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Porous amino-functionalized graphene catalytic material and preparation and application

A graphene catalytic material and amino-functional technology, applied in the field of electrochemical materials, can solve the problems of low electrocatalytic activity, high hydrogen evolution potential of electrolysis electrodes, high price, etc., and achieve the improvement of active sites and conductivity, and low synthesis cost. , the effect of promoting development

Inactive Publication Date: 2018-08-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the electrode materials used for electrolysis of water have disadvantages such as high price, small specific surface area, and low electrocatalytic activity, which lead to high hydrogen evolution potential and high energy consumption of the electrolysis electrode, which seriously restricts the development of hydrogen production technology by electrolysis of water.

Method used

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  • Porous amino-functionalized graphene catalytic material and preparation and application
  • Porous amino-functionalized graphene catalytic material and preparation and application
  • Porous amino-functionalized graphene catalytic material and preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Measure 100 mg of graphene oxide gel and dissolve it in 40 mL of deionized water. After ultrasonic stirring at room temperature for 30 min, a uniformly mixed solution is obtained. Then add 2 mL of ammonia water and stir at room temperature for 30 min. Transfer to a 50mL reactor, and conduct a hydrothermal reaction at 180°C for 12h. The hydrothermal reaction product was centrifuged, washed with water for 5 times, and then dried in a vacuum freeze-drying oven for 24 hours to obtain amino-functionalized graphene (AFNG).

[0038] (2) Weigh 20 mg of amino-functionalized graphene and disperse it in 80 mL of 6M KOH solution, heat to 80 ° C, and stir and erode for 12 h, then transfer the above solution to a polytetrafluoroethylene ball mill tank, and ball mill at a speed of 400 rpm 30h, the obtained black solution was first washed with 1M HCl to neutrality, and finally centrifuged, washed 5 times with water, and then dried in a vacuum freeze-drying oven for 24h to obtain a ...

Embodiment 2

[0043] (1) Measure 100 mg of graphene oxide gel and dissolve it in 40 mL of deionized water. After ultrasonic stirring at room temperature for 30 min, a uniformly mixed solution is obtained. Then add 4 mL of ammonia water and stir at room temperature for 30 min. Transfer to a 50mL reactor, and perform hydrothermal reaction at 150°C for 10h. The hydrothermal reaction product was centrifuged, washed with water three times, and then dried in a vacuum freeze-drying oven for 48 hours to obtain amino-functionalized graphene (AFNG).

[0044] (2) Weigh 15 mg of amino-functionalized graphene and dissolve it in 80 mL of 6M KOH solution, heat to 100 ° C, and stir and erode for 24 h, then transfer the above solution to a polytetrafluoroethylene ball mill tank, and ball mill at a speed of 1100 rpm 60h, the obtained black solution was first washed with 1M HCl to neutrality, and finally centrifuged, washed 5 times with water, and then dried in a vacuum freeze-drying oven for 24h to obtain a ...

Embodiment 3

[0048] (1) Measure 100 mg of graphene oxide gel and dissolve it in 40 mL of deionized water. After ultrasonic stirring at room temperature for 30 min, a uniformly mixed solution is obtained. Then add 2 mL of ammonia water and stir at room temperature for 30 min. Transfer to a 50mL reactor, and conduct a hydrothermal reaction at 200°C for 15h. The hydrothermal reaction product was centrifuged, washed with water for 5 times, and then dried in a vacuum freeze-drying oven for 24 hours to obtain amino-functionalized graphene (AFNG).

[0049] (2) Dissolve 10 mg of amino-functionalized graphene in 80 mL of 10M KOH solution, heat to 90 ° C, and stir and erode for 12 h, then transfer the above solution to a polytetrafluoroethylene ball mill tank, and ball mill at a speed of 900 rpm 45h, the obtained black solution was first washed with 1M HCl to neutrality, and finally centrifuged, washed 5 times with water, and then dried in a vacuum freeze-drying oven for 36h to obtain a porous amino...

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Abstract

The invention belongs to the field of electrochemical materials and discloses a porous amino-functionalized graphene catalytic material and preparation and an application. The preparation comprises the following steps: adding graphene oxide and an ammonia source into a solvent, stirring the two to be uniformly dissolved and carrying out hydro-thermal treatment, carrying out centrifugal washing andfreezing and drying on the product to obtain the amino-functionalized graphene; dispersing the amino-functionalized graphene in a strong base solution, heating and stirring the mixture for an erosionreaction, then transferring the mixture to a ball mill tank to be ball-milled and perforated, neutralizing the reaction liquid with acid, and separating, washing, freezing and drying the solid product to obtain the porous amino-functionalized graphene catalytic material. The preparation method provided by the invention is simple and is only carried out at 80 DEG C in an alkaline condition. The obtained catalytic material has very good electrochemical hydrogen evolution catalytic performance and relatively good stable performance and can promote development of scaled hydroelectrolytic catalytic materials.

Description

technical field [0001] The invention belongs to the field of electrochemical materials, and in particular relates to a porous amino-functionalized graphene catalytic material and its preparation and application. Background technique [0002] Hydrogen is the lightest and most abundant element on earth. The only product after combustion is water. It is a true "zero pollution" fuel, so it is the most attractive. In recent decades, as the world's energy demand continues to rise, more and more attention has been paid to the research on finding new energy sources to replace the existing fossil fuels. Hydrogen energy has many advantages such as cleanness, high efficiency, easy storage, safety, and transportability. With the depletion of fossil fuels and the increasingly serious environmental problems, this secondary energy is obviously a pollution-free ideal green energy in the new century, and hydrogen energy has attracted more and more attention. At present, hydrogen production...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B11/095Y02E60/36
Inventor 蒋仲杰邓冰露
Owner SOUTH CHINA UNIV OF TECH
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