TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Properties: The multi-component support material has electroconductivity of more than 0.01 S/cm, preferably more than 0.1 S/cm. The inorganic oxide is not electroconductive. Preferred Composition: The multi-component support material has core/shell structure. The inorganic oxide (1) is chosen from titanium dioxide, aluminum oxide, silicon dioxide, zirconium dioxide, yttrium oxide, cerium oxide, cerium dioxide, lanthanum oxide and tin dioxide. The conductive oxide (2) containing additive including element chosen from vanadium, niobium, tantalum and antimony, and/or additive including halide ion chosen from ion of fluorine and chlorine is chosen from ruthenium(IV) oxide, iridium(IV) oxide, tungsten oxide (WOx, where x is not defined), molybdenum oxide (MoOx), niobium oxide (NbOx), tantalum oxide (TaOx) tin oxide (SnOx) and titanium oxide (TiOx). The content of conductive oxide is 10-99 wt.%, preferably 20-95 wt.%, with respect to overall weight of the support material. The catalytic active species containing precious metal chosen from ruthenium, osmium, rhodium, iridium, palladium, platinum, silver and gold, and its alloy, preferably platinum and platinum alloy with ignoble metal chosen from vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc is in form of fine particles having average particle size of 1-100 nm. The content of catalytic active species is 5-60 wt.%, preferably 5-40 wt.%, with respect to overall weight of catalyst. The electrocatalyst comprises platinum/iridium oxide-titanium dioxide (Pt/IrOx-TiO2), platinum-cobalt/iridium oxide-titanium dioxide (PtCo/IrOx-TiO2), platinum/iridium oxide-aluminum oxide (Pt/IrOx-Al2O3), platinum/antimony-tin oxide-titanium dioxide (Pt/SbSnOx-TiO2), platinum-nickel/antimony-tin oxide-aluminum oxide (PtNi/SbSnOx-Al2O3), platinum/tantalum-tin oxide-titanium dioxide (Pt/TaSnOx-TiO2), platinum/niobium-tin oxide-titanium dioxide (Pt/NbSnOx-TiO2) and platinum/niobium-titanium oxide-titanium dioxide (Pt/NbTiOx-TiO2). Conductive oxide precursor used during manufacture of electrocatalyst is chosen from hexachloroiridium(IV) acid, iridium(III) chloride, iridium(III) nitrate, ruthenium(III) nitrosyl nitrate, ruthenium(III) acetate, ruthenium(III) acetylacetonate, tin(IV) chloride pentahydrate, tin acetate, tin(II) nitrate, antimony(III) chloride, antimony(III) nitrate, antimony(III) acetate, ammonium molybdate, sodium molybdate, ammonium tungstate, sodium tungstate, ammonium vanadate, ammonium-niobium(V) oxalate, ammonium-tantalum(V) oxalate and sodium vanadate. Metal precursor compound used during manufacture of electrocatalyst is halogen-free and/or low-halogen compound of precious metal and optional non-precious metal.