Application of ammonia intermittent temperature-programmed desorption to evaluate surface acidity of tungsten oxide supported on activated carbon

被引：9
|
作者：
Alvarez-Merino, MA
Joly, JP
Carrasco-Marín, F
Moreno-Castilla, C [1 ]
机构：
[1] Univ Granada, Fac Ciencias, Dept Quim Inorgan, Granada, Spain
[2] Univ Jaen, Dept Quim Inorgan & Organ, Jaen 23071, Spain
[3] Univ Lyon 1, CNRS, UMR 5634, Lab Applicat Chim Environm, F-69622 Villeurbanne, France
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2003年 / 260卷 / 02期
关键词：
tungsten oxide catalysts; carbon support; surface acid strength;
D O I：
10.1016/S0021-9797(02)00253-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Intermittent temperature-programmed desorption of ammonia was used to study the strength and population of surface acid sites of tungsten oxide supported on activated carbon pretreated at 350 and 700 degreesC. Catalysts pretreated at 350 degreesC showed two types of surface acid sites and desorption occurred with free readsorption until a temperature of around 300 degreesC was reached. Pretreatment at 700 degreesC produced three different states of ammonia adsorbed on the catalysts and desorption occurred with free readsorption. (C) 2003 Elsevier Science (USA). All rights reserved.
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页码：449 / 453
页数：5
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