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用常规Raman光谱、电化学原位表面增强拉曼散射光谱 (SERS)和时间分辨SERS光谱 (TRSERS)研究了甲基硫脲 (MTU)分别在HClO4 、H2 SO4 、HNO3以及它们两两混合的酸性介质中与一种或两种弱吸附无机阴离子的共吸附行为 .发现MTU是以S端按σ配位化学吸附键的方式 ,在 - 0 .2～ - 0 .7V的较正电位区间偏向于甲基一侧倾斜吸附在银电极表面上 ;在 - 0 .8～ - 1.2V的较负电位区间 ,则偏向于甲基一侧斜躺吸附在银电极表面上
The effects of methyl thiourea (MTU) on the acidity of HClO4, H2SO4, HNO3 and their mixtures were studied by conventional Raman spectroscopy, electrochemical in situ surface enhanced Raman scattering spectroscopy (SERS) and time resolved SERS spectroscopy (TRSERS) The co-adsorption behavior of the MTU with one or two weakly adsorbed inorganic anions in the medium was found to be sigma-coordinated chemisorption bonds at the S-terminal and was found to be biased at a more positive potential range of -0.2 to -0.7 V Methyl side of the inclined adsorption on the silver electrode surface; -0.8 ~ - 1.2V in the more negative potential range, the bias side of the methyl side of the bias lying on the silver electrode surface adsorption