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采用电位置换反应以及化学还原法制备了单分散PtNi纳米粒子,循环伏安结果显示该纳米粒子在0.1mol·L-1硫酸介质中对CO的氧化表现出比本体Pt电极更好的电催化活性.以CO为探针分子,采用电化学原位红外光谱研究了PtNi纳米粒子上的特殊红外光学性能.结果表明,PtNi纳米粒子无论是在玻碳电极还是在金电极上,均表现出对称的双极谱峰,同时给出很强的增强效应.论文研究结果有助于进一步了解低维纳米材料特殊红外性能的本质.
The monodispersed PtNi nanoparticles were prepared by potentiometric displacement reaction and chemical reduction. The cyclic voltammetry results showed that the nanoparticles exhibited better electrocatalytic activity for the oxidation of CO in the 0.1 mol·L -1 sulfuric acid medium than the bulk Pt electrode The specific infrared optical properties of PtNi nanoparticles were investigated by electrochemical in situ FTIR with CO as probe molecule.The results showed that the PtNi nanoparticles showed symmetry at either the glassy carbon electrode or the gold electrode Bipolar peak, and gives a strong enhancement effect.The results of the paper will help to further understand the nature of the special infrared properties of low-dimensional nanomaterials.