Vanadium supported on hexagonal mesoporous silica:: active and stable catalysts in the oxidative dehydrogenation of alkanes

被引：26
|
作者：
Knotek, Petr [1 ]
Capek, Libor [1 ]
Bulanek, Roman [1 ]
Adam, Jiri [1 ]
机构：
[1] Univ Pardubice, Fac Chem Technol, Dept Chem Phys, CZ-53210 Pardubice, Czech Republic
来源：
TOPICS IN CATALYSIS | 2007年 / 45卷 / 1-4期
关键词：
hexagonal mesoporous silica; VOx species; oxidative dehydrogenation; propane;
D O I：
10.1007/s11244-007-0239-2
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Hexagonal mesoporous silica (HMS) catalysts post-synthetically doped with vanadia oxo-species were characterized by means of XRD, UV-Vis spectroscopy, H(2)-TPR and studied in oxidative dehydrogenation of propane (ODH). The relationship between catalytic activity in ODH and the presence of different vanadia-oxo species (monomeric, oligomeric and oxide-like species) was suggested. Monomeric VOx species are responsible for high catalytic activity and selectivity, oligomeric species containing V-O-V bond are active but non-selective to propene and oxide-like VOx particles are significantly less active and selective.
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页码：51 / 55
页数：5
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