abstract |
[PROBLEMS] To provide a method for improving the properties of a catalyst, the activity of which is significantly improved over that of a base catalyst, and the overall yield of a reaction product is also greatly improved. (A) Empirical formula of base composition: A a D b E c X d O e , wherein A is selected from Mo and W; Is selected from V and Ce, and E is Te, Sb and S e is selected from X, and X is selected from Nb, Ta, etc .; a = 1, b = 0.01-1.0, c = 0.01-1. 0, d = 0.01-1.0, and e is dependent on the oxidation state of the other elements), providing (b) at least one on the catalyst Depositing a dopant metal to improve the performance of the catalyst. |