Double-carbon coupling transition metal nickel-based quantum dot electrocatalyst and preparation method thereof
A technology of transition metals and quantum dots, applied in electrodes, electrolytic processes, electrolytic components, etc., to achieve the effects of easy industrial production, high product purity, excellent electrocatalytic activity and stability
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Embodiment 1
[0021] Example 1, the preparation method and application of double carbon-coupled transition metal nickel-cobalt quantum dot composite material (Ni@NC@NG), including the following steps:
[0022] (1) Two-dimensional ultra-thin nickel-based zeolite-imidazole framework flake precursor (2DNi-ZIF@GO) of composite graphene oxide was prepared by co-precipitation method: 300 mg of nickel nitrate hexahydrate was weighed and dissolved in 5 mL of methanol solution , Mix the above solution with 10 mL of graphene oxide suspension and stir for 20 min. Further, 5 mL, 300 mg of 2-methylimidazole solution was slowly added to the above mixture, and stirred at room temperature for 10 min; then the mixture was transferred to a 50 mL autoclave and placed at a constant temperature of 180 °C box, reacted for 4 h, cooled at room temperature, centrifuged the product, and washed three times with deionized water. Finally, the product was placed in a freeze dryer at −50 °C and freeze-dried for 48 h, an...
Embodiment 2
[0026] Example 2, the preparation method and application of double carbon-coupled binary transition metal nickel-cobalt quantum dot composite material (NiCo@NC@NG), including the following steps:
[0027](1) Two-dimensional ultrathin nickel-cobalt-based zeolite imidazole framework flake precursor (2D Ni-ZIF@GO) was prepared by co-precipitation method: Weigh 250 mg of nickel nitrate hexahydrate and 50 mg of hexahydrate Cobalt nitrate hydrate was dissolved in 10 mL of methanol solution, and the above solution was fully mixed with 20 mL of graphene oxide suspension, and stirred for 20 min. Further, 5 mL, 400 mg of 2-methylimidazole solution was slowly added to the above mixture, and stirred at room temperature for 10 min; then the mixture was transferred to a 50 mL autoclave and placed in a thermostat at 190 °C , reacted for 6 h, cooled at room temperature, centrifuged the product, and washed 4 times with deionized water. Finally, the product was placed in a freeze dryer at −50 ...
Embodiment 3
[0031] Example 3, the preparation method and application of double carbon-coupled ternary transition metal nickel-cobalt quantum dot composite material (NiCoFe@NC@NG), including the following steps:
[0032] (1) The two-dimensional ultrathin nickel-cobalt-iron nanosheet precursor (2D NiCoFe-ZIF@G) of composite graphene was prepared by co-precipitation method: 200 mg of Ni(NO 3 ) 2 •6H 2 O, 30 mg Co(NO 3 ) 2 •6H 2 O and 30 mg Fe(NO 3 ) 2 •6H 2 O was dissolved in 5 mL of methanol solution, and the above solution was thoroughly mixed with 17 mL of graphene oxide suspension, and stirred for 20 min. Further, 5 mL, 328 mg of 2-methylimidazole solution was slowly added to the above mixture, and stirred at room temperature for 10 min; then the mixture was transferred to a 50 mL autoclave and placed in a thermostat at 180 °C , reacted for 8 h, cooled at room temperature, centrifuged the product, and washed 4 times with deionized water. Finally, the product was placed in a free...
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