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  

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

作　　者：钟起玲[1] 王小聪[2] 章磊[1] 张小红[1] 向娟[3] 任斌[3] 田中群[3] 

机构地区：[1]江西师范大学化学学院,南昌330027 [2]天津科技大学基础科学系,天津300222 [3]厦门大学化学系固体表面物理化学国家重点实验室,厦门361005

出　　处：《化学学报》2003年第12期1960-1964,共5页Acta Chimica Sinica

基　　金：教育部重点项目基金 (No.0 2 0 80 );江西省自然科学基金 (No.992 0 0 0 3);厦门大学固体表面物理化学国家重点实验室基金(No.960 6)资助项目

摘　　要：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吸附与氧化行为 .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 ;首次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CO2 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 .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 adsorption, 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.

关 键 词：铂电极 甲酸 电氧化 解离吸附 表面增强拉曼光谱 电化学 

分 类 号：O657.37[理学—分析化学]