CO adsorption on electrode of Pt nanoparticles investigated by cyclic voltammetry and in situ FTIR spectroscopy  

作　　者：CHEWWei JIANGYanxia 等 

机构地区：[1]DepartmentofChemistry.StateKeyLaboratoryforPhysicalChemistryofSolidSurfacees,XiamenUniversity,Xiamen361005,China [2]DepartmentofChemistry.StateKeyLaboratoryforPhysicalChemistryofSolidSurfacees,XiamenUniv

出　　处：《Chinese Science Bulletin》2003年第2期135-139,共5页

基　　金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 29833060,20021002 and 90206039).

摘　　要：Pt nanoparticles were prepared by the chemical reduction method. The average diameter of Pt nanoparticles was determined to be 2.5 nm by TEM. The electrochemical properties of Pt nanoparticles were studied by cyclic volt-ammetry. In comparison with massive Pt, the oxidation cur-rent peak of CO adsorbed on Pt nanoparticles is broader. Twin adsorbates of CO on Pt nanoparticles were determined by in situ FTIRS for the first time. It has revealed that the linear and twin-bonded CO can be converted into bridge-bonded CO with the variation of electrode potential. A series of special properties of Pt nanoparticles, such as enhanced IR absorption of CO adsorbates, were also ob-served.Pt nanoparticles were prepared by the chemical reduction method. The average diameter of Pt nanoparticles was determined to be 2.5 nm by TEM. The electrochemical properties of Pt nanoparticles were studied by cyclic volt-ammetry. In comparison with massive Pt, the oxidation cur-rent peak of CO adsorbed on Pt nanoparticles is broader. Twin adsorbates of CO on Pt nanoparticles were determined by in situ FTIRS for the first time. It has revealed that the linear and twin-bonded CO can be converted into bridge-bonded CO with the variation of electrode potential. A series of special properties of Pt nanoparticles, such as enhanced IR absorption of CO adsorbates, were also ob-served.

关 键 词：铂 纳米颗粒 电极 CO吸附 伏安测量法 原位FTIR 电化学 催化活性 

分 类 号：TB383[一般工业技术—材料科学与工程] O657.15[理学—分析化学]