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Preparation method of NiCoP@graphene aerogel efficient hydrogen evolution composite material

A technology of graphene airgel and composite materials, which is applied in the field of material synthesis, can solve the problems of pollution and electrochemical hydrogen evolution, which are rarely reported, and achieve good hydrophilicity, improve the hydrogen evolution performance of electrolyzed water, and excellent electrochemical performance. Effect

Inactive Publication Date: 2018-12-18
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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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  • Preparation method of NiCoP@graphene aerogel efficient hydrogen evolution composite material
  • Preparation method of NiCoP@graphene aerogel efficient hydrogen evolution composite material
  • Preparation method of NiCoP@graphene aerogel efficient hydrogen evolution composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of NiCoP bulk material

[0031] (1) Weigh 0.5g Co(NO 3 ) 2 ·6H 2 O and 0.5g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 40ml deionized water and stirred to form Co(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 O mixed solution A.

[0032] (2) Weigh 20 mmol of NaOH solid and dissolve it in 10 ml of deionized water, and stir for 10 min to form a homogeneous solution B.

[0033](3) Add solution B drop by drop into solution A, stir for 10 min, wait until the reaction is complete, then centrifuge, wash, dry and grind the precipitate to form a gray powder.

[0034] (4) Take 0.4g of gray powder and 0.5g of red phosphorus (P) respectively, red phosphorus is placed in the upstream of the tube furnace, the gray powder of the precursor is placed in the downstream, nitrogen is used as the protective gas, the calcination temperature is 800°C, and the holding time is For 4 h, the heating rate is 4 °C / min, high-temperature phosphating is carried out, and finally the NiCoP b...

Embodiment 2

[0036] Preparation of NiCoP@Carbon Airgel (NiCoP@CA) Efficient Hydrogen Evolution Composite

[0037] (1) Weigh 0.5g Co(NO 3 ) 2 ·6H 2 O and 0.5g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 40ml deionized water and stirred to form Co(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 O mixed solution A;

[0038] (2) Weigh 0.4g of sodium alginate (SA) and pour it into 40ml of ionized water and stir vigorously to form a uniform sodium alginate solution B;

[0039] (3) A certain volume of solution B is dripped into solution A at room temperature to form a hydrogel. The formed hydrogel was aged for 8 hours, then soaked in deionized water and washed 3 times for 2 hours each time; soaked in ethanol and washed 3 times for 2 hours each time.

[0040] (4) Freeze-dry the aged, soaked and washed hydrogel in a freeze dryer for 48 hours until a xerogel is formed.

[0041] (5) Take 0.4g of xerogel and 0.5g of red phosphorus (P) respectively, red phosphorus is placed in the upstream position of th...

Embodiment 3

[0043] Preparation of NiCoP@Graphene Carbon Airgel (NiCoP@GA) High Efficiency Hydrogen Evolution Composite

[0044] (1) Weigh 0.5g Co(NO 3 ) 2 ·6H 2 O and 0.5g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 40ml deionized water and stirred to form Co(NO 3 ) 2 ·6H 2 O and Ni(NO 3 ) 2 ·6H 2 O mixed solution A;

[0045] (2) Weigh 0.4g of sodium alginate (SA) and pour it into 40ml of ionized water and stir vigorously to form a uniform sodium alginate solution B;

[0046] (3) Weigh 80 mg of GO powder and inject it into solution B, and after stirring, sonicate in an ultrasonic instrument for 30 minutes to obtain dispersion C;

[0047] (4) Add 40ml of solution C dropwise into solution A at room temperature to form a hydrogel. The formed hydrogel was aged for 8 hours, then soaked in deionized water and washed 3 times for 2 hours each time; soaked in ethanol and washed 3 times for 2 hours each time.

[0048] (5) Freeze-dry the aged, soaked and washed hydrogel in a freeze dryer for ...

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Abstract

The invention belongs to the technical field of material synthesis, and particularly relates to a preparation method of a NiCoP@graphene aerogel efficient hydrogen evolution composite material and study for the hydrogen evolution property of the NiCoP@graphene aerogel efficient hydrogen evolution composite material. Polysaccharide and graphene are combined together, hydrogel is formed through thechelate effects of the polysaccharide and metal ions of Co and Ni and then is frozen and dried into aerogel, and the aerogel is further phosphorized into the NiCoP@graphene aerogel composite material,and the NiCoP@graphene aerogel composite material is used for efficient hydrogen evolution under the acidic condition. The preparation method has the advantages that environmental friendliness is achieved, the cost is low, a preparation technology is simple and convenient, and a prepared catalyst is easy to produce industrially on a large scale and has excellent electrocatalytic activity and goodhydrogen evolution stability.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and specifically relates to the preparation method of NiCoP@graphene airgel high-efficiency hydrogen evolution composite material and the research on its hydrogen evolution performance. Background technique [0002] At present, mankind is facing increasingly serious energy crisis and environmental pollution problems, and seeking new environmentally friendly and clean alternative energy has become an important challenge to solve the current crisis. Hydrogen energy has become one of the main representatives of new environmentally friendly and clean energy due to its advantages such as high calorific value, no pollution, and various forms of utilization. It has been recognized by the scientific community as an ideal new energy that can replace fossil fuels. It has unparalleled The huge advantages and unlimited broad application prospects. However, how to obtain relatively cheap hydrogen ...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 赵文通谢吉民翟云鹏吕晓萌魏巍
Owner JIANGSU UNIV
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