Preparation method of rhodium-ruthenium binary metal oxide for anode of PEM electrolytic cell

The invention discloses a preparation method of a rhodium-ruthenium binary metal oxide for a PEM electrolytic cell anode. The preparation method specifically comprises the following steps: constructing rhodium-ruthenium binary metal oxide nanoparticles from bottom to top through an impregnation reduction method; the uniform particle size of the element precursor is kept in the high-temperature reduction step through the constraint of the structural aid carbon black; an electron assistant Rh and a main element Ru are introduced to form a binary metal oxide, and crystal lattices of the nanoparticles are stabilized while the electronic structure of the Ru species is optimized. According to the preparation method, the OER performance of the Ru-based electrode material is exerted to the maximum extent, meanwhile, the stability of the Ru-based electrode material is maintained, the Ru-based electrode material can serve as a PEM-WE anode to be used for commercial hydrogen production, the advantages of being low in en