Mn-doped mesoporous LaCoO3 perovskite type catalyst and preparation method thereof

The invention belongs to the technical field of automobile exhaust purification catalysis, and in particular relates to a Mn-doped mesoporous LaCoO3 perovskite type catalyst prepared by using a template method, and a preparation method and application of the catalyst. The preparation method uses SBA-15 as a temperature and citric acid as a metal ion complexant; the method comprises the steps of evenly dissolving the citric acid, lanthanum nitrate, cobalt nitrate and manganous nitrate into an ethanol aqueous solution; after metal ions are fully complexed with citric acid, adding the SBA-15, stirring for evaporation until a wet gel state, drying into dry gel and then grinding and calcining, washing and drying to obtain the mesoporous perovskite type catalyst. The LaCoO3 perovskite type catalyst prepared by the method is large in specific surface area, good in low temperature CO catalytic activity, easy in obtaining of the raw materials, and low in cost; the preparation process is simpleand easy to operate. 本发明属