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Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (20): 2302-2304. Previous Articles     Next Articles

Reports

Ru膜上Pt层的自发沉积及其在电化学表面增强红外光谱中的应用

李巧霞a， 王金意a ，徐群杰b， 蔡文斌*,a

  

  1. (a复旦大学化学系 ，上海 ，200433;)
    (b上海电力学院环境工程系 ，上海 ，200090)

  • 投稿日期:2008-05-05 修回日期:2008-05-30 发布日期:2008-10-28
  • 通讯作者: 蔡文斌

Spontaneous Deposition of Pt Overlayer on Ru Film and iIts Application in Electrochemical Surface-enhanced IR Absorption Spectroscopy

LiI, Qiao-Xia a , WangANG, Jin-Yi a , XuU, Qun-Jie b, Cai, Wen-Bin *,a   

  1. (a Department of Chemistry, Fudan University, Shanghai 200433;)
    (b Department of Environmental Engineering, Shanghai University of Electric Power, Shanghai, 200090)
  • Received:2008-05-05 Revised:2008-05-30 Published:2008-10-28
  • Contact: Cai, Wen-Bin

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A spontaneous deposition approach was developed to form a Pt ultrathin overlayer onto a Ru nanoparticle film (simplified hereafter as Ru/Pt film) in which the freshly electroreduced Ru film wereas subsequently immersed in a deaerated H2PtCl6 solution without potential control. Voltammetric measurements indicated that Pt content increased with the number of the reduction-immersion cycles, and CO adlayer could be electro-oxidized at a much lower potential on the Ru/Pt film electrode than on a Pt film electrode. With in situ attenuated-total-reflection surface-enhanced IR absorption spectroscopy (ATR-SEIRAS), CO molecules adsorbed on both Pt and Ru sites of the Ru/Pt film electrode could be easily identified. In addition to a synergetic effect towards the electrocatalytic oxidation of CO, this as-deposited Ru/Pt film can be applicable to in situ ATR-SEIRAS measurements.

Key words: Pt-on-Ru electrode, spontaneous deposition, electrocatalysis, CO, ATR-SEIRAS