NOVELTY - Iron-cobalt hybrid catalyst prepared by process comprising: (a) reacting ethyleneamine with cobalt-containing precursor to form cobalt-containing complex; (b) combining the complex with electroconductive carbon supporting material; (c) heating the complex and carbon supporting material to get cobalt-containing catalyst support; (d) polymerizing aniline in presence of the catalyst support and iron-containing compound to form cobalt-containing, iron-bound polyaniline species; and (e) subjecting the polyaniline species to conditions to produce iron-cobalt hybrid catalyst, is claimed.    USE - The iron-cobalt hybrid catalyst is useful: in an electrode; an electrochemical fuel cell (all claimed); and for oxygen reduction reactions.    ADVANTAGE - The catalyst has improved catalytic activity and durability.    DETAILED DESCRIPTION - Iron-cobalt hybrid catalyst prepared by a process comprising: (a) reacting an ethyleneamine with a cobalt-containing precursor to form a cobalt-containing complex; (b) combining the cobalt-containing complex with an electroconductive carbon supporting material; (c) heating the cobalt-containing complex and carbon supporting material under conditions suitable to convert the cobalt-containing complex and carbon supporting material into a cobalt-containing catalyst support; (d) polymerizing an aniline in the presence of the cobalt-containing catalyst support and an iron-containing compound under conditions suitable to form a supported, cobalt-containing, iron-bound polyaniline species; and (e) subjecting the supported, cobalt-containing, iron bound polyaniline species to conditions suitable for producing a iron-cobalt hybrid catalyst, is claimed. INDEPENDENT CLAIMS are also included for:    (1) a method of catalyst synthesis comprising: providing an ethyleneamine-cobalt-carbon support by (a1) combining a cobalt-containing precursor, an ethyleneamine, and carbon black and a first suitable solvent to produce a suspension, (b1) evaporating the solvent from the suspension to form an intermediate mixture, (c1) heating the intermediate mixture in an inert atmosphere, and (d1) acidifying to form a first mixture; providing a polyaniline-iron complex by combining an iron-containing precursor with a polyaniline compound in a second suitable solvent to produce a second mixture; combining the first mixture with the second mixture to produce a third mixture; heating the third mixture in an inert atmosphere to a first temperature; subsequently acidifying the third mixture; and subsequently re-heating the third mixture to a second temperature to anchor the polyaniline-iron complex to the ethyleneamine-cobalt-carbon support; and    (2) a catalyst support comprising a reaction product of an ethyleneamine, a cobalt-containing precursor, and an electroconductive carbon compound, where the ethyleneamine is diethylenetriamine.