Fe monatomic catalyst Fe-PANI and preparation method thereof

The invention discloses a preparation method of a Fe monatomic catalyst Fe-PANI. The preparation method comprises the following steps: 1) pretreating a polyaniline carrier; polyaniline in a complete oxidation state or an intermediate oxidation state is directly used as a carrier; the polyaniline in the acid-doped state is used as a carrier after being subjected to alkali washing; (2) dipping the polyaniline carrier in a ferric salt solution or a ferrous salt solution or a mixed solution of ferric salt and ferrous salt, so that Fe atoms are coordinated with imine nitrogen atoms in polyaniline to be loaded on the surface of polyaniline; and 3) separating out the polyaniline carrier loaded with Fe atoms, washing the polyaniline carrier with deionized water, and drying to obtain the Fe monatomic catalyst Fe-PANI. The invention further relates to the Fe monatomic catalyst Fe-PANI prepared through the method, polyaniline serves as a carrier of the Fe monatomic catalyst Fe-PANI, and Fe monatomic atoms are stably loa