Doped hexa-aluminate oxide catalyst, preparation method and its application

The present invention provides a kind of doped hexa-aluminate oxide catalyst, preparation method and its applications.Doped hexa-aluminate oxide catalyst, the general formula of catalyst is Re 0.8 Zr x M A Ni 1‑ A Al 11 O 19‑δ , wherein, Re is La or Sr, M Co, Fe, Mn or Cu, 0≤x≤0.2,0≤A≤1.Since M, Ni, Zr and rare-earth metal La etc. are introduced into hexa-aluminate lattice, by the content for controlling each element, the advantages of making transition metal, rare earth element and hexa-aluminate, is not fully exerted, improve catalytic performance and stability of the hexa-aluminate oxide catalyst in methane and carbon dioxide reforming reaction, the temperature of reforming reaction can be reduced, thereby reduces energy consumption and equipment requirement；Above-mentioned catalyst can be prepared using solwution method commonly used in the prior art and high-temperature roasting method simultaneously, therefore simplify preparation process, cost be reduced, suitable for industrial application.