Ceramic catalyst with bionic structure as well as preparation method and application of ceramic catalyst

The invention provides a ceramic catalyst with a bionic structure. The ceramic catalyst with the bionic structure comprises mesophyll, vein and epidermis structures, the mesophyll is a main body structure and is composed of one of a perovskite structure, a double perovskite structure or a Ruddlesden-Popper structure; the'vein 'is of a network-shaped structure located in the'mesophyll', the'skin 'is a coating layer located on the surface of the'mesophyll', and the'vein 'and the'skin' are of a cubic fluorite structure or a perovskite structure. The'epidermis' structure located on the'mesophyll 'surface has abundant oxygen vacancies, which is beneficial to the processes of oxygen adsorption, dissociation, crystal lattice entering and the like in the oxygen catalysis process. And the network-shaped leaf vein structure in the mesophyll provides a rapid channel for oxygen ion conduction, so that the catalyst has excellent oxygen ion conduction capability.