TEM), and X-ray photoelectron spectrocope (XPS). Results show that the tungsten carbide supporter has pure tungsten carbide phase with pore size of about 10-20 nm. Pt particles (3.4 nm mean size) which are mainly in the metallic form are dispersed on the external walls and pores of m-WC. The electro-catalytic activity of the prepared Pt/m-WC towards the oxidation of methanol was investigated using cyclic voltammetry and chronoamperometry. In comparison to the common tungsten carbide supported Pt catalyst (Pt/c-WC), the Pt/m-WC catalysts exhibits high electrocatalytic activity, strong anti-poisoning ability and good stability.

Key words: direct methanol fuel cell, tungsten carbide, mesoporous materials, electro-catalysis

中图分类号:

O646

胡仙超, 胡建冠, 孙洁, 李国华. 介孔碳化钨负载铂催化剂对甲醇氧化的电催化性能[J]. 无机材料学报, 2013, 28(12): 1286-1290.

HU Xian-Chao, HU Jian-Guan, SUN Jie, LI Guo-Hua. Mesoporous Tungsten Carbide Supported Pt and Their Electro Catalytic Activity for Methanol Electro-oxidation[J]. Journal of Inorganic Materials, 2013, 28(12): 1286-1290.

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介孔碳化钨负载铂催化剂对甲醇氧化的电催化性能

Mesoporous Tungsten Carbide Supported Pt and Their Electro Catalytic Activity for Methanol Electro-oxidation

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