Catalyst, preparation method thereof and fuel cell

The present application relates to a catalyst comprising: an iron-containing porous carbon; the Pt nano-particles are arranged on the surface and inside the iron-containing porous carbon, and the iron-containing porous carbon is obtained after Fe-MOF is subjected to high-temperature carbonization. The catalyst provided by the embodiment of the invention comprises the iron-containing porous carbon and the Pt nano-particles, the iron-containing porous carbon is obtained by high-temperature carbonization of Fe-MOF, and the Pt nano-particles not only can be deposited on the surface of the Fe-MOF, but also can enter an MOF framework through MOF pore channels, so that packaging of the Pt nano-particles by the Fe-MOF is realized; after carbonization of Fe-MOF, the original porous structure of a metal organic framework is maintained, Fe active sites are also maintained, high catalytic performance can be shown after Pt nanoparticles are loaded, and under the condition that the platinum loading amount is reduced, the o