| Catalytic Activity of Ceria-Zirconia Nanostructured Materials Prepared via Reversed Microemulsion Method |
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| 作者姓名： | 安源 朱凌云 王军 沈美庆 |
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| 作者单位： | An Yuan,Zhu Lingyun,Wang Jun(Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 30007, China);Shen Meiqing(Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University, Tianjin 30007, China;State Key Laboratory of Engines, Tianjin University,Tianjin 300072, China) |
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| 基金项目： | ProjectsupportedbytheNational‘973’Project(2004CB719503) |
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| 摘 要： | CeO2-ZrO2mixed oxides have a number of i mpor-tant catalytic applications1].They are extensively em-ployed in current automotive three-way catalysts(TWCs)as the oxygen storage promoters,i.e.materi-als that regulate the oxygen partial pressure throughtheC…
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| 关 键 词： | CeO2-ZrO2 微乳液 催化活性 制备 稀土 纳米材料 |
| 文章编号： | 1002-0721（2005）06-0690-05 |
| 收稿时间： | 2005-06-06 |
| 修稿时间： | 2005-09-16 |
Catalytic Activity of Ceria-Zirconia Nanostructured Materials Prepared via Reversed Microemulsion Method |
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| An Yuan,Zhu Lingyun,Wang Jun,Shen Meiqing.Catalytic Activity of Ceria-Zirconia Nanostructured Materials Prepared via Reversed Microemulsion Method[J].Journal of Rare Earths,2005,23(6):690-694. |
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| Authors: | An Yuan Zhu Lingyun Wang Jun Shen Meiqing |
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| Abstract: | Single-phase homogeneous Ce1- xZrxO2 solid solutions with various compositions were synthesized using the reversed microemulsion method. The structural properties and performance of Ce1- x ZrxO2 were studied using XRD, BET,SEM, HRTEM, TPR and CO oxidation measurements. The results show that in the range of x = 0.4 ～ 0.5 and x = 0.6 ～1.0, the solid solutions posses the cubic and the tetragonal phase structure, respectively. Solids obtained by the reversed microemulsion method were more homogeneous on the whole range of composition. XRD investigations of the prepared materials did not show segregation of cerium or zirconium oxides. Highly uniform nanosize solid solution particles of ceria-ziroxidation measurements indicate that the performance of the CeO2-ZrO2 mixed oxides is strongly related to the composition and structure of the oxides. Enhancement of the activity was found for the catalyst prepared by reversed microemulsion method as compared to the sample prepared by sol-gel method. |
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| Keywords: | CeO_2-ZrO_2 solid solution reversed microemulsion nanosize catalytic property carbon monoxide oxidation rare earths |
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