Method for preparing catalyst platinum supported on lithium cobalt oxide
View Patent ↗The present invention relates to a method for preparing catalyst platinum supported on lithium cobalt oxide for sodium borohydride hydrolysis. The catalyst with crystalline platinum is produced by mixing dihydrogen hexachloroplatinumate and black lithium-cobalt-oxide powder with the impregnation method, and then by a two-step sintering. Platinum is the major catalytic activity site, and lithium cobalt oxide is the support thereof. The manufacturing process of the present invention is simple, and can be applied to catalytic reactions or electrocatalytic reactions in fuel cells. Thereby, the present method is very practical to industry.
1. A method for preparing catalyst platinum supported on lithium cobalt oxide (Pt—LiCoO 2 ) with crystalline platinum for sodium borohydride hydrolysis, consisting of:
combining dihydrogen hexachloroplatinumate (H 2 PtCl 6 ), said dihydrogen hexachloroplatinumate (H 2 PtCl 6 ) being a metal salt solution, and black lithium-cobalt-oxide (LiCoO 2 ) powder to form a mixture;
stirring said mixture;
placing the dihydrogen hexachloroplatinumate (H 2 PtCl 6 ) and black lithium-cobalt-oxide (LiCoO 2 ) powder mixture into a supersonic vibrator for 30 minutes; and
sintering.
2. The method of claim 1 , wherein the sintering is two-step with a first sintering at 250° C. and then with a second sintering between 350° C. and 650° C.
3. The method of claim 2 , wherein the temperature of the second sintering is 450° C.