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碱性条件下Pt-M(Ni, Fe, Mo)/C电催化氧化甲醇的性能对比研究

刘世斌, 刘勇, 孙彦平, 张忠林, 郝晓刚, 李一兵   

  1. 太原理工大学洁净化工研究所, 太原 030024
  • 收稿日期:2006-06-27 修回日期:1900-01-01 出版日期:2007-05-10 发布日期:2007-05-10
  • 通讯作者: 孙彦平

Performance of Methanol Oxidation on Pt-M(M=Ni, Fe, Mo) Electro-Catalysts in Alkaline Media

LIU Shi-Bin, LIU Yong, SUN Yan-Ping*, ZHANG Zhong-Lin, HAO Xiao-Gang, LI Yi-Bing   

  1. Department of Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2006-06-27 Revised:1900-01-01 Online:2007-05-10 Published:2007-05-10
  • Contact: SUN Yan-Ping

摘要: 采用溶胶法制备了碳载Pt-M(M为Ni, Fe, Mo)电催化剂, 并用TEM和XRD技术表征活性物微观结构, 实验结果表明, Pt基合金微粒在碳黑表面分布均匀, 粒径约为2~4 nm. 用循环伏安法测定催化剂在不同碱性条件下的活性, 研究结果表明, 不同掺杂元素催化剂的活性大小顺序为Pt75Ni25/C>Pt75Fe25/C>Pt50Mo50/C, 掺杂Ni可明显地促进纳米Pt的催化活性, Pt75Ni25/C在1.0 mol/L NaOH+1.0 mol/L CH3OH溶液中的峰电流密度可以达到726.9 mA/mg.

关键词: 碱性介质, Pt基合金电催化剂, 甲醇, 电氧化

Abstract: Carbon supported Pt-M(M=Ni, Fe, Mo) catalysts were prepared with colloidal method. The catalysts were characterized by TEM and XRD, and the activities of different catalysts were measured via the cyclic voltammetry under an alkaline condition for methanol electro-catalytic oxidation. The results show that Pt-based alloys are distributed homogeneously on carbon, the particle sizes are about 2—4 nm, and the activities order of Pt-based alloys is Pt75Ni25/C>Pt75Fe25/C>Pt50Mo50/C. The doping of Ni in the nano-particles of Pt was able to markedly enhance the catalytic activities of Pt/C, and the peak current of Pt75Ni25/C catalyst reached 726.9 mA/mg in 1.0 mol/L NaOH+1.0 mol/L CH3OH solution in this experiment.

Key words: Alkaline media, Pt-based alloy catalysts, Methanol, Electro-oxidation

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