金催化剂的修饰及其对CO催化氧化性能、机理和失活研究

项目名称： 金催化剂的修饰及其对CO催化氧化性能、机理和失活研究

项目编号： No.21271110

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 张守民

作者单位： 南开大学

项目金额： 80万元

中文摘要： 本项目设计并制备一种新型金属氧化物修饰的TiO2负载金催化剂，对其低温CO催化氧化性能及其催化反应机理和失活机理进行研究。 金纳米粒子表面存在的金属氧化物能够增强金-载体界面相互作用，从而提高催化活性。而且，金属氧化物既可以充当第二载体的作用，还起到抑制金粒子烧结的作用，从而提高催化剂的稳定性。在制备催化活性高、抗烧结能力强的新型金催化剂的同时，选择性质不同的氧化物修饰金粒子并进行比较研究，探讨反应机理和失活机理。 本项目中修饰后的金纳米粒子既不是合金状态，也未形成核壳结构。设计的催化剂也不同于混合氧化物载体或掺杂载体负载催化剂，是一个新的研究课题，具有明显的创新性。该项目为研究负载型金催化剂催化氧化CO的反应机理和失活机理提供了一种新的研究途径，具有重要的理论价值和应用意义。

中文关键词： 金催化剂；TiO2；CO氧化；一维；金属氧化物

英文摘要： In this project, a new type of TiO2 supported Au catalysts modified with metal oxides is designed and synthesized, and their catalytic activity, catalytic reaction mechanism and deactivation mechanism are studied. The metal oxides on the surface of Au nanoparticles could enhance Au-support interfacial interaction, thus improve their catalytic activity. And the metal oxides not only play the role of second support, but also have inhibitory effect of sintering of Au particles, thus improve their stability. while the novel Au catalysts possessed with high catalytic activity and strong antisintering are synthesized, Au particles modified with different metal oxides are comparative studied, and the reaction mechanism and deactivation mechanism are investigated. In this project, the modified Au particles are neither alloy state nor core/shell structure. And the designed catalysts are different from mixed oxide supported or doped oxide supported catalysts. This project is a new research subject, and is obviously innovative. This project provides a new research thinking for the catalytic reaction mechanism and deactivation mechanism of supported Au catalysts for CO catalytic oxidation, and have important theoretical value and practical significance.

英文关键词： gold catalyst；TiO2；CO Oxidation；One-dimensional；metal oxide