Method for preparing catalyst for proton exchange membrane fuel cell
A proton exchange membrane and fuel cell technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems such as long reaction time, difficult removal, unproven particle shape control, etc., to achieve Low cost and the effect of avoiding the use of organic solvents
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Embodiment 1
[0026] 1. Dissolve glucose in deionized water at 80°C to obtain a glucose solution with a mass fraction of 10%.
[0027] 2. The K of 19.1mmol / L 2 PtCl 4 The aqueous solution was added to the above solution so that the molar concentration of Pt element was 2.0 mmol / L, the reaction was stirred at 80 °C for 3 h, and cooled to room temperature to obtain a brown-black Pt nanoparticle sol.
[0028] 3. Disperse the Vulcan XC-72R carbon black 4 times of the Pt quality in absolute ethanol to form a suspension, and the concentration of the carbon black in the suspension is 4.5 mg / mL; then the carbon black is suspended The solution was added to the above-mentioned Pt nanoparticle sol, and stirred at room temperature for 12 h.
[0029] 4. The above mixture is then centrifuged, washed with deionized water for 3 to 5 times, and finally dried under vacuum at 60° C. to obtain supported Pt nanoparticles (Pt / C).
[0030] figure 1 TEM image of supported Pt nanoparticles.
Embodiment 2
[0032] 1. Dissolve glucose in deionized water at 80°C to obtain a glucose solution with a mass fraction of 10%.
[0033] 2. Weigh citric acid and add it to the solution described in step 1, so that it is fully dissolved, so that the molar concentration of citric acid in the solution is 53.5 mmol / L.
[0034] 3. 34.2mmol / L Na 2 PdCl 4The aqueous solution was added to the solution described in step 2 so that the molar concentration of Pd element was 7.6 mmol / L, and the reaction was stirred at 80° C. for 2 h, and cooled to room temperature to obtain a brown-black Pd nanoparticle sol.
[0035] figure 2 TEM image of the obtained Pd nanoparticles.
Embodiment 3
[0037] 1. Dissolve glucose in deionized water at 40°C to obtain a glucose solution with a mass fraction of 10%.
[0038] 2. Weigh citric acid and add it to the solution described in step 1, so that it is fully dissolved, so that the molar concentration of citric acid in the solution is 53.5 mmol / L.
[0039] 3. 34.2mmol / L Na 2 PdCl 4 The aqueous solution was added to the solution described in step 2 so that the molar concentration of the Pd element was 3.8 mmol / L, and the reaction was stirred at 40° C. for 2 h and cooled to room temperature to obtain a brown-black Pd nanoparticle sol.
[0040] image 3 TEM image of the obtained Pd nanoparticles.
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