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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (22): 2082-2088. 上一篇    下一篇

研究论文

锌硅钼钨多元取代多金属含氧簇合物的合成、表征及其催化异丙醇气相反应的活性

华春燕1,2，李娟1,2，戴立益*,1,2，单永奎1   

  1. (1华东师范大学化学系 上海 200062)
    (2上海市分子催化和功能材料重点实验室 复旦大学化学系 上海 200433)
  • 投稿日期:2005-01-17 修回日期:2005-08-25 发布日期:2010-12-10
  • 通讯作者: 戴立益

Synthesis, Characterization of Zn-containing Tungstomolybdosilic Polyoxometalates and Their Catalytic Performancein Reaction of 2-Propanol

HUA Chun-Yan1,2, LI Juan1,2, DAI Li-Yi*,1,2, SHAN Yong-Kui1   

  1. (1 Department of Chemistry, East China Normal University, Shanghai 200062)
    (2 Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry,
    Fudan University, Shanghai 200433)
  • Received:2005-01-17 Revised:2005-08-25 Published:2010-12-10
  • Contact: DAI Li-Yi

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1144

被引次数

7

利用pH值的调变, 以H4SiMo12－nWnO40•(20～25)H2O (n＝2, 4, 6, 8, 10)和Zn(NO3)2饱和溶液为原料制得一系列锌硅钼钨多元取代多金属含氧簇合物, 通过IR, XRD, XPS等方法对合成的催化剂的结构和性质进行了表征, 并利用吡啶吸附红外及氨程序升温脱附分别测定样品表面的酸种类和酸强度. 考察了催化剂对异丙醇气相反应的活性, 同时详细研究了异丙醇气相反应产物分布与催化剂组成之间的关系.

关键词: Keggin结构, 多金属含氧簇合物, 异丙醇, 锌, 催化作用

Zn-containing derivatives of H4SiMo12－nWnO40 (n＝2, 4, 6, 8, 10) were prepared under different pH according to the variation of n and characterized by elemental analysis, IR spectra, X-ray diffraction and XPS. The acid kind and intensity of the polyoxometalates were investigated by Py-IR and NH3-TPD, respectively. The polyoxometalates were used as heterogeneous catalysts in tested gaseous reaction of decomposition of isopropanol. The relationship between catalytic activity of the polyoxometalates and their component was discussed.

Key words: Keggin structure, polyoxometalate, isopropanol, zinc, catalysis