Ceria Nanotubes with High Oxygen Storage Capacity and PROX Activity and Stability against High Temperature Aging

摘要

Introduction Ceria has been widely employed as an oxygen buffer in the field of catalysis because it has shown high oxygen storage capacity [1]. Modifying the particle size and shape of ceria could enhance the oxygen storage capacity. For this reason, nanostructured ceria such as ceria nanorods, nanotubes, nanowires, nanocubes and nanoplates have been synthesized using different methods [2]. Mai et al. describe in the preparation of nanostructured ceria powders using a controlled hydrothermal method, and report that the nanorod morphology showed, among the different nanostructures they produced, the highest oxygen storage capacity. In this work, the stability of the redox and catalytic performance and preferential oxidation of CO in large excess of hydrogen (PROX) of nanostructured ceria have been studied.