本文概述了我们最近利用表面增强拉曼散射技术研究金属/乙腈界面区痕/微量水分子的界面行为所取得的进展.研究表明银电极双电层中存在多种吸附模式下的水分子结构.处于非水环境下的水分子的VO-H与水系相比存在明显的差别.水分子间的氢键被不同程度地破坏导致几种模式下的水分子VOH均要高于水体系.铂电极表面的研究表明水分子的介入很大程度上限制了铂表面乙腈分子的解离吸附反应.

The progress on the study of the adsorption behavior of trace water at the interface of metal/acetonitrile as a function of applied potential by using surface-enhanced Raman scattering (SERS) was briefly reviewed in this paper. Results show that several adsorption modes of water exist in the electrochemical double layer of silver. There are great differences between the nonaqueous acetonitrile system and aqueous one on the frequency of the vibration of ν O-H, whose value is higher in nonaqueous system. Potential-dependent SER spectra obtained from Pt electrodes show that the addition of water with a certain concentration inhibited greatly the dissociation reaction of acetonitrile at the interface.