EXHAUST GAS CATALYST

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Catalyst composition represented by the general formula REVO/S wherein RE is at least one of the group of rare earth metals Y, Ce, Pr, Nd, Sm, Gd, Tb, Dy , Er and Yb in an amount of up to 6.0 wt.-%; V is vanadium in an amount of 0.2 - 2.5 wt.-%; O is oxygen in an amount of up to 3, 5 wt.-%; and S is a support containing TiO2 in an amount of at least 70 wt.-%, with the rest being WO3 a nd optionally SiO2. This catalyst composition shows high removal efficiencies f or NOx even after aging at 750~C.