| 摘要: |
| 以水热法成功制备了(110)面暴露的高活性多孔单晶CeO2空壳球催化剂样品,研究了其形成过程并提出了相应的形成机理.通过X射线衍射、透射电镜及低温氮气吸附/脱附等温线对催化剂结构进行了详细的表征,结果表明：该材料具有多孔结构以及较高的比表面积(259 m2/g).该多孔单晶CeO2催化剂在CO氧化转化中显示了较好的催化性能,其催化活性远高于商业化CeO2,这主要归结于其特殊的(110)高能面的暴露以及多孔单晶结构. |
| 关键词: 多孔单晶 CeO2空壳球 CO氧化 高能面暴露 |
| DOI： |
| 分类号: |
| 基金项目:上海师范大学科研项目（SK201227,DYL201308） |
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| Synthesis of mesocrystal CeO2 hollow spheres and their catalytic performance on CO oxidation |
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WANG Jinguo1, CHEN Feifei2, CAO Fenglei1, BIAN Zhenfeng1
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1.College of Life and Environment Sciences,Shanghai Normal University;2.College of Environmental and Chemical Engineering,Shanghai University of Electric Power
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| Abstract: |
| 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. |
| Key words: mesocrystal CeO2 hollow sphere CO oxidation high energy facets |
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