Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (12): 1327-1331.DOI: 10.6023/A1202222     Next Articles

Special Topic


张彩萍, 郭清华, 徐敏敏, 袁亚仙, 姚建林, 顾仁敖   

  1. 苏州大学材料与化学化工学部苏州 215123
  • 投稿日期:2012-02-22 修回日期:2012-05-14 发布日期:2012-06-16
  • 通讯作者: 姚建林
  • 基金资助:

    国家自然科学基金(Nos. 21073128, 21033007, 20973120)资助项目

Electrocatalysis on Oxidation of Methanol and SERS Investigations of Au@Pt Monolayer Film

Zhang Caiping, Guo Qinghua, Xu Minmin, Yuan Yaxian, Yao Jianlin, Gu Renao   

  1. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123
  • Received:2012-02-22 Revised:2012-05-14 Published:2012-06-16
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Nos. 21073128, 21033007, 20973120).

Au@Pt core-shell nanoparticles were successfully synthesized via the seed-mediate growth method and were self-assembled to be a monolayer film at the water/hexane interface. After being carefully transferred onto a glassy carbon (GC) electrode, a monolayer film electrode was fabricated with high Au@Pt surface-to-volume ratio. It was found that good dispersion of Au@Pt core-shell nanoparticles on the surface of GC electrode was achieved, resulting in the uniform monolayer film electrode. It was resulted that the as-prepared monolayer film electrode exhibited high electrocatalytic activity for methanol oxidation. Moreover, the monolayer film exhibited excellent surface enhanced Raman spectroscopic (SERS) activity due to the long-range enhancement effect from the Au nanoparticles core, which was well recognized as a good SERS substrate. Therefore, it can be served as a SERS substrate for investigating the surface adsorption and reactions at the molecular level. According to these advantages of the monolayer film electrode, the reaction process of methanol oxidation was monitored by in situ SERS detection via combining the strong SERS activity and the high electrocatalytic activity of the monolayer film electrode. The data supplies the basis on analyzing the mechanism of methanol oxidation on Au@Pt film/GC electrode.

Key words: Au@Pt, monolayer film electrode, surface enhanced Raman spectroscopy (SERS), electrocatalysis, methanol