Fuel cell cathode catalyst, preparation method thereof, membrane electrode and fuel cell
A fuel cell cathode and catalyst technology, applied in fuel cells, battery electrodes, electrochemical generators, etc.
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[0032] Therefore, the present invention provides a method for preparing a fuel cell cathode catalyst, which improves the catalytic activity of the fuel cell cathode catalyst by improving the dispersion uniformity of platinum alloy nanoparticles on a carbon carrier.
[0033] See figure 1 , the preparation method of fuel cell cathode catalyst of one embodiment of the present invention, comprises the following steps:
[0034] S10, uniformly mixing the carbon carrier and the aqueous solution of the protective agent, and then depositing platinum alloy nanoparticles to obtain a carbon carrier deposited with platinum alloy nanoparticles; wherein, the platinum alloy nanoparticles include platinum and at least one 3d transition metal.
[0035] In step S10, the carbon carrier includes, but is not limited to, conductive materials such as carbon nanotubes, carbon nanofibers, mesoporous carbon, carbon spheres, or graphene.
[0036] In step S10, after the carbon carrier and the aqueous sol...
Embodiment 1
[0066] Add 40ml of water and 120mg of sodium acetate to the flask, ultrasonically dissolve, weigh 45mg of VcxMax22 carbon black and add it to the above solution, ultrasonicate for 5min and place it on a stirrer for 60min, then use a cell disruptor to ultrasonically disperse for 40min. Afterwards, the above dispersion was poured into a 100ml beaker and stirred constantly, followed by 40mg of PtCl 4 and 28.2mgNiCl 2 ·6H 2 O was added to the dispersion and stirred for 3h. Then an aqueous solution containing 100 mg of sodium borohydride was poured into the mixture and stirred overnight. The completely reacted suspension was centrifuged and washed with water, and placed in a vacuum oven at 60° C. overnight to obtain a dried powder.
[0067] Heat the dried powder at 400°C for 2 hours for the first time, and then let the system cool down naturally. Prepare 10 ml of sulfuric acid solution with a concentration of 0.5 mol / L, add it to the flask, and place it in an oil bath at 70°C f...
Embodiment 2
[0069] The difference from Example 1 is that the protective agent is CTAB (cetyltrimethylammonium bromide), and the amount added is 75 mg.
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