现场拉曼光谱研究非水体系中铂电极上甲醇的解离吸附  

In situ Raman Spectroscopy Studies on the Dissociation of Methanol on a Platinum Electrode in a Nonaqueous System

作　　者：顾仁敖[1] 曹文东[1] 曹佩根[1] 孙玉华[1] 姚建林[2] 任斌[2] 田中群[2] 

机构地区：[1]苏州大学化学系,苏州215006 [2]厦门大学固体表面物理化学国家重点实验室化学系,厦门361005

出　　处：《光散射学报》2001年第1期8-11,共4页The Journal of Light Scattering

基　　金：国家自然科学基金;厦门大学固体表面物理化学国家重点实验室开放课题资助项目

摘　　要：本文在共焦显微拉曼系统上 ,利用表面增强拉曼散射效应 ( SERS)初步研究了非水体系中甲醇在粗糙铂电极上的解离吸附过程。结果表明 :甲醇在粗糙铂电极上解离吸附后产生了毒性中间物 CO,在较负的电位区间内 ,H与 CO共吸附于电极表面并影响 CO的吸附行为 ,随电位的正移 ,υPt- C和 υC- O的变化可以用电化学 Stark效应来进行解释。Based on a confocal microprobe Raman system, the dissociation process of methanol on a roughened platinum electrode in a non agueous system was investigated by SERS. It is found that upon dissociation, carbon monoxide was produced on the surface as a poisoning intermediate. At relative negative potentials, H co adsorbs with CO on the electrode surface, thus affecting the properties of the adsorbed CO and its spectral feature. The variation of υ Pt C and υ C O with increasing potential can be explained by the electrochemical Stark effect.Key wrods:SERS; non aqueous system; methanol; platinum electrode

关 键 词：表面增强拉曼散射 SERS 非水体系 甲醇 铂电极 解离吸附 CO STARK效应 现场拉曼光谱 

分 类 号：O657.37[理学—分析化学] O647.3[理学—化学]