Morphology-dependent surface chemistry and catalysis of CeO2 nanocrystals

Surface chemistry and catalysis over oxide nanocrystals with well-defined morphologies are emerging as a hot topic, and the relevant progress on CeO2 nanocrystals is critically reviewed. CeO2 nanocrystals expose morphology-dependent crystal planes on their surfaces, and CeO2 nanocrystal and metal/CeO2 nanocrystal catalysts exhibit morphology-dependent surface chemistry and catalysis. A comprehensive analysis of the published literature nicely correlates the surface chemistry and catalysis of CeO2 nanocrystal and metal/CeO2 nanocrystal catalysts with the surface composition/structure and oxygen vacancy structure of exposed CeO2 crystal planes. A concept of morphology engineering of oxide nanocrystals not only for the optimization of the catalytic performance but also for the fundamental understanding of the structure-activity relation and catalytic reaction mechanism is discussed.

具有明确形貌的氧化物纳米晶体的表面化学和催化作用正在成为一个热门话题，并且对二氧化铈纳米晶体的相关进展进行了批判性综述。二氧化铈纳米晶体在其表面暴露出与形貌相关的晶面，并且二氧化铈纳米晶体和金属/二氧化铈纳米晶体催化剂表现出与形貌相关的表面化学和催化作用。对已发表文献的综合分析很好地将二氧化铈纳米晶体和金属/二氧化铈纳米晶体催化剂的表面化学和催化作用与暴露的二氧化铈晶面的表面组成/结构以及氧空位结构相关联。讨论了氧化物纳米晶体的形貌工程概念，其不仅用于优化催化性能，还用于对结构 - 活性关系和催化反应机理的基本理解。