Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (07): 822-830 .DOI: 10.6023/A1110011 Previous Articles     Next Articles

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有序介孔二氧化硅-碳纳米管复合材料载Pt 及其电催化性能

胡园园, 何建平, 王涛, 郭云霞, 薛海荣, 李国显   

  1. 南京航空航天大学材料科学与技术学院 南京 210016
  • 收稿日期:2011-10-01 修回日期:2011-12-31 出版日期:2012-04-14 发布日期:2012-01-20
  • 通讯作者: 何建平 E-mail:jianph@nuaa.edu.cn
  • 基金资助:

    国家自然科学基金(No. 50871053)资助项目.

Fabrication of Ordered Mesoporous Silica-Carbon Nanotubes Composites as Catalyst Supports for Loading with Pt Nanoparticles and Their Electrocatalytic Performance

Hu Yuanyuan, He Jianping, Wang Tao, Guo Yunxia, Xue Hairong, Li Guoxian   

  1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
  • Received:2011-10-01 Revised:2011-12-31 Online:2012-04-14 Published:2012-01-20
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (No. 50871053).

Ordered mesoporous silica-carbon nanotubes composites have been obtained using tetraethylorthosilicate as silicon source and cetyltrimethylammonium bromide as templating agent and subsequentlyl were used as supports for loading with platinum nanoparticles by a microwave-irradiated polyol process. X-ray diffraction (XRD) and transmission electron microscope (TEM) show that carbon nanotubes is highly dispersed into silicon oxidation substrate. Electrocatalysis tests reveal that Pt-C/Si catalysts show excellent catalytic performance, which could be due to the doped of the high electrical conductivity carbon nanotubes (CNTs) and the ordered mesoporous structure that is beneficial to electron transfers. When 40 milligram of carbon nanotubes was added to the composites, the electrochemical active surface area (EASA) of this electrocatalyst is 120.9 m2-1 in 0.5 mol稬-1 H2SO4 sulotion, which is higher than Pt-CNTs electrocatalyst and the peak current of methanol oxidation is 80.3 mA穋m-2. Thus, this composite is promising for applications in direct methanol fuel cell.

Key words: ordered mesoporous silicon dioxide, carbon nanotubes, Pt-C/Si catalysts, microwave irradiation, electrocatalysis oxidation