非水体系中镍表面Raman光谱研究新进展

本文利用共焦显微拉曼系统 ,获得有机乙醇溶剂中吡啶分子吸附在硝酸刻蚀镍电极表面的拉曼光谱 ,与水体系相比谱峰强度有所降低。根据表面拉曼光谱中吡啶分子环呼吸振动峰 ν1向高波数方向移动 (与液态吡啶分子相比 )推测吡啶分子通过氮原子以垂直 (或略微倾斜 )方式作用于镍电极表面 ,且随电位负移其与镍表面的作用逐渐减弱。

New Progress in the Surface Raman Spectroscopic Study on Nickel Electrode in Non-aqueous System

Using the confocal micro Raman system we have observed the surface Raman spectrum of pyridine adsorbed on a HNO 3 etched nickel electrode surface in a non aqueous system for the first time. The spectrum obtained is similar to that acquired from pyridine adsorbed at Ni surface in a solution of 0.1 M KCl except for less peak intensity for the latter. Results also show that the pyridine molecule is adsorbed onto the nickel electrode via its nitrogen lone pair with the end on configuration.