物理化学学报 >> 2011, Vol. 27 >> Issue (08): 1881-1885.doi: 10.3866/PKU.WHXB20110827

电化学和新能源 上一篇    下一篇

不同温度烧制介孔碳作为直接甲醇燃料电池催化剂载体

徐群杰, 李金光, 李巧霞   

  1. 上海电力学院能源与环境工程学院, 上海 200090
  • 收稿日期:2011-03-17 修回日期:2011-05-12 发布日期:2011-07-19
  • 通讯作者: 徐群杰 E-mail:xuqunjie@shiep.edu.cn
  • 基金资助:

    国家自然科学基金项目(20873031), 上海市教委科技创新重点项目(10ZZ116), 上海市科委能力建设项目(09230501400, 10160502300)和上海市人才发展基金资助

Preparation of Mesoporous Carbon at Different Temperatures as a Catalyst Support for Direct Methanol Fuel Cells

XU Qun-Jie, LI Jin-Guang, LI Qiao-Xia   

  1. Department of Thermal Power and Environmental Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R.China
  • Received:2011-03-17 Revised:2011-05-12 Published:2011-07-19
  • Contact: XU Qun-Jie E-mail:xuqunjie@shiep.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20873031), Innovation Program of Shanghai Municipal Education Commission, China (10ZZ116), Key Project of Shanghai Committee of Science and Technology, China (09230501400, 10160502300) and Talent Development Fund of Shanghai, China.

摘要:

以嵌段共聚物P123为模板制备介孔氧化硅SBA-15, 并以此SBA-15为模板, 以蔗糖为碳源在不同的温度下(600-900 °C)制备介孔碳CMK-3. 采用浸渍还原法, 以硼氢化钠为还原剂, 制备介孔碳载Pt电催化剂, 即20% (w) Pt/CMK-3. 利用循环伏安法(CV)、计时电流法等测试电催化剂对甲醇的催化氧化性能及稳定性. 预吸附单层CO溶出伏安法研究测试催化剂抗CO中毒能力. 结果表明在烧制温度为900 °C时制备的介孔碳载Pt催化剂具有最好的催化性能和稳定性, 而在烧制温度为700 °C时制备的介孔碳载Pt催化剂对CO有较低的溶出电位.

关键词: 介孔碳, 甲醇, Pt, CO溶出

Abstract:

Using mesoporous SiO2 (SBA-15) as templates and sugar as a carbon precursor, mesoporous carbon (CMK-3) was prepared at different temperatures (600-900 °C). 20%(w) Pt/CMK-3 was then prepared by impregnation reduction with sodium borohydride as a reductant. Cyclic voltammetry (CV) and chronoamperometry were applied to study the catalytic performance and stability toward methanol oxidation for the as-prepared catalyst. CO striping voltammetry was used to determine its anti-poisoning capability toward CO. The results show that the Pt/CMK-3 prepared at 900 °C had the best catalytic performance and stability toward methanol but at a carbonization temperature of 700 °C the Pt catalyst had a lower stripping potential to CO.

Key words: Mesoporous carbon, Methanol, Pt, CO striping

MSC2000: 

  • O643