Density Functional Theory Studies on the Niobium、Rhodium Clusters and their Reactive Mechanisms with Small Molecules in the Gas Phase

Abstract

过渡金属团簇由于其特殊的物理和化学性质一直被关注,而二元过渡金属合金团簇也因具备新奇的性质成为实验和理论研究的热点。本论文研究了前后过渡金属Nb-Rh团簇并讨论了其电子性质和成键规律。很多过渡金属也是高效的催化剂,过渡金属表面催化各种小分子的反应引起了人们的兴趣。过渡金属铑是常用的汽车尾气催化剂,汽车尾气污染的主要成分是NO和CO等,研究NO在过渡金属铑团簇上的吸附与解离反应对于揭示复杂的表面化学反应有重要的意义。过渡金属铂与铑一样也具有很好的催化性能,它们都可以作为工业上催化甲烷和氨来合成氰化氢和氢气的催化剂。尽管目前这些过渡金属与小分子气体的反应有很多实验观测,相关理论仍欠缺。本论文用密度...As the special physical and chemical properties, the transition metal clusters have been most studied, and the bimetallic clusters also have become a subject of intensive interest experimently and theoretically. The early-late transition metal Nb-Rh clusters have been studied in this dissertation, the properties and geometry structures are discussed. The transition metal also is the effective cata...学位:理学博士院系专业:化学化工学院化学系_物理化学(含化学物理)学号:2005140308

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