碱性溶液中纳米钯膜电极表面CO、CN^-吸附的红外反射光谱研究

In Situ FTIR Spectrocopic Studies of CO and CN^- Adsorbed on Electrode of Nanometer Thin Film of Palladium in Alkaline Solutions

以原位FTIR反射光谱研究碱性介质中CO和CN-在纳米Pd膜电极上的吸附和共吸附 ,进一步揭示了纳米薄膜材料的异常红外效应和CO与CN-共吸附时的相互作用规律。

The adsorption and coadsorption of CO and CN- - on electrode of nanometer thin film of palladium (nm-Pd/GC)was studied by usin g in situ FTIR spectroscopy.The results demonstrated that the nm-Pd/GC electrod e exhibited abnormal infrared effects (AIREs) in alkaline solutions as in acid s olutions.The characters of AIREs,i.e.,the inversion of the direc tion of IR band,the augmentation of FWHM and the significant enhancement of IR a bsorption by adsorbed species were observed in all cases of adsorption and coads orption of CO and CN--.It has been illustrated that strong interaction is exis ted between adsorbed CO and CN-- on nm-Pd/GC surface.The study has contribute d towards understanding the surface processes of chemisorption as well as to rev eal the origin of nanometer size-effects of thin film materials.