Infrared characterization of the surface intermediates in the oxidation of toluene on vanadyl pyrophosphate catalysts

被引：0
|
作者：
Ursula Bentrup
Andreas Martin
Bernhard Lücke
机构：
[1] Richard-Willstätter-Strasse 12,Institut für Angewandte Chemie Berlin
来源：
Topics in Catalysis | 2000年 / 11-12卷
关键词：
vanadyl pyrophosphate; toluene; partial oxidation; benzaldehyde; acidity; pyridine; acetonitrile; in situ FTIR spectroscopy;
D O I：
暂无
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学科分类号：
摘要：
The adsorption and reaction of toluene on vanadyl pyrophosphate catalysts was studied by in situ infrared spectroscopy. Strongly adsorbed benzaldehyde and physically adsorbed cyclic anhydride species were observed at temperatures above 523 K. Water formed during reaction generates acid hydroxyl groups which cause a stronger adsorption of benzaldehyde and consecutive oxidation reactions. By co-adsorption of pyridine the acid sites are blocked and the deeper oxidation is suppressed.
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页码：139 / 145
页数：6
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