(US4716087-A)      Pt-Cu electrocatalyst consists of an alloy contg. 15-50 atom.% Cu and 85-50 atom.% Pt well dispersed in a carrier.    Pref. the carrier is C black, acetylene black, graphite, or W carbide. The electrocatalyst pref. contains 0.1-30 wt.% of the alloy.    USE/ADVANTAGE -   Useful in electrodes for acid-electrolyte fuel cells. The electrocatalyst has a high activity and is stable. There is improved specific surface area, maintainability of the supported metal. (8pp)d    (DE3643332-C)      Platinum-copper-alloy electrocatalyst (I) for acid-electrolyte fuel cell cathodes, comprises a platinum-copper alloy (II) comprising a solid soln contg 15-50 atom% copper and 85-50 atom% platinum, applied on a support of conductable carbon black.    Pref the amt of applied (II) is 5-15%, based on the total wt of (I). Pref (II), in its form applied on the support has a specific surface of at least 60 m2/g. Pref the support has a specific surface (BET) of 60-250 m2/g and a particle size of 0.1-50 mcirons.    Also new is an electrode for acid-electrolyte fuel cells in which (I) is supported by a conducting and acid-resistant support. Pref an acid-resistant, water-resistant binder, esp polytetrafluoroethylene, polyfluoroethylene-propylene or trifluoroalkoxy polyethylene, is used to fix (I) on the support.    ADVANTAGE -   New electrocatalyst is stable and highly active. (11pp)    (JP93010979-B)      Pt-Cu allloy electrode catalyst is prepd. by dispersing Pt-Cu alloy comprising 15-50 atomic % of Cu and Pt in conductive support. Prefered materials used as conductive support are conductive carbon black, acetylene black, graphite and tungsten carbide, etc. Pt cpds. used to prepare the catalyst are H2(PtCl6) H2(PtCl4) and H2Pt(OH)6, etc. and Cu cpds. are CuCl, CuCl2, CuNO3 and CuSO4, etc.    Pref. the support specific surface area is of 60-250 m2/g, particle size is 0.1-50 micron and electric conductivity is under 100 ohm-cm (0.3 phm-cm).    Electrode for fuel cell using acid electrolyte comprises Pt-Cu alloy electrode catalyst and conductive and acid proof material supporting the electrode catalyst.    USE/ADVANTAGE -   Used as electrode of fuel cell using acid electrolyte. The catalyst has high activity and is stable for a long period. (J62269751-A)