Coralline platinum-copper alloy nano-particle and preparing method thereof

The embodiment of the invention provides a preparing method of a coralline platinum-copper alloy nano-particle. The preparing method includes the following steps that (1) a mixed aqueous solution containing chloroplatinate, soluble copper salt and a surface active agent is prepared, wherein the surface active agent is cetyltrimethylammonium chloride; and (2) a reducing agent is added into the mixed aqueous solution, the mixed aqueous and the reducing agent are stirred in a water bath at the temperature of 60 DEG C to 90 DEG C to react for 1 hour to 3 hours, after the reaction is finished, a solution obtained after the reaction is subject to centrifugation, liquid supernatant is removed, a solid product is obtained, and the coralline platinum-copper alloy nano-particle is obtained after the solid product is washed. The preparing method is simple in process, soft in reaction condition, short in reaction time and low in cost; and the obtained coralline platinum-copper alloy nano-particle is quite uniform in size