ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 55, Number 1
JKCSEZ 55(1)
February 20, 2011 

V_0.9Sb_0.1O_x systems, bulk and deposited on different supports (five types of γ-aluminas, α-alumina, silica-alumina, silica gel, magnesium oxide), have been tested in the oxidative dehydrogenation (ODH) of iso-butane. Catalytic performance of VSb oxides has shown to be highly dependent on the support and the nature of the support decreasing in a series: γ-Al₂O₃ > α-Al₂O₃ > Si-Al-O > SiO₂ ? MgO >> unsupported. Variation of the V-Sb-O-loading in the studied range of coverage (0.5-2 theoretical monolayer) only slightly influences the catalysts’ activity and selectivity. The best catalytic performance of γ-alumina-supported V_0.9Sb_0.1O_x systems can be explained by the optimal surface interaction between support and supported components resulting in the formation of well-spread amorphous active VO_x-component with vanadium in a high oxidation state.