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首次用激光产生的第二谐振光(SHG)检测到金属/水溶液界面上阴离子在多晶铜电极表面上的吸附,阴离子吸附特性对SHG强度影响明显,由多晶铜电极在(0.5-x)mol/L NaClO_4+xmol/L NaBr溶液中的SHG强度-电位曲线表明铜电极表面对ClO_4~-的吸附非常弱,对Br~-有特定的吸附,SHG强度随Br~-浓度增加而增强,结果表明SHG是定量研究电化学界面区吸附特性的灵敏有效的探针,可揭示金属与吸附质间相互作用的本质。
For the first time, the adsorption of anionic on the surface of polycrystalline copper electrode was detected by the SHG of the laser. The anionic adsorption has an obvious effect on the SHG intensity. From the polycrystalline copper electrode, the (0.5-x) The SHG intensity-potential curve in mol / L NaClO 4 + x mol / L NaBr solution shows that the adsorption of ClO 4 - on the copper electrode surface is very weak and Br- is adsorbed on the copper electrode surface. The SHG intensity increases with the increase of Br ~ The results show that SHG is a sensitive and effective probe for the quantitative study of the adsorption characteristics of the electrochemical interface region, revealing the nature of the interaction between the metal and the adsorbate.