Recent progress in diffuse reflectance spectroscopy of supported metal oxide catalysts

被引:172
作者
Weckhuysen, BM [1 ]
Schoonheydt, RA [1 ]
机构
[1] Katholieke Univ Leuven, Dept Interfasechem, Ctr Oppervlaktechem Katalyse, B-3001 Heverlee, Belgium
关键词
diffuse reflectance spectroscopy; chemometrics; quantitation; SIMPLISMA;
D O I
10.1016/S0920-5861(98)00458-1
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Diffuse reflectance spectroscopy is a suitable technique for studying heterogeneous catalysts, as both d-d and charge transfer transitions of supported transition metal ions can be probed. Within the past several years, new developments have resulted in a more detailed understanding of the surface chemistry of supported metal oxide catalysts. In this review, the fundamental advances of the use of diffuse reflectance spectroscopy in the field of heterogeneous catalysis will be discussed. It will be shown that (1) oxidation states can be spectroscopically quantified in well-defined conditions; (2) chemometrical techniques are crucial for an unbiased analysis of the spectra; (3) in situ spectroscopy, in combination with experimental design and on line catalytic measurements, allows the development of relevant structure-activity relationships, and (4) the reduction kinetics of supported metal oxides can be evaluated. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:441 / 451
页数:11
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