催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (11): 1109-1113.

• 研究论文 • 上一篇    下一篇

热处理对多元醇法制备的 PtRu/C 电催化剂的影响

闫世友1,2, 孙公权1, 齐静1,2, 高妍1,2, 辛勤1,3   

  1. 1 中国科学院大连化学物理研究所, 辽宁大连 116023 2 中国科学院研究生院, 北京 100049 3 中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023
  • 收稿日期:2009-11-25 出版日期:2009-11-25 发布日期:2013-07-17

Effect of Heat Treatment on the PtRu/C Electrocatalyst Prepared by the Polyol Method

YAN Shiyou1,2, SUN Gongquan1,*, QI Jing1,2, GAO Yan1,2, XIN Qin1,3   

  1. 1Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2009-11-25 Online:2009-11-25 Published:2013-07-17

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摘要： 采用热重、在线质谱、X 射线衍射和透射电镜等技术研究了热处理对多元醇法制备的 PtRu/C 电催化剂催化活性的影响. 结果表明, 热处理前电催化剂表面吸附较多残余物种, 在惰性气氛中 200 oC 下热处理 2 h 可以去除部分吸附物种. 虽然热处理后电催化剂的平均粒径比热处理前稍有增大, 但电催化剂颗粒的分散度仍较高. 热处理后电催化剂催化甲醇电氧化反应的活性明显提高.

关键词: 铂, 钌, 热处理, 多元醇法, 甲醇电化学氧化, 直接甲醇燃料电池

Abstract: The effect of heat treatment on catalytic activity of a PtRu/C electrocatalyst synthesized by the polyol method was investigated by thermogravimetry, on-line mass spectroscopy, X-ray diffraction,?and transmission electron microscopy. The results indicate that abundant species adsorbs on the electrocatalyst surface, which can be effectively removed by heat-treating at 200 oC under inert atmosphere for 2 h. The particle size of the electrocatalyst increases slightly after heat treatment, but the particles remain good dispersion on the carbon support. Electrochemical and direct methanol fuel cell single cell test results indicate that the catalytic activity of PtRu/C for methanol electrooxidation is greatly improved by the heat treatment process.

Key words: platinum, ruthenium, heat treatment, polyol method, methanol electrooxidation, direct methanol fuel cell