Iron-based deoxidation catalyst as well as preparation method and application thereof

The invention relates to the technical field of catalyst preparation, and discloses an iron-based deoxidation catalyst and a preparation method and application thereof, the iron-based deoxidation catalyst comprises a carrier, and an active component and an auxiliary agent loaded on the surface of the carrier; the active components are an iron carbon compound and Fe3O4; the iron-carbon compound is one or two of Fe2C, Fe7C3, Fe5C2 and Fe2.2 C, and the iron-carbon compound is one or two of Fe2C, Fe7C3, Fe5C2 and Fe2.2 C; the auxiliary agent is one or more than two of oxides of K, Zn, Ce, Mg, Na and Zr. According to the iron-based deoxidation catalyst, a non-noble metal iron-based catalyst is used as a precursor, and the effective number of active phases on the surface of the iron-based catalyst is efficiently constructed by effectively controlling the content, the variety and the proportion of iron-carbon compounds on the surface of the catalyst, so that the activation of hydrogen is promoted; the activated H *