高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (10): 2360.

• 研究论文 • 上一篇    下一篇

镧、锰掺杂改性CeO2-ZrO2-Al2O3固溶体的性能

张雪乔1,2, 信欣2, 刘建英2, 刘盛余2, 赵明1, 陈耀强1   

  1. 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
  • 收稿日期:2011-01-17 修回日期:2011-05-30 出版日期:2011-10-10 发布日期:2011-09-11
  • 通讯作者: 陈耀强;赵明 E-mail:nic7501@scu.edu.cn;zhaoming@scu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20773090)和国家教育部博士学科点基金(批准号: 200806100009)资助.

Effects of Doping La, Mn on the Properties of CeO2-ZrO2-Al2O3

ZHANG Xue-Qiao1,2, XIN Xin2, LIU Jian-Ying2, LIU Sheng-Yu2, ZHAO Ming1*, CHEN Yao-Qiang1*   

  1. 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
  • Received:2011-01-17 Revised:2011-05-30 Online:2011-10-10 Published:2011-09-11
  • Contact: CHEN Yao-Qiang;ZHAO Ming E-mail:nic7501@scu.edu.cn;zhaoming@scu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20773090)和国家教育部博士学科点基金(批准号: 200806100009)资助.

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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.

关键词: CeO2-ZrO2-A12O3, MnOx, 还原性能

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．

Key words: CeO2-ZrO2-A12O3, MnOx, Redox property

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