METHOD OF PREPARING NANOCRYSTALLINE COBALT METAL THIN FILM USING ELECTRODEPOSITION

摘要

A method of preparing a large sized-nanocrystalline cobalt metal thin film with excellent catalytic activity in mild conditions is provided. A method of preparing a cobalt metal thin film by electrodeposition comprises: immersing a counter electrode and a working electrode into an aqueous solution that has a pH of 4 to 5 and contains a cobalt salt with a concentration of 10 to 500 mM; and impressing a voltage of -0.7 to -1.3 V to both electrodes at a temperature of 0 to 40 deg.C to form a Co metal thin film on the working electrode. 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.