Surface Structure Control of Nanocrystals and Their Catalytic Properties: From Metal Oxides (SnO2, CeO2, and Cu2O) to Pt-Based Noble Metal

Abstract

由于催化反应主要发生在催化剂的表界面,因此催化剂的表界面结构在很大程度上影响着催化剂的催化活性。具有不同表界面结构的催化剂往往会表现出不同的催化活性。因此,如何通过调控表界面结构来提高纳米催化剂的催化活性和稳定性以及降低催化剂的成本是近些年来人们研究的主要方向。本论文主要围绕两大方向进行了研究:(1)控制合成出了具有高表面能晶面裸露的金属氧化物(SnO2,CeO2和Cu2O)和高Pd原子分散度的Pd/CeO2纳米催化剂,并研究了这些催化剂对CO氧化的催化活性。(2)在Pd二十面体和十面体的表面沉积只有几个原子层厚的Pt壳,分别得到了Pd@Pt核壳结构的二十面体和内凹十面体纳米催化剂,并研究了P...Surface structure of the catalyst is one of important factors that determine the catalytic activity of catalyst itself, as the catalytic reaction mainly happened on the surface of the catalyst. Catalysts with different surface structures usually exhibit different catalytic activities. How to enhance the catalytic activity and durability, as well as decrease the cost through structure control of ca...学位:理学博士院系专业:化学化工学院_物理化学学号:2052011015371

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