物理化学学报 >> 1993, Vol. 9 >> Issue (06): 721-723.doi: 10.3866/PKU.WHXB19930601

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SERS谱峰对电极电位阶跃的不同响应速率的证据

田中群; 李五湖; 高劲松; 毛秉伟   

  1. 固体表面物理化学国家重点实验室，厦门大学化学系，厦门 361005
  • 收稿日期:1993-07-26 修回日期:1993-09-02 发布日期:1993-12-15
  • 通讯作者: 田中群

Evidence for Different Responsing Rates of Different sers Bands of Surface Species on Change of Electrode Potentials

Tian Zhong-Qun; Li Wu-Hu; Gao Jin-Song; Mao Bing-Wei   

  1. State Key Laboaratory for Physical Chemistry of the Solid Surface, Department of Chemistry, Xiamen University, Xiamen 361005
  • Received:1993-07-26 Revised:1993-09-02 Published:1993-12-15
  • Contact: Tian Zhong-Qun

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关键词: 表面增强拉曼散射, 时间分辨, 硫脲, 共吸附, 银电极

Abstract: In-situ time resolved Raman spectroscopy has been used to study the coadsorption of thiourea (TU) and ClO_4~- at Ag electrodes. The time resolved SERS intensities were monitored following electrode potential steps. As the electrode potential was stepped from -0.3 V to -0.9 V, the SERS intensities of TU were able to follow the potential change immediately. However, pro-longed time was needed for the intensities to follow the step from -0.9 V to -0.3 V. Significant difference of the rate of intensity change for different SERS bands of TU was observed even in such a potential step, which may be related to the changes in orientation of TU or its configuration with the coadsorbed ClO_4~-.

Key words: Surface enhanced Raman scattening, Times resolved, Thiourea, Coadsorption, Ag electrodes