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利用共焦显微拉曼系统、结合合适的电极表面粗糙方法研究了非水体系 0 1mol/LLiClO4 /CH3CN溶液中 ,乙腈分子在金表面的吸附和解离行为。结果表明非水体系中乙腈可在金表面发生还原反应 ,产物CN- 离子与电极表面作用形成的表面配合物可在较宽的电位区间吸附于电极表面。溶液中的微量水、激光照射以及电极电位均对该反应有较大的影响。通过拉曼谱图的比较得出乙腈分子解离出的CN- 在金电极表面比在银电极表面有更强的吸附作用。
The confinement and dissociation behavior of acetonitrile molecules on the gold surface were investigated by confocal microscopy Raman system and a suitable electrode surface roughening method in 0 1 mol / L LiClO4 / CH3CN solution. The results show that acetonitrile in non-aqueous system can be reduced on the gold surface, and the surface complexes formed by the interaction between the product CN- and the electrode surface can be adsorbed on the electrode surface over a wide potential range. The solution of trace water, laser irradiation and the electrode potential of the reaction have a greater impact. The comparison of Raman spectra shows that the CN- ion dissociated by acetonitrile can adsorb more strongly on the surface of gold electrode than on silver electrode.