物理化学学报 >> 2006, Vol. 22 >> Issue (05): 532-537.doi: 10.3866/PKU.WHXB20060504

研究论文 上一篇    下一篇

TiO2-CeO2介孔复合氧化物的合成及应用

张雪红;唐星华;程新孙   

  1. 南昌航空工业学院环境与化学工程系,南昌330034；南昌大学化学系,南昌330047
  • 收稿日期:2005-11-02 修回日期:2005-11-21 发布日期:2006-04-28
  • 通讯作者: 张雪红 E-mail:zxh114079@yahoo.com.cn

Synthesis and Application of Ce-doped Mesoporous TiO2

ZHANG Xue-Hong;TANG Xing-Hua;CHENG Xin-Sun   

  1. Department of Environmental and Chemical Engineering, Nanchang Institute of Aeronautical Technology, Nanchang 330034, P. R. China; Department of Chemistry, Nanchang University, Nanchang 330047, P. R. China
  • Received:2005-11-02 Revised:2005-11-21 Published:2006-04-28
  • Contact: ZHANG, Xue-Hong E-mail:zxh114079@yahoo.com.cn

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摘要： 以氯化十六烷基吡啶(C16PyCl)为模板剂, 在室温、中性条件下合成了TiO2-CeO2介孔复合氧化物, 分别用红外光谱(FT-IR)、X射线粉末衍射(XRD)和BET 比表面测定等技术对介孔TiO2的结构、晶相和比表面积进行了表征. 结果表明, Ce4+的引入能稳定介孔结构. 负载活性组分Ru 后, Ru 颗粒与介孔复合载体发生相互作用, 尽管可能会部分堵塞孔道, 但对于甲醇分解为CO 和H2, Ru/m-TiO2-CeO2的催化活性依然远高于Ru/m-TiO2. Ru 和CeO2之间的相互作用对甲醇分解反应表现出协同效应.

关键词: 介孔二氧化钛, 铈, 钌, 甲醇分解, 催化剂载体

Abstract: Mesoporous TiO2-CeO2(m-TiO2-CeO2) was synthesized using n-cetylpyridinium chloride(C16PyCl) as a structure-directing agent under room temperature and neutral condition. The as-synthesized mesoporous samples were characterized by FT-IR, XRD, and N2 adsorption methods. The incorporation of Ce4 + ions into the channel wall dramatically improves the mesoporous structure. After ruthenium loaded by the impregnating method, the Ru particles strongly interact with the mesoporous mixed supports. Although a fairly large part of the particles are considered to be confined in the blind pores, the catalytic activity of ruthenium supported on m-TiO2-CeO2 for methanol decomposition to carbon monoxide and hydrogen is significantly higher than that of ruthenium supported on m-TiO2. A synergistic effect between Ru and CeO2 was observed for promoting the catalytic properties of Ru.

Key words: Mesoporous titaniumoxide, Cerium, Ruthenium, Methanol decomposition, Catalyst support