Doped non-noble metal compound used as CO oxidation catalyst and preparation method of doped non-noble metal compound

The invention relates to the field of doped non-noble metal catalysts and heterogeneous catalysis, and provides a doped non-noble metal compound serving as a CO oxidation catalyst and a preparation method. Comprising cerium salt, transition metal salt and a block copolymer, the molar ratio of the transition metal salt to the cerium salt is (0.01-4): 1. The preparation method of the catalyst comprises the following steps: atomizing a mixed solution of cerium salt, transition metal salt and the block copolymer to obtain micro-droplets, introducing the micro-droplets into a high-temperature tubular furnace for pyrolysis, carrying out further heat treatment on the obtained product powder, and removing the residual block polymer to obtain the final product. A series of doped non-noble metal compound catalysts are obtained by changing synthesis conditions such as transition metal salt types, the ratio of transition metal salt to cerium salt, heat treatment temperature and the like. Compared with a pure-phase CeO2 c