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采用可有效破坏H_2O分子间氢键的高浓度的ClO_4~-为主要支持电解质,在比通常低数十倍浓度的卤素离子体系中可获得很强的H_2O的表面增强Raman散射(SERS)信号,并可在含SCN~-体系中观察到H_2O的SERS现象。在0.1mol/LLiCl和3mol/L LiClO_4体系中的SERS谱表明电极表面上存在两种性质十分不同的H_2O分子,文中较详细地讨论这一异常现象。采用合适的电解质和电极表面处理可扩展对H_2O的SERS研究,更深入认识电化学界面的复杂结构。
High concentration of ClO_4 ~ - which can effectively destroy H_2O intermolecular hydrogen bonds as the main supporting electrolyte, can obtain strong surface-enhanced Raman scattering (SERS) signal of H_2O in the halide ion system which is several times lower than usual. And SERS phenomenon of H_2O can be observed in SCN ~ - containing system. The SERS spectra in 0.1 mol / L LiCl and 3 mol / L LiClO 4 show that there are two H 2 O molecules with very different properties on the surface of the electrode. This anomalous phenomenon is discussed in detail in this paper. SERS study of H_2O can be extended with appropriate electrolyte and electrode surface treatment to understand the complex structure of electrochemical interface.