It is shown that by influence on catalytic activity of Sb oxide systems the carriers are arranged  in the following order: γ-Al₂O₃ > α-Al₂O₃>Si–Al–O>SiO₂ ≈ MgO. As is indicated in the  studied conditions (0.5–2 monolayer) change of a loading degree of V–Sb–O  slightly  influences on activity and selectivity of a catalyst. The best catalytic activity of V_0.9Sb_0.1O_x (γ-Al₂O₃) is explained by optimum interaction between a carrier surface and deposited components