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Method for preparing metal-nitrogen molecule/graphene/carbon nanofiber composite material through electrostatic spinning and application of metal-nitrogen molecule/graphene/carbon nanofiber composite material

A technology of carbon nanofibers and electrospinning, applied in chemical instruments and methods, catalyst activation/preparation, electrodes, etc., can solve problems such as increased cost, unevenness, weak adhesion of coated catalysts, etc., and achieve enhanced stability , the effect of strong flexibility

Pending Publication Date: 2022-03-18
GREEN IND INNOVATION RES INST OF ANHUI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Traditional catalysts generally require a gas diffusion layer (such as carbon paper) as a support layer, and there are problems such as weak and uneven adhesion of coated catalysts and increased costs.

Method used

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  • Method for preparing metal-nitrogen molecule/graphene/carbon nanofiber composite material through electrostatic spinning and application of metal-nitrogen molecule/graphene/carbon nanofiber composite material
  • Method for preparing metal-nitrogen molecule/graphene/carbon nanofiber composite material through electrostatic spinning and application of metal-nitrogen molecule/graphene/carbon nanofiber composite material
  • Method for preparing metal-nitrogen molecule/graphene/carbon nanofiber composite material through electrostatic spinning and application of metal-nitrogen molecule/graphene/carbon nanofiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Preparation of metal-nitrogen molecule\polyacrylonitrile composite nanofiber membrane material

[0059] 1. Add 0.5g of heme iron into 20g of N-N dimethylformamide solvent, stir at room temperature to make it evenly distributed, and obtain a tan solution, then add 1.28g of polyacrylonitrile (accounting for the mass of N-N dimethylformamide 6%), stirred vigorously at room temperature for 12 hours to obtain a viscous spinning solution.

[0060] 2. Put the precursor solution into the container box containing the spinning solution, set the distance between the wires to 15cm, the scanning speed of the container box to 30mm / min, the ambient humidity to about 30% RH, and the applied voltage to 24kV. spinning to obtain Fe-N / polyacrylonitrile composite nanofiber membrane material.

[0061]3. Place the obtained Fe-N / polyacrylonitrile nanofiber membrane material in a vacuum oven and dry it at 80°C for 12 hours to remove the residual DMF organic solvent. The optical phot...

Embodiment 2

[0062] Embodiment 2: catalytic reaction

[0063] 1. Pretreat the Fe-N / polyacrylonitrile nanofiber membrane material prepared in Example 1 under an air atmosphere. The pretreatment temperature is 280°C, the pretreatment time is 2h, and the heating rate is 5°C / min. After the temperature was lowered to room temperature, the pretreated Fe-N / polyacrylonitrile nanofiber membrane was obtained. The tensile strength of the composite film is 35MPa according to the film strength measurement by a universal mechanical instrument.

[0064] 2. Place the pretreated Fe-N / polyacrylonitrile nanofiber membrane in an ammonia atmosphere for carbonization treatment. The carbonization temperature is 1050°C, the carbonization time is 1h, and the heating rate is 5°C / min. Fe -N / carbon nanofiber membrane as ORR, CO 2 RR catalyst. The tensile strength of the catalyst membrane after heat treatment was 21 MPa.

[0065] 3. ORR catalytic performance test

[0066] A circular die with a diameter of 5 mm wa...

Embodiment 3

[0070] Embodiment 3: catalytic reaction

[0071] 1. Pretreat the Fe-N / polyacrylonitrile nanofiber membrane material prepared in Example 1 under an air atmosphere. The pretreatment temperature is 280°C, the pretreatment time is 2h, and the heating rate is 5°C / min. After the temperature was lowered to room temperature, the pretreated Fe-N / polyacrylonitrile nanofiber membrane was obtained.

[0072] 2. Place the pretreated Fe-N / polyacrylonitrile nanofiber membrane under an argon atmosphere for carbonization treatment. The carbonization temperature is 1050°C, the carbonization time is 1h, and the heating rate is 5°C / min. Fe -N / carbon nanofiber membrane as ORR, CO 2 RR catalyst. The difference between this and Example 2 is that the carbonization treatment atmosphere is different.

[0073] 3. ORR catalytic performance test

[0074] A circular die with a diameter of 5 mm was used to press a disc with a diameter of 5 mm from the Fe-N / carbon nanofiber membrane as a catalyst for the ...

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Abstract

The invention discloses a method for preparing a metal-nitrogen molecule / graphene / carbon nanofiber composite material through electrostatic spinning and application of the metal-nitrogen molecule / graphene / carbon nanofiber composite material, a precursor containing metal and nitrogen elements, graphene and a high-molecular polymer are prepared into a spinning solution for electrostatic spinning, and a metal-nitrogen molecule / graphene / polymer composite nanofiber membrane is obtained; then the obtained composite nanofiber membrane is sequentially subjected to pre-oxidation and carbonization treatment, and the metal-nitrogen molecule / graphene / carbon nanofiber composite material with the characteristics of being large in specific surface area, rich in micropores and mesopores, uniform in morphology and the like is obtained and can be used as a bifunctional catalyst for oxygen reduction and carbon dioxide reduction; the method has the characteristics of simple preparation process, low cost, easiness in recovery, excellent performance and the like.

Description

technical field [0001] The invention relates to a method for preparing a metal-nitrogen molecule / graphene / carbon nanofiber composite material by electrospinning and an application thereof, belonging to the field of new energy. Background technique [0002] With the continuous development of the times, the demand for energy is also increasing. If things go on like this, the fossil energy stored on the earth will be exhausted day by day. At the same time, with the extensive use of fossil energy, CO 2 The large amount of emissions makes the greenhouse effect worse and worsens the global environment. Therefore, how to develop clean, reliable new energy and reduce CO 2 Emissions are among the looming issues at the moment. [0003] Recently, fuel cells and metal-air batteries have attracted much attention as one of the alternatives to fossil energy. However, both fuel cells and metal-air batteries are deeply limited by the slow kinetics of the oxygen reduction reaction (ORR), w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02B01J35/06B01J37/08B01J37/34C25B1/23C25B1/50C25B11/091H01M4/86H01M4/90B01J35/00
CPCB01J27/24B01J37/342B01J37/084B01J37/086B01J37/082H01M4/8647H01M4/9041H01M4/9083C25B1/23C25B1/50C25B11/091B01J35/58B01J35/33B01J35/40Y02E60/50
Inventor 王俊中许翔翔郑方才肖娟定
Owner GREEN IND INNOVATION RES INST OF ANHUI UNIV
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