高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 150.

• 研究论文 • 上一篇    下一篇

制备条件对甲醇电氧化催化剂PtRu/CAs性能的影响

邹阅超,李霞,黄永民,刘洪来   

  1. 华东理工大学结构可控先进功能材料及其制备教育部重点实验室,  上海  200237
  • 收稿日期:2010-03-05 修回日期:2010-04-21 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 黄永民 E-mail:huangym@ecust.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20736002)和教育部长江学者创新团队计划(批准号:   IRT0721)资助.

Effect of Preparation Conditions on the Catalytic Performances of PtRu/CAs Catalysts for Methanol Electro-oxidation

ZOU Yue-Chao, LI Xia, HUANG Yong-Min*, LIU Hong-Lai   

  1. Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai 200237, China
  • Received:2010-03-05 Revised:2010-04-21 Online:2011-01-10 Published:2010-12-11
  • Contact: Huang Yong-Min E-mail:huangym@ecust.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20736002)和教育部长江学者创新团队计划(批准号:   IRT0721)资助.

摘要: 本文利用液相浸渍还原的方法制备了PtRu/C催化剂, 其中Pt质量百分含量分别为15%, Pt和Ru的原子比为2:1. 研究了金属前驱体于不同介质(CH3COOH、H2O及CH3COONa)中浸渍所制备的催化剂组成, 结构以及活性方面的区别. 同时比较分析了不同载体(碳纳米管CNTs与碳气凝胶CAs)对催化剂性能的影响. 催化剂的物化性质通过XRD, TEM以及EDS来表征, 并采用循环伏安法测试其电化学性能. 结果表明以碳气凝胶为载体,均匀分散于异丙醇与水混合溶液后, 加入CH3COOH, 使金属前驱体在酸性介质中浸渍, 再用NaOH调节pH值至碱性, 同时生成CH3COONa作为稳定剂, 然后再用NaBH4还原所制得的催化剂具有更高的电催化活性, 其峰电流密度达到38.24 mA/cm2, 远高于本文中在其他条件下制备的催化剂.

关键词: PtRu/C催化剂, 甲醇氧化, 电催化剂, 碳气凝胶

Abstract: The impregnation method was applied to prepare the platinum – ruthenium (Pt-Ru) catalysts in which the content of Pt was 15%, and the atomic ratio of Pt and Ru was 2:1. The properties of the catalysts prepared with varied impregnated mediums (acetic acid, sodium acetate and water) and different carriers (carbon nanotubes and carbon aerogels) were studied in detail. The X-ray diffractometry(XRD) and transmission electron midroscopy(TEM) were used to observe the surface morphology of above Pt-Ru catalysts. The Energy Dispersive X-ray Spectrum(EDS) was used to analyze the composition of catalysts. The electrochemical performance of the catalysts was examined by cyclic voltammetry with a glassy carbon working electrode in a solution of 1.0 mol/L CH3OH and 0.5 mol/L H2SO4. In above all catalysts, the catalyst prepared with the metal precursor impregnated in CH3COOH and carbon aerogels as a carrier has the highest electrocatalytic activity. The peak current density gets to 38.24 mA/cm2, which is much higher than the rest of the catalysts prepared with other conditions in this paper.

Key words: PtRu/C, Methanol oxidation, Electrocatalyst, Carbon aerogels

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