Abstract: The catalytic reactivity of CeO2 not only depends on the particle size but al so closely relates to the morphology. The nanostructure and redox characteristic of CeO2 were analyzed in the paper, and the effects of the CeO2 structure a nd morphology on the representative catalytic reactions, including CO oxidation, water gas shift, and ethanol steam reforming, where the morphology-dependent c atalysis is well demonstrated, were summarized.

Key words: ceria, nanostructure, redox, morphology effect, heterogeneous catalytic reaction