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A Mechanism Study on IR Spectra Properties of CO Adsorption on Nanostructure Pt Surfaces

Abstract

本文以CO-Pt化学吸附体系为例,从体系中粒子间以及粒子与外场间的相互作用关系研究了体系极化率、相互作用能、能量转移等问题。指出这些相互作用的变化将引起吸附分子极化率、覆盖度、红外谱线等的变化。理论计算结果表明,金属吸附表面的纳米结构将导致分子红外吸收谱线性质的变化,产生异常红外效应。本文重点分析了CO-Pt吸附体系分子间及分子与表面局域电场的相互作用的形式,计算了等效偶极子的极化率、纳米结构金属表面的纳米颗粒附近的局域电场、吸附分子的空间分布、红外振动谱线等。本文的主要贡献归纳如下:(1)研究吸附体系的分子势能函数,应用嵌入能原子方法,建立了体系模型,分析CO-Pt吸附体系多粒子间的相互作用...This dissertation is concerned with the chemical adsorption of CO-Pt system, from many aspects, such as polarizability, interaction energy, energy transfer, through the interactions among atoms (or molecules), as well as atoms with external field near the CO-Pt surface. It is found that the changes of these interactions may give rise to the changes of the polarizabilities, the coverage and the IR ...学位:理学博士院系专业:物理与机电工程学院物理学系_理论物理学号:B20042400

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