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用化学还原法制备铂金属纳米微粒.经TEM表征纳米Pt微粒的平均直径为2.5nm.应用电化学循环伏安法研究了该纳米微粒电极的电化学性质,与本体Pt相比,吸附在Pt纳米微粒表面CO的氧化电流峰较宽.原位傅里叶变换红外反射光谱检测到Pt纳米微粒电极表面的孪生吸附态CO,以及随电极电位变化线型吸附和孪生吸附态CO向桥式吸附态CO的转化过程.还发现了Pt纳米微粒上吸附态CO的增强红外吸收等一系列特殊性能.
The Pt nanoparticles were prepared by chemical reduction method.The average diameter of the nanoparticles was 2.5nm by TEM.The electrochemical properties of the nanoparticles were investigated by electrochemical cyclic voltammetry and compared with the Pt The oxidation current peak of CO on the surface of nanoparticles was wide. In situ Fourier transform infrared reflectance spectroscopy was used to detect the twin adsorption state CO on the surface of Pt nanoparticle electrode and the linear adsorption of CO to the surface of Pt nanoparticle. State CO conversion process was also found on the Pt nanoparticle adsorption of CO enhanced infrared absorption and a series of special properties.