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Ni2P@C/graphene aerogel hydrogen evolution composite material and preparation method thereof

A technology of graphene airgel and composite materials, which is applied in the field of Ni2P nanoparticle-embedded graphene airgel high-efficiency hydrogen evolution composite materials and its preparation. It can solve the problems of pollution and electrochemical hydrogen evolution, which are rarely reported, and achieve good hydrophilicity. performance, improving the hydrogen evolution performance of electrolyzed water, good electrochemical stability and the effect of hydrogen evolution performance

Active Publication Date: 2018-09-07
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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  • Ni2P@C/graphene aerogel hydrogen evolution composite material and preparation method thereof
  • Ni2P@C/graphene aerogel hydrogen evolution composite material and preparation method thereof
  • Ni2P@C/graphene aerogel hydrogen evolution composite material and preparation method thereof

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Effect test

Embodiment 1

[0026] Preparation of Ni 2 P nanoparticles / carbon airgel (Ni 2 P / CA) efficient hydrogen evolution composite material

[0027] (1) Weigh a certain amount of Ni(NO 3 ) 2 ·6H 2 O was dissolved in deionized water and stirred to form 2.5 wt% Ni(NO 3 ) 2 ·6H 2 O solution A.

[0028] (2) A certain amount of sodium alginate (SA) was weighed and poured into deionized water and stirred for 12 hours to form a uniform sodium alginate solution B with a mass fraction of 1 wt%.

[0029](3) Inject 50ml of solution A into 50ml of solution B at normal 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.

[0030] (4) Freeze-dry the aged, soaked and washed hydrogel in a freeze dryer for 48 hours until a xerogel is formed.

[0031] (5) Take xerogel and red phosphorus (P) with a mass ratio of 1:1, red phosphorus is placed in the upstream of the tube furnace, and xerogel...

Embodiment 2

[0033] Preparation of Ni 2 P@C / graphene airgel (Ni 2 P@C / GA) efficient hydrogen evolution composite material

[0034] (1) Weigh a certain amount of Ni(NO 3 ) 2 ·6H 2 O was dissolved in deionized water and stirred to form 2.5 wt% Ni(NO 3 ) 2 ·6H 2 O solution A;

[0035] (2) Weigh a certain amount of sodium alginate (SA) and pour it into deionized water and stir for a long enough time to form a uniform sodium alginate solution B with a mass fraction of 1 wt%.

[0036] (3) Measure the GO solution of 2 mg / ml with a mass fraction of 5% and inject it into solution B, stir, and sonicate in an ultrasonic instrument to obtain dispersion C, m GO / (m GO +m SA ) is 5wt%;

[0037] (4) Inject solution A into solution C at normal temperature, the volume ratio of solution A and solution C is 1:1, forming 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 ...

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Abstract

The invention belongs to a hydrogen evolution composite material; a polysaccharide and graphene are combined, a hydrogel is formed by using a chelation effect of the polysaccharide and a metal ion, the hydrogel is freeze-dried to form an aerogel, and the aerogel is further phosphorized to form a Ni2P@C / graphene aerogel high-efficiency hydrogen evolution composite material for high-efficiency hydrogen evolution under acidic conditions. The hydrogen evolution composite material has the advantages of being green, environmentally friendly, low in cost, and simple in preparation process, and the prepared catalyst is easy to be industrially produce on a large scale and has excellent electrocatalytic activity and good hydrogen evolution stability. The carbon aerogel formed by carbonization of thepolysaccharide has a developed network structure which greatly increases the specific surface area of a catalyst. The pore structure of the aerogel plays a very good role in the fixation and dispersion of Ni2P nanoparticles. The electron migration rate is greatly improved, and the electrochemical hydrogen evolution performance of the Ni2P can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to carbon shell-wrapped Ni 2 P nanoparticle-embedded graphene airgel high-efficiency hydrogen evolution composite material, its preparation method and its hydrogen evolution performance. Background technique [0002] In recent years, the problems of environmental pollution and energy crisis have become increasingly serious, and the development of environmentally friendly production processes and the use of clean and effective energy are one of the important challenges to solve the current crisis. From the perspective of clean energy and recyclability, hydrogen, as an energy source, has the characteristics of abundant resources, high calorific value, environmental protection and pollution-free, and various utilization forms. It has been generally regarded as an ideal new energy that can replace fossil fuels. , has incomparable huge advantages and infinitely br...

Claims

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Application Information

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IPC IPC(8): B01J27/185C25B11/06C25B1/04
CPCC25B1/04C25B11/04B01J27/1853B01J37/036B01J37/28B01J35/23B01J35/33Y02E60/36
Inventor 谢吉民赵文通魏巍杨赛赛张凤卿孙伟胡慧慧戴呈静
Owner JIANGSU UNIV
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