Method for preparing proton exchange membrane fuel cell supported catalyst
A technology of supported catalysts and proton exchange membranes, applied in chemical instruments and methods, physical/chemical process catalysts, battery electrodes, etc., can solve the problems of catalyst particle growth and aggregation, difficulty in preparing high-load catalysts, etc., and achieve simplification Effects of post-treatment process, simple preparation method, and mild reaction conditions
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[0029] Example 1
[0030] In the reactor, 0.54g H 2 PtCl 6 ·6H 2 O was dissolved in a mixed solvent of 20 mL of ethylene glycol and 20 mL of water, and 0.3 g of multi-walled carbon nanotubes (MWNT) was added to the mixed solvent to fully disperse to form a suspension. The suspension was heated to 90°C, 5 mL of formaldehyde solution was added to the mixed system, and the mixture was stirred at 90°C for 2 hours. The resulting mixture was filtered, and the filter cake was rinsed with deionized water until the filtrate became neutral. Drying in H 2 With N 2 Under the protection of the mixed gas, the obtained black solid powder is calcined at 200°C for 3 hours at a heating rate of 20°C / min, and a Pt / C supported catalyst with a Pt content of 40wt% can be obtained; the mixed gas The volume percentage of hydrogen in the catalyst is 5%, and the average particle size of the Pt metal particles in the supported catalyst is 3.0 nm.
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[0031] Example 2
[0032] In the reactor, 0.36g H 2 PtCl 6 ·6H 2 O and 0.21g RuCl 3 ·6H 2 O was dissolved in a mixed solvent of 16 mL of ethylene glycol and 16 mL of water, and 0.8 g of activated carbon was added to it to fully disperse to form a suspension. The suspension was stirred and heated to 70°C, and 3 mL of formaldehyde solution was added dropwise to the mixed system, and stirred at 70°C for 3 hours. The resulting mixture was filtered, and the filter cake was rinsed with deionized water until the filtrate became neutral. Drying in H 2 Under the protection of the mixed gas with Ar gas, the obtained black solid powder was calcined at 200° C. for 3 hours, and the heating rate was 5° C. / min. A PtRu / C supported catalyst with a metal content of 20wt% and a Pt:Ru atomic ratio of 1:1 can be obtained; wherein the volume percentage of hydrogen in the mixed gas is 20%, and the supported catalyst is The average particle size of the Pt metal particles is 2.5nm.
[0033] The TEM pict...
Example Embodiment
[0034] Example 3
[0035] In the reactor, 0.54g H 2 PtCl 6 ·6H 2 O and 0.26g Co(NO 3 ) 2 ·6H 2 O was dissolved in a mixed solvent of 10 mL of ethylene glycol and 40 mL of water, and then 0.75 g of carbon nanotubes were added to the mixed solvent to fully disperse to form a suspension. The suspension was heated to 90°C, and 0.5 mL of a 0.1 g / mL sodium borohydride aqueous solution was first added to the mixed system, and then 5 mL of formaldehyde solution was added, and the mixture was stirred at 90°C for 2 hours. The resulting mixture was filtered, and the filter cake was rinsed with deionized water until the filtrate became neutral. Drying in H 2 With N 2 Under the protection of the mixed gas, the obtained black solid powder is calcined at 200°C for 3 hours, and the heating rate is 10°C / min. The mass percentage of Pt is 20wt%, and the mass percentage of Co is 5wt%. PtCo / C supported catalyst; wherein the volume percentage of hydrogen in the mixed gas is 5%, and the average partic...
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