| Surface and Texture Properties of Tb-Doped Ceria-Zirconia Solid Solution Prepared by Sol-Gel Method |
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| 作者姓名： | 樊国栋 冯长根 张昭 |
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| 作者单位： | [1]Institute of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xianyang 712081, China [2]State Key Laboratory of Prevention and Control of＇Explosion Disasters, Beijing Institute ofTechnology, Bering 100081, China |
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| 基金项目： | Project supported by the Natural Science Basic Research Plan in Shaanxi Province of China （2004B13） |
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| 摘 要： | The three-way catalysts （TWCs） promoters Ce0.6Zr0.4- x TbxO2-y were prepared by sol-gel method. BET surface areas analysis indicated that an increase of the dopant Tb content from x = 0.05 to x = 0.15 favors an increase of surface area from 66.8 to 80.4 m^2· g^-1 compared with the undoped sample Ce0 .6oZr0.40O2 65.1 m^2·g^- 1 after calcination at 650℃. Transmission electron microscopy （TEM） observation indicated that the doped samples have a higher thermal stability. The XRD and Raman spectra confirmed that the Ce0.6Zr0.4-xTbxO2-y cubic solid solution is formed. XPS analysis revealed that Ce and Tb mainly existed in the form of Ce^4＋ and Tb^3 ＋ , and Zr existed in the form of Zr^4＋ on the surface of the samples. The doped samples were homogenous in composition ; the introduction of Tb into the CeO2-ZrO2 promoters resuited in the formation of a solid solution, and the concentration of surface lattice oxygen was increased.
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| 关 键 词： | 二氧化铈 氧化锆 固溶体 溶胶凝胶法 铽掺杂 表面性能 |
| 文章编号： | 1002-0721（2007）01-0042-06 |
| 收稿时间： | 22 May 2006 |
| 修稿时间： | 2006-05-222006-06-21 |
Surface and Texture Properties of Tb-Doped Ceria-Zirconia Solid Solution Prepared by Sol-Gel Method |
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| Fan , Feng Changgen,Zhang Zhao.Surface and Texture Properties of Tb-Doped Ceria-Zirconia Solid Solution Prepared by Sol-Gel Method[J].Journal of Rare Earths,2007,25(1):42-47. |
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| Authors: | Fan Feng Changgen Zhang Zhao |
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| Affiliation: | 1. Institute of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xianyang 712081, China; 2. State Key Laboratory of Prevention and Control of Explosion Disasters, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | The three-way catalysts (TWCs) promoters Ce0.6Zr0.4-xTbxO2-y were prepared by sol-gel method. BET surface areas analysis indicated that an increase of the dopant Tb content from x=0.05 to x=0.15 favors an increase of surface area from 66.8 to 80.4 m2·g-1 compared with the undoped sample Ce0.60Zr0.40O2 65.1 m2·g-1 after calcination at 650 ℃. Transmission electron microscopy (TEM) observation indicated that the doped samples have a higher thermal stability. The XRD and Raman spectra confirmed that the Ce0.6Zr0.4-xTbxO2-y cubic solid solution is formed. XPS analysis revealed that Ce and Tb mainly existed in the form of Ce4+ and Tb3+, and Zr existed in the form of Zr4+ on the surface of the samples. The doped samples were homogenous in composition;the introduction of Tb into the CeO2-ZrO2 promoters resulted in the formation of a solid solution, and the concentration of surface lattice oxygen was increased. |
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| Keywords: | Ce0 6Zr0 4-xTbxO2-y solid solution three-way catalysts sol-gel method surface and texture structure rare earths |
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