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

Active Publication Date: 2020-02-21
江苏江科石墨烯研究院有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Sodium alginate solution is chelated with metal cations to form aerogels, which have been widely reported in the treatment of environmental pollution and the degradation of organic matter, but there are few reports on electrochemical hydrogen evolution

Method used

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  • Cop/graphene airgel high-efficiency hydrogen evolution composite material and preparation method
  • Cop/graphene airgel high-efficiency hydrogen evolution composite material and preparation method
  • Cop/graphene airgel high-efficiency hydrogen evolution composite material and preparation method

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Experimental program
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Effect test

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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Abstract

The invention specifically relates to a CoP / graphene aerogel composite material for high-efficiency hydrogen evolution and a preparation method thereof, and research on the hydrogen evolution performance of the CoP / graphene aerogel composite material. According to the method, hydrogel is prepared by using a simple sol-gel process, and then the CoP / graphene aerogel composite material for high-efficiency hydrogen evolution is prepared by using high-temperature phosphatization process. The CoP / graphene aerogel composite material prepared in the invention has excellent electrocatalytic hydrogen evolution performance.

Description

technical field [0001] The invention belongs to a catalyst for electrolyzing water, in particular to the research on CoP / graphene airgel high-efficiency hydrogen evolution composite material and its preparation method and its hydrogen evolution performance. Background technique [0002] In recent years, the energy crisis has attracted more and more researchers' attention, and the development and utilization of clean and efficient energy is one of the important challenges to solve the current crisis. From the perspective of energy cleanliness and recyclability, hydrogen energy, as an efficient, clean, and environmentally friendly secondary energy, has the characteristics of rich resources, high calorific value, environmental protection and pollution-free, and various forms of utilization. It has been generally regarded as an ideal The new energy that can replace fossil fuels has unparalleled advantages and infinitely broad application prospects. However, how to obtain relati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185C25B11/06C25B1/04
CPCB01J27/1853B01J35/0013B01J35/0033B01J37/036B01J37/28C25B1/04C25B11/04Y02E60/36
Inventor 谢吉民赵文通魏巍N.纳比杨赛赛张凤卿孙伟胡慧慧
Owner 江苏江科石墨烯研究院有限公司
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