Iron-nickel co-doped perovskite type catalyst and preparation method thereof

The invention discloses an iron-nickel co-doped perovskite type catalyst and a preparation method thereof, and the preparation method comprises the following steps: (1) stirring and mixing a calcium salt, a titanate compound, a nickel metal salt hydrate, an iron metal salt hydrate and citric acid, dissolving in deionized water, and continuously stirring to obtain sol; and (2) drying the sol obtained in the step (1), grinding, carrying out heat treatment, and cooling to obtain the composite material. The preparation method is simple and easy to operate, and large-area popularization and application are easy. Iron and nickel are added as co-doping elements in the process of a sol-gel method, the carbon dioxide conversion performance of perovskite is promoted, hydrogen is introduced for reduction treatment, dissolved calcium carbonate is synthesized, and the catalytic performance of the catalyst is further improved. The prepared catalyst is high in yield and stable in chemical property, has the properties of uni