| 镧、锰掺杂改性CeO2-ZrO2-Al2O3固溶体的性能 |
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| 引用本文： | 张雪乔,信欣,刘建英,刘盛余,赵明,陈耀强.镧、锰掺杂改性CeO2-ZrO2-Al2O3固溶体的性能[J].高等学校化学学报,2011,32(10):2360-2366. |
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| 作者姓名： | 张雪乔 信欣 刘建英 刘盛余 赵明 陈耀强 |
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| 作者单位： | 1. 四川大学化学学院, 绿色化学与技术教育部重点实验室, 成都 610064;
2. 成都信息工程学院资源环境学院, 成都 610025 |
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| 基金项目： | 国家自然科学基金，国家教育部博士学科点基金 |
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| 摘 要： | 采用共沉淀法制备了一系列La, Mn共掺杂的CeO2-ZrO2-A12O3(CZA)复合氧化物, 采用BET, XRD, H2-TPR, XPS和XRF等方法对样品进行表征. 结果表明, 全部样品均形成了稳定的CZA固溶体, 经600 ℃焙烧后表现出良好的织构性能, 1000 ℃老化后, La, Mn共掺杂样品具有最佳的高温稳定性; H2-TPR测试表明, La, Mn之间存在正协同效应, 共掺杂的样品具有最佳的低温还原性能和高温稳定性; XPS结果表明, 掺杂La可有效抑制在焙烧过程中Mn向表面的迁移, 从而保持较高的表面吸附氧浓度.
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| 关 键 词： | CeO2-ZrO2-A12O3 MnOx 还原性能 |
| 收稿时间： | 2011-01-17 |
Effects of Doping La, Mn on the Properties of CeO2-ZrO2-Al2O3 |
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| ZHANG Xue-Qiao,XIN Xin,LIU Jian-Ying,LIU Sheng-Yu,ZHAO Ming,CHEN Yao-Qiang.Effects of Doping La, Mn on the Properties of CeO2-ZrO2-Al2O3[J].Chemical Research In Chinese Universities,2011,32(10):2360-2366. |
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| Authors: | ZHANG Xue-Qiao XIN Xin LIU Jian-Ying LIU Sheng-Yu ZHAO Ming CHEN Yao-Qiang |
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| Institution: | 1. College of Chemistry, Key Laboratory of Green Chemistry and Technology, Ministry of Education, Sichuan University, Chengdu 610064, China;
2. College of Resource and Environment, Chengdu University of Technology, Chengdu 610025, China |
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| Abstract: | A series of materials CeO2-ZrO2-A12O3(CZA) were prepared by the co-precipitation method and characterized by specific surface area measurements (BET), X-ray diffraction (XRD), H2-temperature-programmed reduction (H2-TPR), and X-ray photoelectron spectroscopy (XPS). The results showed that these successfully-prepared CZA solid solutions had an optimum textural performance after calcinations at 600℃ for 3h and the support sample of doping La and Mn together still possessed the high thermal stability. According to the H2-TPR, the modified sample by La and Mn showed a best property of reducibility in low temperature. XPS results indicated that by doping La, the transfer of Mn from the bulk to the surface in calcinations was restrained and the concentration of adsorbed oxygen was retained． |
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| Keywords: | CeO2-ZrO2-A12O3 MnOx Redox property |
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