物理化学学报 >> 2008, Vol. 24 >> Issue (05): 839-843.doi: 10.1016/S1872-1508(08)60037-6

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碳材料中多层次孔对负载铂电催化活性的影响

周建华; 何建平; 计亚军; 赵桂网; 张传香; 陈秀; 王涛   

  1. 南京航空航天大学材料科学与技术学院, 南京 210016
  • 收稿日期:2007-12-03 修回日期:2008-01-31 发布日期:2008-05-05
  • 通讯作者: 何建平 E-mail:jianph@nuaa.edu.cn

Influence of Hierarchical Porosity in Carbon Material on Electrocatalytic Property of Supported Pt Nanoparticles

ZHOU Jian-Hua; HE Jian-Ping; JI Ya-Jun; ZHAO Gui-Wang; ZHANG Chuan-Xiang; CHEN Xiu; WANG Tao   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China
  • Received:2007-12-03 Revised:2008-01-31 Published:2008-05-05
  • Contact: HE Jian-Ping E-mail:jianph@nuaa.edu.cn

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摘要： 分别以商用碳黑XC-72、介孔碳CMK-5和含多层次孔的碳气凝胶HCA为载体, 微波法负载Pt纳米粒子, 在硫酸和甲醇溶液中进行循环伏安测试, 考察碳材料中多层次孔对其电催化活性的影响. 结果显示, Pt/HCA电极表现出较高的峰电流(7.5 mA·cm-2)和电化学活性面积(128.0 m2·g-1). 这可能是因为碳气凝胶具有连续但非周期性的介孔结构, 有利于Pt纳米粒子的分散以及反应物质的传质.

关键词: 碳气凝胶, 多层次孔, 铂纳米粒子, 介孔, 电催化活性

Abstract: The influence of hierarchical porosity on electrocatalytic property was investigated with Pt nanoparticles supported on three types of carbon materials, namely, commercial Vulcan XC-72, ordered mesoporous carbon CMK-5, and hierarchical carbon aerogel (HCA). The electrocatalytic activity of carbon supported Pt nanoparticles was verified by cyclic voltammetry in H2SO4 and CH3OH solution. Pt/HCA presented superior performance with higher peak current (7.5 mA·cm-2) and electrochemical active area (128.0 m2·g-1). This could be attributed to the carbon aerogel with continuous but nonperiodical mesopore structure, which facilitated dispersion of Pt nanoparticles and mass transport around reactants and products.

Key words: Carbon aerogel, Hierarchical porosity, Pt nanoparticles, Mesopore, Electrocatalytic property