# US 2025/0158084 A1 · Platinum-rhenium alloy catalyst, preparation method, and fuel cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0158084 A1 - Document ID: US20250158084A1 - Status: Published application - Kind: A1 - Application number: 18/762,779 - Filed: 2024-07-03 - Published: 2025-05-15 - Earliest claimed: 2023-11-10 - Assignees: China University of Petroleum-Beijing - Applicants: China University of Petroleum-Beijing - Inventors: Guoyong HUANG; Chunxia WANG; Jian CUI; Maolin TIAN; Jiawei WEN; Fengshan YU - Web page: https://patentgrep.com/patent/US20250158084A1 ## CPC - H01M 4/926: {on carbon or graphite} - H01M 4/921: {Alloys or mixtures with metallic elements} - H01M 2004/8689: {Positive electrodes} - Y02E 60/50: Fuel cells - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A platinum-rhenium alloy catalyst preparation method includes the following steps: (1) dispersing a carbon carrier, a platinum source and an alkaline substance in ethylene glycol for microwave reaction, acidizing and depositing the solution after the reaction is finished, washing with water, and drying to obtain a Pt/C precursor; (2) dispersing the Pt/C precursor, a phosphorus source and a rhenium precursor in water, carrying out ultrasonic treatment, drying by distillation after treatment, and grinding to obtain a platinum-rhenium alloy catalyst precursor; and (3) calcining the platinum-rhenium alloy catalyst precursor in an inert atmosphere, and grinding after the calcining to obtain a platinum-rhenium alloy catalyst. The platinum-rhenium alloy catalyst is prepared through a two-step method, rhenium and platinum are alloyed through high-temperature pyrolysis of the phosphorus source, thus solving the problem that simultaneous reduction is difficult due to the reduction potential difference of platinum and rhenium. ## Claims ### Claim 1 A method for preparing platinum-rhenium alloy catalyst, comprising the following steps: (1) dispersing a carbon carrier, a platinum source and an alkaline substance in ethylene glycol for microwave reaction, acidizing and depositing the solution after the reaction is finished, washing with water, and drying to obtain a Pt/C precursor; (2) dispersing the Pt/C precursor, a phosphorus source and a rhenium precursor in water, carrying out ultrasonic treatment, drying by distillation after the ultrasonic treatment, and grinding to obtain a platinum-rhenium alloy catalyst precursor; and (3) calcining the platinum-rhenium alloy catalyst precursor in an inert atmosphere, and grinding after treatment to obtain the platinum-rhenium alloy catalyst. ### Claim 2 (depends on 1) The preparation method of platinum-rhenium alloy catalyst according to claim 1, wherein: the carbon carrier is carbon black, preferably at least one of Vulcan XC-72R, EC-300J, EC-600J, and BP2000; the platinum source is at least one of chloroplatinic acid, potassium chloroplatinate, sodium chloroplatinate, and platinum acetylacetonate; the alkaline substance is at least one of sodium hydroxide, potassium hydroxide, and ammonia water; a molar ratio of the platinum source to the alkaline substance is 1:(20-110); a volume ratio of the total mass of the carbon carrier, the platinum source and the alkaline substance to the ethylene glycol is (2 to 20) mg:1 mL; a power of the microwave reaction is 600-900 W, the temperature is 130° C.-190° C., and the time is 2 min-30 min. ### Claim 3 (depends on 1) The method for preparing platinum-rhenium alloy catalyst according to claim 1, wherein: in the step of acidizing and depositing, an acid is added to the solution to adjust the pH value of the solution to 2 to 4; the acid is at least one of dilute hydrochloric acid, dilute nitric acid, and dilute sulfuric acid; a time of the acidizing and depositing is 5 to 24 hours. ### Claim 4 (depends on 1) The method for preparing platinum-rhenium alloy catalyst according to claim 1, wherein: the phosphorus source is at least one of phosphoric acid, sodium hydrogen phosphate, sodium dihydrogen phosphate, and sodium hydrogen hypophosphite; the rhenium precursor is at least one of perrhenic acid, sodium perrhenate, rhenium trichloride, and rhenium oxide; and a molar ratio of the phosphorus source to the rhenium precursor is 1:(0.1-2). ### Claim 5 (depends on 1) The method for preparing platinum-rhenium alloy catalyst according to claim 1, wherein: a volume ratio of the total mass of the Pt/C precursor, the phosphorus source and the rhenium precursor to water is (5-30) mg:1 mL; a power of the ultrasonic treatment is 500-1000 W, and a time of the ultrasonic treatment is 30-120 minutes. ### Claim 6 (depends on 1) The method for preparing platinum-rhenium alloy catalyst according to claim 1, wherein: the inert atmosphere is nitrogen, argon or a hydrogen-argon mixture; conditions for the calcinating treatment are as follows: the temperature is raised to 600-1100° C. at a heating rate of 2-5° C./min, and held for 1-4 hours. ### Claim 7 (depends on 1) The method for preparing platinum-rhenium alloy catalyst according to claim 1, wherein: based on the total amount of the platinum-rhenium alloy catalyst, a total mass percentage of platinum and rhenium metal is 10% to 40%. ### Claim 8 (depends on 1) The method for preparing platinum-rhenium alloy catalyst according to claim 1, wherein: in the platinum-rhenium alloy catalyst, the molar ratio of platinum to rhenium is (1-3):1. ### Claim 9 (depends on 1) A platinum-rhenium alloy catalyst prepared by the method for preparing platinum-rhenium alloy catalyst according to claim 1. ### Claim 10 (depends on 9) A hydrogen fuel cell, comprising a cathode, an anode and an electrolyte, wherein: the cathode comprises the platinum-rhenium alloy catalyst of claim 9.