Synthesis of mesocrystal CeO2 hollow spheres and their catalytic performance on CO oxidation

Journal of Shanghai Normal University (Natural Sciences)

CHEN Feifei¹  BIAN Zhenfeng²  CAO Fenglei²  WANG Jinguo² 

[1] College of Environmental and Chemical Engineering,Shanghai University of Electric Power;College of Life and Environment Sciences,Shanghai Normal University;

关键词: mesocrystal;    CeO₂ hollow sphere;    CO oxidation;    high energy facets;   

DOI  :  

来源: DOAJ

【 摘 要 】

The highly active mesocrystal CeO₂ hollow spheres with exposed (110) high energy facets were synthesized by hydrothermal process.We studied the formation process and proposed the formation mechanism.The as-synthesized catalyst was characterized by the X-ray diffraction,transmission electron microscopy,and N₂ adsorption-desorption isotherms.It was found that the mesocrystal CeO₂ hollow spheres had porous structure and high specific surface area (259 m²/g).The catalytic oxidation of CO to CO₂ was selected as the model reaction to characterize the performance of the mesocrystal CeO₂.The result showed that the mesocrystal CeO₂ hollow spheres displayed higher catalytic activity than the commercial CeO₂ sample mainly due to their mesocrystal structure,high surface area,the hollow structure,and the exposed (110) high energy facets.

【 授权许可】

Unknown