Preparation method of electrocatalyst with nanowire structure for methanol fuel cell
A methanol fuel cell and electrocatalyst technology, which is applied in battery electrodes, nanotechnology, structural parts, etc., can solve the problems of limited supply, high price, and unsustainability, and achieve the effect of improving electrocatalytic activity, simple operation, and good contact.
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Embodiment 1
[0032] Step S1: Dissolve 10.8 mg of platinum acetylacetonate, 94 mg of iron acetylacetonate and 0.8 g of potassium hydroxide in a mixed solvent of 30 mL of oleylamine, 5 mL of n-heptanol, 10 mL of N,N-dimethylformamide and 5 mL of ethylene glycol , stirred and mixed evenly at room temperature, then transferred to the autoclave and reacted at 150 °C for 8 h. After the reaction, the obtained black precipitate was washed with absolute ethanol for 3-4 times to obtain pure ultrafine PtFe alloy nanowire catalyst. The PtFe alloy nanowire catalyst is ultrasonically dispersed in an ethanol solution to obtain a standby solution;
[0033] Step S2: Add XC-72 carbon black to the standby solution obtained in Step S1, stir and disperse evenly, and then let stand at room temperature. After the supernatant is clarified, suck out the supernatant, and the black precipitate that settles to the bottom is placed in a vacuum drying box. The PtFe alloy nanowire catalyst supported on carbon black was ...
Embodiment 2
[0036] Step S1: Dissolve 35.4 mg of platinum acetylacetonate, 74.2 mg of iron acetylacetonate and 0.8 g of potassium hydroxide in a mixed solvent of 30 mL of oleylamine, 5 mL of n-heptanol, 10 mL of N,N-dimethylformamide and 5 mL of ethylene glycol After the reaction was completed, the black precipitate was washed with absolute ethanol for 3-4 times to obtain a pure ultrafine PtFe alloy nanowire catalyst. ultrasonically dispersing the PtFe alloy nanowire catalyst in an ethanol solution to obtain a standby solution;
[0037] Step S2: add XC-72 carbon black to the standby solution obtained in step S1, stir and disperse evenly and then let stand at room temperature. After the supernatant is clarified, suck out the supernatant, and the black precipitate that settles to the bottom is placed in a vacuum drying box. The PtFe alloy nanowire catalyst supported on carbon black was obtained by drying at 40°C. Depend on figure 2 It can be seen that the Pt obtained in this example 30 Fe...
Embodiment 3
[0040] Step S1: Dissolve 59 mg of platinum acetylacetonate, 53 mg of iron acetylacetonate and 0.8 g of potassium hydroxide in a mixed solvent of 30 mL of oleylamine, 5 mL of n-heptanol, 10 mL of N,N-dimethylformamide and 5 mL of ethylene glycol, After stirring and mixing at room temperature, it was transferred into the autoclave and reacted at 150°C for 8 hours. After the reaction, the black precipitate obtained was washed with absolute ethanol for 3-4 times to obtain pure ultrafine PtFe alloy nanowire catalyst. The PtFe alloy nanowire catalyst was ultrasonically dispersed in an ethanol solution to obtain a standby solution;
[0041] Step S2: add XC-72 carbon black to the standby solution obtained in step S1, stir and disperse evenly and then let stand at room temperature. After the supernatant is clarified, suck out the supernatant, and the black precipitate that settles to the bottom is placed in a vacuum drying box. The PtFe alloy nanowire catalyst supported on carbon black...
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