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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (12): 1960-1964. 上一篇    下一篇

研究论文

粗糙铂电极上甲酸吸附氧化的电化学原位表面增强拉曼光谱研究

钟起玲;王小聪;章磊;张小红;向娟;任斌;田中群   

  1. 江西师范大学化学学院;天津科技大学基础科学系;厦门大学化学系
  • 发布日期:2003-12-15

In-situ SERS Study on the Electro-oxidation with HCOOH on a Roughened Platinum Electrode

Zhong Qiling;Wang Xiaocong;Zhang Lei;Zhang Xiaohong;Xiang Juan;Ren Bin;Tian Zhongqun   

  1. Department of Chemistry, Jiangxi Normal University;Department of Science, Tianjin University of Science and Technology;Department of Chemistry, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University
  • Published:2003-12-15

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975

被引次数

48 | 10

采用循环伏安法和电化学原位表面增强拉曼光谱（SERS）技术研究甲酸的解离 及附与氧化行为。首次报道了甲酸吸附、解离和氧化的电化学原位SERS谱，发现甲 酸在粗糙铂电极上能自发解离吸附；首欠成功地获得了粗糙铂电极上甲酸吸附解离 的强吸附中间体CO和活性中间体COOH的表面增强拉曼光谱，同时首次检测到甲酸氧 化最终产物CO_2的拉曼光谱信号，从分子水平证实甲酸解离吸附反应的双途径机理 。

关键词: 甲酸, 铂, 电极, 解吸, 表面增强拉曼光谱, 循环伏安法, 反应机理

The dissociative adsorption and oxidation behavior of HCOOH on Pt was investigated by cyclic voltammogram (CV) and in-situ surface enhanced Raman spectroscopy (SERS) techniques. The in-stiu SERS of HCOOH adsoiption, dissociation and oxidation on rough Pt is reported. It is found that HCOOH can spontaneously dissociate. The surface Raman spectra of CO, the strongly adsorbed intermediate and COOH, the weakly adsorbed intermediate of the dissociative adsorption of HCOOH were successfully obtained for the first time. At the same time, the Raman spectra of the finally oxidized product CO2 of HCOOH was also firstly detected. The dual path reaction mechanism for the oxidation of HCOOH was confirmed at molecular level.

Key words: FORMIC ACID, PLATINUM, ELECTRODE, DESORPTION, SERS, CYCLOVOLTAMGRAPH, REACTION MECHANISM

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