高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (11): 2618.

• 研究论文 • 上一篇    下一篇

碱性介质中W, Ni和Sn掺杂的Pt-Ru/C电催化氧化甲醇的性能

段东红, 张忠林, 张涛, 刘世斌, 郝晓刚, 李一兵   

  1. 太原理工大学化学化工学院, 太原 030024
  • 收稿日期:2011-01-18 修回日期:2011-04-28 出版日期:2011-11-10 发布日期:2011-10-14
  • 通讯作者: 刘世斌 E-mail:sbliu@tyut.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20676088)和教育部博士点基金(批准号: 20091402110009)资助.

Performance of Pt-Ru/C Catalysts Doped with W, Ni and Sn for Electrocatalytic Oxidation of Methanol in Alkaline Media

DUAN Dong-Hong, ZHANG Zhong-Lin, ZHANG Tao, LIU Shi-Bin*, HAO Xiao-Gang, LI Yi-Bing   

  1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2011-01-18 Revised:2011-04-28 Online:2011-11-10 Published:2011-10-14
  • Contact: LIU Shi-Bin E-mail:sbliu@tyut.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20676088)和教育部博士点基金(批准号: 20091402110009)资助.

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被引次数

5

摘要： 直接以Pt, Ru, W, Ni和Sn的金属盐为前驱体, 通过溶胶法制备了不同原子比的Pt-Ru-M/C(M=W, Ni, Sn)碳载纳米合金催化剂, 用X射线衍射(XRD)和X光电子能谱(XPS)表征催化剂的晶相结构、表面组成及价态形式, 采用循环伏安法测试催化剂电催化氧化甲醇活性. 结果表明, 掺杂Ni和W可明显提高Pt-Ru/C催化活性, 掺杂Sn则降低了Pt-Ru/C催化活性. 其中Pt5-Ru4-Ni0.7/C的活性最高, 在1.0 mol/L NaOH＋1.0 mol/L CH3OH溶液中峰电流达835.2 mA/mg, 甲醇起始氧化电位比Pt5-Ru5/C低约0.11 V.

关键词: 碱性介质, 甲醇, 电氧化, 铂基合金, 活性

Abstract: The catalysts of Pt-Ru-M/C(M=W, Ni, Sn) with different atom ratio were prepared by colloidal method. The surface composition and crystal structure of nano-particle supported by carbon black were characterized by X-ray diffraction and X-ray photoelectron spectroscopy. The catalyst activity in different methanol and NaOH concentration electrolytes was measured by cyclic voltammeter. The results show that the perfor-mance of methanol electro-oxidation on the Pt-Ru/C catalysts can be improved markedly by doping with Ni and W, and be reduced by doping with Sn, and the peak current density on Pt5-Ru4-Ni0.7/C reaches 835.2 mA/mg and the onset potential of methanol electro-oxidation is 0.11 V lower than that of Pt5-Ru5/C in 1.0 mol/L NaOH+1.0 mol/L CH3OH.

Key words: Alkline media, Methanol, Electro-oxidation, Pt-based alloy, Activity

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