非水体系中甲醇在粗糙铂电极上解离吸附的表面增强拉曼 光谱研究

利用共焦显微拉曼系统和表面增强拉曼散射(SERS)效应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，随电位正移，ν~P~t~-~C的变化可以用电化学Stark效应进行解释，而ν~C~~O的变化则是由于电化学Stark效应和CO偶极耦合的共同作用所引起的。

SERS investigation on the dissociation of methanol on a roughened Pt electrode in nonaqueous system

By utilizing SERS (Surface-enhanced Raman Scattering) technique and a confocal microprobe Raman system, the dissociation of methanol on a roughened platinum electrode in nanoqueous system was investigated. It is found that upon the dissociation of methanol on a roughened platinum electrode, carbon monoxide exists on the surface as the poisoning intermediate. At relative negative potentials, H may coadsorb with CO on the electrode surface, and thus influence the spectral feature of CO signal. Positive movement of the potential, the variation of ν~P~t~-~C can be explained by the electrochemical Stark effect while the change of ν~C~-~O can be interpreted by the combination of the electrochemical stark effect and the dipole-dipole coupling effect.