物理化学学报 >> 2014, Vol. 30 >> Issue (1): 83-87.doi: 10.3866/PKU.WHXB201311012

电化学和新能源 上一篇    下一篇

中空介孔三氧化钨微球载钯催化剂的甲酸氧化电催化性能

周阳1,2, 胡仙超3, 李立清2, 陈喜蓉2   

  1. 1 江西理工大学钨资源高效开发及应用技术教育部工程研究中心, 江西赣州 341000;
    2 江西理工大学冶金与化学工程学院, 江西赣州 341000;
    3 浙江工业大学分析测试中心, 杭州 310032
  • 收稿日期:2013-08-11 修回日期:2013-10-29 发布日期:2014-01-01
  • 通讯作者: 胡仙超 E-mail:huxc@zjut.edu.cn
  • 基金资助:

    江西理工大学博士后科研基金，浙江省科技厅项目(2013C37104)和江西省自然科学基金(20132BAB213009)资助

Palladium Nanoparticles Supported on Hollow Mesoporous Tungsten Trioxide Microsphere as Electrocatalyst for Formic Acid Oxidation

ZHOU Yang1,2, HU Xian-Chao3, LI Li-Qing2, CHEN Xi-Rong2   

  1. 1 Engineering Research Center of High-Efficiency Development and Application Technology of Tungsten Resources, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China;
    2 Metallurgical and Chemical Engineering Institute, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China;
    3 Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, P. R. China
  • Received:2013-08-11 Revised:2013-10-29 Published:2014-01-01
  • Contact: HU Xian-Chao E-mail:huxc@zjut.edu.cn
  • Supported by:

    The project was supported by the Postdoctoral Project Fund of Jiangxi University of Science and Technology, China, Zhejiang Province Science and Technology Department, China (2013C37104), and Natural Science Foundation of Jiangxi Province, China (20132BAB213009).

PDF

1407

赞

摘要：

采用喷雾干燥法和焙烧处理制备中空介孔三氧化钨微球(HMTTS)，在其表面进一步负载活性成分Pd，得到纳米Pd/HMTTS复合催化剂. 采用X射线粉末衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)等对催化剂的形貌和晶型结构进行了表征. 结果表明，Pd纳米粒子为面心立方晶体结构，均匀地分布在HMTTS表面. 采用循环伏安和计时电流法研究了在酸性溶液中Pd/HMTTS 催化剂对甲酸的电催化氧化性能，结果表明Pd/HMTTS 催化剂比普通的三氧化钨载钯催化剂(Pd/WO3)对甲酸呈现出更高的电催化氧化活性和稳定性.HMTTS独特的中空介孔结构和表面特性以及氢溢流效应有利于甲酸在钯表面的直接脱氢氧化过程的发生.

关键词: 直接甲酸燃料电池, 甲酸氧化, 三氧化钨, 电催化, 介孔材料

Abstract:

Hollow mesoporous tungsten trioxide microsphere (HMTTS) was synthesized by spay drying method and employed as the support material for Pd catalyst. The catalyst was characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The Pd nanoparticles had a face-centered cubic crystal structure and were well dispersed on the external walls of HMTTS. The as-prepared Pd/HMTTS catalyst exhibits higher electrocatalytic activity and good stability during formic acid oxidation in comparison to Pd/WO3 catalyst. The enhanced catalytic performance is attributed to the unique structure and surface properties of HMTTS and the hydrogen spillover effect which greatly accelerates the direct dehydrogenation of formic acid on palladium.

Key words: Direct formic acid fuel cell, Formic acid oxidation, Tungsten trioxide, Electrocatalyst, Mesoporous material