Patent ID: 6815391
Filing Date: 2004-11-09
Classification: B01J,H01M,Y02E

Abstract:
A method for preparing a nano-level Pt/C electrocatalyst for cathode of a fuel cell, comprising the following steps:(1) dispersing active carbon in a mixed solvent, said solvent comprising organic solvent and deionized water, to form a suspension, wherein the content of active carbon in the mixed solvent is between about 0.1 g/L and about 1 g/L; (2) adding an aqueous solution of an anchoring agent into the suspension obtained in step (1) thereby obtaining a mixture to make the anchoring agent adsorbed on the active carbon; (3) adding chloroplatinic acid solution into the mixture obtained in step (2) to allow chloroplatinic acid adsorbed on the active carbon, wherein the concentration of the chloroplatinic acid solution is between about 0.1 g/L and about 1 g/L based on the weight of platinum, and wherein the mole ratio of the anchoring agent to the chloroplatinic acid is in the range of 3:1 to 6:1; and (4) adding a reducing agent, thereby yielding platinum particles after reduction to obtain Pt/C electrocatalyst, wherein the temperature of reduction is between about 0 and about 80Â° C.