Cop/graphene airgel high-efficiency hydrogen evolution composite material and preparation method
A technology of graphene airgel and composite materials, which is applied in the research of hydrogen evolution performance, CoP/graphene airgel high-efficiency hydrogen evolution composite materials and preparation fields, can solve the problems of few reports and pollution in electrochemical hydrogen evolution, and achieve Improve the hydrogen evolution performance of electrolyzed water, improve the stability, and the effect of simple preparation process
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Embodiment 1
[0026] Preparation of CoP / Aerogel (CoP / As) High Efficiency Hydrogen Evolution Composite
[0027] (1) Weigh Co(NO 3 ) 2 .6H 2 O was dissolved in deionized water and stirred to form 2.5 wt% Co(NO 3 ) 2 .6H 2 O solution A.
[0028] (2) Weigh sodium alginate (SA) and pour it into deionized water and stir for 12 hours to form a uniform sodium alginate solution B with a mass fraction of 1 wt%.
[0029] (3) Inject 50ml of solution B into 50ml of solution A at room temperature to form a hydrogel. The formed hydrogel was aged for 12 hours, then soaked in deionized water and ethanol for 2 hours each time, and washed 3 times.
[0030] (4) Freeze-dry the aged, soaked and washed hydrogel in a freeze dryer for 48 hours to form xerogel.
[0031] (5) The dry gel and red phosphorus (P) were taken separately, the red phosphorus was placed in the upstream of the tube furnace, and the dry gel was placed in the downstream for high-temperature phosphating at 800°C to finally obtain CoP / As. ...
Embodiment 2
[0033] Preparation of CoP / graphene airgel composite materials for high-efficiency hydrogen evolution
[0034] (1) Weigh Co(NO 3 ) 2 .6H 2 O was dissolved in deionized water and stirred to form 2.5 wt% Co(NO 3 ) 2 .6H 2 O solution A.
[0035] (2) Weigh sodium alginate (SA) and pour it into deionized water and stir for 12 hours to form a uniform sodium alginate solution B with a mass fraction of 1 wt%.
[0036] (3) GO (2 mg / ml) solutions with mass fractions of 5%, 10% and 20% were respectively measured and injected into solution B, stirred, and sonicated in an ultrasonic instrument to obtain dispersion C;
[0037] (4) Inject 50 ml of Dispersion C into 50 ml of Solution A at room temperature to form a hydrogel. The formed hydrogel was aged for 12 hours, then soaked in deionized water and ethanol for 3 times, each time for 2 hours, and washed 3 times.
[0038] (5) Freeze-dry the aged, soaked and washed hydrogel in a freeze dryer for 48 hours until a xerogel is formed.
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