METHOD OF PREPARING CRYSTALLINE MOLYBDENIUM-COBALT ALLOY THIN FILM USING ELECTRODEPOSITION

摘要

A method of preparing a Mo-Co alloy thin film with excellent catalytic activity efficiently in mild conditions is provided. A method of preparing a molybdenum-cobalt alloy(Co2Mo3) thin film by electrodeposition comprises: immersing a counter electrode and a working electrode into an aqueous acidic solution with a pH of 3 to 6 containing a complexing agent, a cobalt salt and molybdic acid((NH4)6Mo7O24+85%MoO3) that respectively have concentrations of 10 to 200 mM; and impressing a voltage of -1.0 to -1.5 V to both electrodes at a temperature of 0 to 80 deg.C to form a Mo-Co alloy thin film on the working electrode. The complexing agent is citric acid. The aqueous acidic solution is prepared by mixing an aqueous complexing agent solution, an aqueous cobalt salt solution and an aqueous molybdic acid solution. The cobalt salt is selected from the group consisting of cobalt nitrate(Co(NO3)2), cobalt acetate(Co(C2H3O2)3), cobalt sulfate(CoSO4) and cobalt chloride(CoCl2). The working electrode and the counter electrode are substrates respectively selected from the group consisting of titanium(Ti), nickel(Ni), molybdenum(Mo), cadmium(Cd), platinum(Pt), gold(Au), Indium-Tin-Oxide(ITO) coated glass, stainless steel, and carbon substrate.