METHOD FOR PRODUCTION OF PLATINUM-CONTAINING CATALYSTS FOR FUEL CELLS AND ELECTROLYZERS Russian patent published in 2022 - IPC B01J23/42 B01J23/46 B01J21/18 B01J37/16 B01J37/34 B01J37/03 B01J35/02 B01J35/10 B82B3/00 B82Y30/00 B82Y40/00 

FIELD: composite materials.

SUBSTANCE: invention relates to a technology for the manufacture of composite materials containing platinum nanoparticles and its alloys, used as anode and cathode in electrolyzers and fuel cells with proton-exchange membrane. A method for the production of platinum-containing catalyst is carried out by the formation of platinum nanoparticles during chemical reduction of metal compounds in a liquid reaction medium under the impact of ultraviolet irradiation, while the reaction medium contains a carbon carrier, as which carbon dispersed materials with a specific surface of more than 50 m²/g are used, a solvent – ethylene glycol, a reducing agent, a platinum precursor – an aqueous solution of chloroplatinic acid hexahydrate, as well as an aqueous solution of an alkaline agent, and the ultraviolet irradiation is carried out during 30-180 min before the beginning of chemical reduction or in the process of chemical reduction at a temperature from 20 to 160°C.

EFFECT: resulting catalysts Pt/C and PtRu/C are characterized by uniform distribution of metal nanoparticles (with narrow size dispersion and controlled size from 1 to 4 nm) along the surface of the carrier, conditioned by the impact on the reaction mixture of ultraviolet radiation, which allows for an increase in the area of an electrochemically active surface of catalysts up to 40% compared to Pt/C and PtRu/C produced without ultraviolet irradiation.

1 cl, 3 dwg, 2 tbl, 18 ex