Surface Structure and Thermal Stability of Platinum Group Metallic Nanoparticles with High-Index Facets

Abstract

铂族金属纳米粒子由于具有优异的催化性能,已被广泛地应用于燃料电池,石油化工,汽车催化转化器等领域。但是,稀缺的资源以及昂贵的价格严重地限制了它们的应用。为了满足工业上日益增长的需求,如何提高它们的催化活性和催化效率就成为了工业催化领域的一个关键问题。高指数晶面纳米粒子的成功合成为解决这一问题提供了一条新的途径。高指数晶面是指密勒指数{hkl}中至少有一个指数大于1的晶面。这类晶面拥有高密度的低配位原子,这些原子分布在具有高活性的催化位点,如台阶、棱边和扭结位。因此,高指数晶面纳米粒子表现出了极大的应用潜力。本文应用分子动力学方法,对高指数晶面铂族金属纳米粒子的结构稳定性和热稳定性进行了系统的研...Platinum-group metallic nanoparticles are widely used as indispensable catalysts in fuel cells, petrochemical reforming and automotive catalytic converters due to their excellent catalytic performance. However, the rare reserve and high cost severely limit its further usage. In order to meet the increasing demand in industry, how to improve the intrinsic catalytic properties and utilization effici...学位:理学博士院系专业:物理科学与技术学院_凝聚态物理学号:1982013015423

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