NOVELTY - A fuel cell catalyst comprises platinum, titanium and tungsten. The catalyst comprises either (atomic %): platinum (not more than 60), titanium (at least 20) and tungsten (at least 25); or platinum (70 - 85), titanium (2 - 12) and tungsten (2 - 12). The catalyst alternatively comprises an alloy of platinum, titanium and tungsten.    USE - In supported electrocatalyst powder for use in electrochemical reactor device; fuel cell electrode; fuel cell for the catalytic oxidation of a hydrogen-containing fuel, e.g. methanol or the catalytic reduction of oxygen; for the electrochemical conversion of a hydrogen-containing fuel, e.g. saturated hydrocarbon, garbage off-gas, oxygenated hydrocarbons and fossil fuels and oxygen to reaction products and electricity in a fuel cell; in fuel cell electrolyte membrane having an unsupported catalyst layer (claimed); in fuel cells for electrical utility power generation facilities; uninterrupted power supply devices; extraterrestrial vehicles, transportation equipments including heavy trucks, automobiles and motorcycles; residential power generation systems; mobile communications equipments including wireless telephones, pagers and satellite phones; mobile electronic devices including laptop computers, personal data assistant, audio recording and playback devices, digital camera, digital video camera, and electronic game playing devices; military and aerospace equipment including global positioning satellite devices and robots.    ADVANTAGE - The novel catalyst oxidizes the hydrogen-containing fuel and reduces oxygen. It exhibits favorable electrolytic activity while having reduced amounts of platinum as compared to platinum standard, and has improved corrosion resistance and activity.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a supported electrocatalyst powder for use in electrochemical reactor device comprising the above catalyst and electrically conductive support particles upon which the catalyst is dispersed.