| CexZr1-xO2固溶体储氧性能与结构的关系 |
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| 引用本文： | 詹瑛瑛,蔡国辉,肖益鸿,郑起,魏可镁.CexZr1-xO2固溶体储氧性能与结构的关系[J].光谱学与光谱分析,2007,27(11):2266-2269. |
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| 作者姓名： | 詹瑛瑛 蔡国辉 肖益鸿 郑起 魏可镁 |
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| 作者单位： | 福州大学化肥催化剂国家工程研究中心,福建,福州,350002 |
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| 基金项目： | 国家自然科学基金
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福建省教育厅资助项目 |
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| 摘 要： | 采用加热回流技术制备了系列CexZr1-xO2(0.25≤x≤1)固溶体,通过N2物理吸附、XRD、Raman光谱、UV-Vis漫反射光谱表征了不同铈锆组成的铈锆复合氧化物结构对储氧性能的影响.结果表明,在铈锆组成比不同的样品之间,结构性质相差较大,随着载体中ZrO2 mol%的增加,载体结构从相对的有序经无序再回到相对的有序.Ce0.4Zr0.6O2样品具有最高的储氧性能,而Ce0.25Zr0.75O2样品具有较高的热稳定性.
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| 关 键 词： | 铈锆氧化物固溶体 储氧性能 拉曼光谱 紫外-可见漫反射光谱 |
| 文章编号： | 1000-0593（2007）11-2266-04 |
| 收稿时间： | 2006-07-28 |
| 修稿时间： | 2006-11-02 |
The Relationship between Structure and Oxygen Storage Capacity of CexZr1-xO2 Solid Solution |
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| ZHAN Ying-ying,CAI Guo-hui,XIAO Yi-hong,ZHENG Qi,WEI Ke-mei.The Relationship between Structure and Oxygen Storage Capacity of CexZr1-xO2 Solid Solution[J].Spectroscopy and Spectral Analysis,2007,27(11):2266-2269. |
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| Authors: | ZHAN Ying-ying CAI Guo-hui XIAO Yi-hong ZHENG Qi WEI Ke-mei |
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| Institution: | National Engineering Research Center of Chemical Fertilizer Catalyst at Fuzhou University, Fuzhou 350002, China. |
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| Abstract: | Heating reflux aging technology was applied to prepare a series of Ce(x)Zr(1-x)O2 (0.25 < or = x < or = 1) solid solution. The effects of the Ce(x)Zr(1-X)O2 composition on the structure and oxygen storage capacity were characterized using N2 physical adsorp tion, X-ray diffraction (XRD), FT-Raman, UV-Vis diffuse spectroscopy techniques. The texture, structure and thermal stability of ceria-zirconia mixed oxides are closely related to the ratio of cerium to zirconium in the solid solution, with increasing the zirconium content, the specific area increases, and the structure undergoes a change of order --> disorder --> order. Among them, Ce(0.4Zr(0.6)O2 sample possesses the maximum OSC and Ce(0.25)Zr(0.75)O2 sample possesses the best thermal stability. |
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| Keywords: | CeO2-ZrO2 solid solution Oxygen storage capacity Raman spectroscopy UV-Vis diffuse reflection spectroscopy |
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