CeO2在汽车尾气净化、水气变换、CO氧化等领域应用前景广阔。调控纳米CeO2形貌和金属负载以提高其催化活性，已成为纳米催化领域的研究热点。本项目拟采用热分解法制备形貌规则的CeO2纳米片，采用XRD、SEM、XAFS等对CeO2的结构、形貌、表面进行表征分析，探究焦磷酸钠、油酸钠等矿化剂对CeO2纳米片形貌的调控规律，揭示其成核及生长机理；然后制备CeO2纳米片-金属(如金、镍、铂、钯等)逆负载型催化剂，以水气变换和CO氧化等为探针反应，采用XPS、H2-TPR等研究其氧化还原性能，探索纳米CeO2形貌、表面晶面及与金属接触界面效应对催化性能的影响，研究纳米CeO2与金属的相互作用机制，揭示纳米CeO2"形貌-晶面-微结构-催化性能"构效关系。该研究有助于丰富二维纳米材料生长知识，为在纳米尺度甚至原子层次上进行实用高效CeO2-金属逆负载型催化剂的设计与构建提供理论依据和指导。

CeO2 nanomaterials have widely employed in many applications such as exhaust gas cleaning, water-gas shift, CO oxidation and etc. The study on the shape control of CeO2 nanocrystals and metal supporting has drawn ever increasing attention in order to increase the catalytic activity. Based on our previous research results, in this project we propose to further explore the synthesis of monodisperse CeO2 nanoplates with regular shapes by thermal decomposition. The structure, morphology and surface will be characterized by XRD, SEM, XAFS and etc. The role of mineralizers（i.e. sodium pyrophosphate, sodium oleate）on the morphological control of CeO2 nanoplates and the nucleation/growth mechanism of CeO2 nanoplates will be investigated in depth. And after that the inverse CeO2 nanoplates/metal (i.e. Au, Ni, Pt, Pd) catalysts would be prepared. The oxidation and reduction activity will be evaluated by TPR, XPS (water-gas shift and CO oxidation as a probe). The effect of the morphology, crystal-plane and the interfacial interaction between CeO2 plates and metals on the catalytic properties of inverse catalysts will be explored. The interaction mechanism between the CeO2 nanoplates and supporting metals, and the inherent relationship among the crystal planes and catalytic activity will be established. This research helps to enrich the knowledge of 2D nanomaterials, and provide the theoretical basis for the design and construction of high-efficient CeO2-metal inverse catalysts on the nanometer or atomic scale.