期刊
APPLIED CATALYSIS A-GENERAL
卷 435, 期 -, 页码 141-147出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2012.05.045
关键词
WO3/ZrO2 catalysts; Tungsten precursor; Oxidative lactionzation; H2O2
资金
- Major State Basic Resource Development Program [2012CB224804]
- NNSFC [20973042, 21173052]
- Research Fund for the Doctoral Program of Higher Education [20090071110011]
- Natural Science Foundation of Shanghai Science and Technology Committee [08DZ2270500]
A series of tungsten oxide supported on commercial ZrO2 was synthesized via a traditional impregnation method using ammonium tungstate, phosphotungstic acid hydrate and tungstic acid-oxalic acid complex as the tungsten precursors. The supported catalysts were characterized by XRD, UV-vis DRS, Raman and XPS. It was found that the tungsten precursor and the calcination temperature were crucial to the dispersion and the nature of the tungsten species on ZrO2. The catalytic performances of the catalysts were investigated in the oxidative lactonization of 1,2-benzenedimethanol to phthalide with H2O2. The excellent catalytic performance of the catalyst prepared by calcination at 823 K after using tungstic acid-oxalic acid complex as the tungsten precursor was attributed to the presence of polymeric WO6 units. (c) 2012 Elsevier B.V. All rights reserved.
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