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.