▎ 摘　　要

NOVELTY - Preparing platinum-iridium (Pt-Ir) alloy catalyst loaded with three-dimensional carbon structure involves preparing three-dimensional carbon structure powder by mixing 0.5-1.5 pts. wt. zero-dimensional carbon material, 0.5-1.5 pts. wt. one-dimensional carbon material, 0.5-1.5 pts. wt. two-dimensional carbon material and 1-10 pts. wt. carbon black, dissolving in 20-100 pts. wt. 10 wt.% nitric acid solution, stirring for 5-10 hours at 60-80degrees Celsius, washing and filtering obtained mixture with water, drying for 5-10 hours at 60-80degrees Celsius, and ball-milling the dried product for 1-2 hours at 250-400 revolutions/minute (rpm) to obtain three-dimensional carbon structure powder. USE - Method for preparing platinum-iridium alloy catalyst loaded with three-dimensional carbon structure for fuel cell catalyst used in electrochemical energy conversion and storage systems such as fuel cells, water electrolyzer and batteries. ADVANTAGE - The platinum-iridium alloy catalyst loaded with three-dimensional carbon structure has low toxicity, high activity, high stability, and high activity. DETAILED DESCRIPTION - Preparing platinum-iridium (Pt-Ir) alloy catalyst loaded with three-dimensional carbon structure involves preparing three-dimensional carbon structure powder by mixing 0.5-1.5 pts. wt. zero-dimensional carbon material, 0.5-1.5 pts. wt. one-dimensional carbon material, 0.5-1.5 pts. wt. two-dimensional carbon material and 1-10 pts. wt. carbon black, dissolving in 20-100 pts. wt. 10 wt.% nitric acid solution, stirring for 5-10 hours at 60-80degrees Celsius, washing and filtering obtained mixture with water, drying for 5-10 hours at 60-80degrees Celsius, and ball-milling the dried product for 1-2 hours at 250-400 revolutions/minute (rpm) to obtain three-dimensional carbon structure powder. The synthesis, loading and uniform dispersion of Pt-Ir alloy on three-dimensional carbon structure is carried out by weighing 1.8 pts. wt. three-dimensional carbon structure, 2.25-13.5 pts. wt. 6-hydroxyl platinum acid diethanolamine ((HOCH2CH2NH3)2(Pt(OH)6)), 14.7 pts. wt. sodium citrate dihydrate (C6H5Na3O72H2O), 0.7-5 pts. wt. iridium chloride (IrCl3), 3.8 pts. wt. sodium borohydride and 1 pts. wt. formic acid (HCOOH), dissolving iridium chloride and sodium citrate dihydrate in deionized water, stirring continuously for 15-30 minutes, adding sodium borohydride dropwise, adding 30 wt.% hydrogen peroxide dropwise at 90degrees Celsius, refluxing in argon atmosphere for 2-3 hours, adding hexahydroxyplatinum acid bis(ethanolammonium) and formic acid at 160degrees Celsius, and refluxing in argon atmosphere for 2-3 hours for obtaining Pt-Ir alloy catalyst. The obtained Pt-Ir alloy catalyst and three-dimensional carbon structure powder are dispersed and mixed in the solution, and stirred overnight. The obtained reaction solution is filtered, washed, and dried to constant weight. The obtained solution is subjected to suction filtration, washed with water and dried in a vacuum at 60-80degrees Celsius for 5-10 hours. The obtained powder is ground, where hydrogen gas accounts for 0-20 vol.% of the total gas, i.e. sum of hydrogen gas and nitrogen gas, and volume ratio of nitrogen gas is 0-20 vol.%, annealing is performed in an atmosphere with gas flow rate of 80-100 standard cubic centimeters per minute (sccm) for 1-3 hours, and annealing temperature is 150-400degrees Celsius. The plasma-enhanced chemical vapor deposition system (PECVD) is used to perform constant temperature plasma treatment on annealed powder. The powder is placed in a rotatable ceramic crucible, and crucible is fixed by a rotating rod, and nitrogen and hydrogen gases are introduced, where radio frequency power is 150 watts (W), holding temperature is 300-500degrees Celsius, and plasma treatment time is 1-3 hours.