METHOD OF PREPARING PLATINUM-RUTHENIUM ELECTROCATALYSTS Russian patent published in 2012 - IPC B01J21/18 B01J23/42 B01J23/46 B82B3/00 B01J37/03 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of preparing electrocatalysts. Described is a method of preparing platinum-ruthenium electrocatalysts which are finely dispersed platinum-ruthenium alloy nanoparticles with atomic ratio of metals from 1:4 to 4:1 with total content thereof on a support from 15 to 70 wt %, said nanoparticles being deposited on the surface of a porous carbon support and said method involving co-deposition of hydroxo-chloride complexes of platinum and ruthenium on the surface of the carbon support with neutralisation of suspension thereof in aqueous solution of H₂PtCl₆ and RuCl₃ to pH=5.5-7.0 via gradual addition of an alkaline agent for more than 40 minutes, with moderate heating to temperature 55-70°C, followed by ageing the adsorbed metal compounds at pH=5.5-7.0, partial liquid-phase reduction thereof with an organic reducing agent and final gas-phase reduction in a hydrogen current at 150-250°C.

EFFECT: highly active electrocatalyst is obtained.

2 cl, 6 tbl, 1 dwg, 21 ex