Metal oxidation catalysts refer to catalysts containing metal oxides, which are widely used in a variety of chemical reactions, especially in catalytic oxidation, reduction, cracking and other processes. Metal oxidation catalysts are usually composed of transition metal oxides (such as titanium dioxide TiO₂, chromium dioxide Cr₂O₃, molybdenum oxide MoO₃, etc.) or rare earth metal oxides (such as cerium oxide CeO₂, lanthanum oxide La₂O₃, etc.). They can effectively reduce the activation energy of the reaction and increase the reaction rate in the catalytic reaction, and have good selectivity and stability.