Abstract
Abstract The Cu-doped CeO 2 spheres were synthesized by a simple hydrothermal method. It is confirmed that the spheres composed of many tiny particles are favorable for the gas diffusion in the inner pores. The doping copper is demonstrated to increase the storage and mobility of oxygen vacancy, surface area, and chemisorption sites for CO and enhance the redox capability, which can efficiently convert CO to CO 2 at low temperature. The excellent catalytic performance of Cu (10 at.%)-doped CeO 2 spheres are associated with the porous spherical structure, high redox capability and high oxygen vacancy.
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