METHOD FOR PRODUCING A BIMETALLIC ELECTROCATALYST BASED ON PLATINUM NUCLEI Russian patent published in 2022 - IPC B01J21/18 B01J23/42 B01J23/72 B01J23/75 B01J23/755 B01J23/89 B01J37/34 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method for producing a bimetallic catalyst with an inhomogeneous composition of nanoparticles, which can be used in low-temperature fuel cells and electrolyzers. At the first stage of synthesis, nuclei nanoparticles are formed of platinum with a size from 1.1 to 2.5 nm with a narrow dimensional distribution. Platinum nuclei nanoparticles are the centers of crystallization of future Pt-M, where M = Ni, Co or Cu of the nanoparticles evenly distributed over the surface of the carrier. Then, d-metal and platinum ions are reduced on the surface of Pt nuclei by introducing a platinum precursor into the reaction mixture, d-metal precursors: Cu, Co, Ni d-metal salts, with the addition of a reducing agent.

EFFECT: creating a simple and fast method for producing bimetallic catalysts PtCu/C, PtCo/C and PtNi/C with a heterogeneous composition of bimetallic NPs formed on the basis of platinum nuclei on the surface of a carbon or another carrier, which makes it possible to significantly increase the mass (241-750 A/g) and specific (5.2 – 17.0 A/m²) activity of the catalyst in the oxygen reducing reaction, as well as to increase the stability of the catalyst during operation (>80%) compared with Pt/C catalysts, analogues of HiSPEC3000-20 wt. % Pt and HiSPEC4000- 40 wt. %.

1 cl, 2 tbl, 18 ex, 6 dwg