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A kind of cobalt phosphide supported heteroatom doped porous carbon material, preparation method and application

A technology of porous carbon materials and cobalt phosphide, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as complex processes, and achieve clean preparation processes and excellent dual-functional oxygen catalytic properties , Highly reproducible effect

Active Publication Date: 2021-08-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the existing controllable construction of metal phosphide bifunctional catalyst multi-element heteroatom effective doping method on the surface of graphene has complex technical problems

Method used

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  • A kind of cobalt phosphide supported heteroatom doped porous carbon material, preparation method and application
  • A kind of cobalt phosphide supported heteroatom doped porous carbon material, preparation method and application
  • A kind of cobalt phosphide supported heteroatom doped porous carbon material, preparation method and application

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Embodiment 1

[0037] A preparation method of cobalt phosphide / nitrogen phosphorus doped porous carbon material with bifunctional catalytic activity, such as figure 1 As shown, the specific preparation steps are as follows:

[0038] Step 1: Weigh 23g of 2-dimethylimidazole, add 80mL of deionized water, and stir magnetically until 2-dimethylimidazole is completely dissolved;

[0039] Step 2: Add 1.2 g of cobalt nitrate hexahydrate and zinc nitrate hexahydrate (the molar mass ratio of Zn to Co is 1:1) into 10 ml of deionized water, and keep stirring to completely dissolve it to obtain a metal salt solution;

[0040]Step 3: Under the condition of magnetic stirring, slowly add the metal salt solution obtained in step 2 to the solution obtained in step 1, a precipitate is formed instantly, and the mixed solution is continuously stirred for 2 hours.

[0041] Step 4: Centrifuge the mixed solution containing the precipitate obtained in Step 3 at a speed of 10000 rpm. The sediment in the lower laye...

Embodiment 2

[0045] A preparation method of cobalt phosphide / nitrogen phosphorus doped porous carbon material with bifunctional catalytic activity, such as figure 1 As shown, the specific preparation steps are as follows:

[0046] Step 1: Weigh 23g of 2-dimethylimidazole, add 80mL of deionized water, and stir magnetically until 2-dimethylimidazole is completely dissolved;

[0047] Step 2: Add 1.2 g of cobalt nitrate hexahydrate and zinc nitrate hexahydrate (the molar mass ratio of Zn to Co is 3:1) into 10 ml of deionized water, and keep stirring to completely dissolve it to obtain a metal salt solution;

[0048] Step 3: Under the condition of magnetic stirring, slowly add the metal salt solution obtained in step 2 to the solution obtained in step 1, a precipitate is formed instantly, and the mixed solution is continuously stirred for 2 hours.

[0049] Step 4: Centrifuge the mixed solution containing the precipitate obtained in Step 3 at a speed of 10000 rpm. The sediment in the lower lay...

Embodiment 3

[0053] A preparation method of cobalt phosphide / nitrogen phosphorus doped porous carbon material with bifunctional catalytic activity, such as figure 1 As shown, the specific preparation steps are as follows:

[0054] Step 1: Weigh 23g of 2-dimethylimidazole, add 80mL of deionized water, and stir magnetically until 2-dimethylimidazole is completely dissolved;

[0055] Step 2: Add 1.2 g of cobalt nitrate hexahydrate and zinc nitrate hexahydrate (the molar mass ratio of Zn to Co is 1:3) into 10 ml of deionized water, and keep stirring to completely dissolve it to obtain a metal salt solution;

[0056] Step 3: Under the condition of magnetic stirring, slowly add the metal salt solution obtained in step 2 to the solution obtained in step 1, a precipitate is formed instantly, and the mixed solution is continuously stirred for 2 hours.

[0057] Step 4: Centrifuge the mixed solution containing the precipitate obtained in Step 3 at a speed of 10000 rpm. The sediment in the lower lay...

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Abstract

The invention discloses a cobalt phosphide / nitrogen phosphorus doped porous carbon material, a preparation method and an application thereof in an air electrode catalyst of a zinc-air battery. The preparation method is as follows: adding the organic ligand into deionized water to obtain a ligand solution; adding metal zinc and cobalt salts into deionized water to obtain a metal salt solution; slowly adding the metal salt solution into the ligand solution to complete the reaction ; The mixed solution is centrifuged, and the obtained lower precipitate is washed with deionized water several times, freeze-dried, and the sample is subjected to in-situ phosphating / carbonization treatment. In the present invention, the bimetallic framework compound is used as the catalyst precursor, and the metal phosphide grows on the surface of the heteroatom-doped carbon material through in-situ phosphating to form dual active sites to synergistically improve the electrocatalytic oxygen of the carbon-based metal phosphide composite material. Reduction / oxygen evolution performance, the final cobalt phosphide / nitrogen phosphorus doped porous carbon material can be used as an air electrode catalyst for zinc-air batteries, which can achieve long-term, high-stability charge-discharge cycles.

Description

technical field [0001] The invention relates to a cobalt phosphide / nitrogen phosphorus doped porous carbon material, a preparation method and application, and belongs to the technical field of preparation and application of electrochemical oxygen reduction / oxygen evolution bifunctional catalysts. Background technique [0002] With the increasingly prominent energy and environmental issues, clean and sustainable new energy technologies have attracted widespread attention. Metal-air batteries are considered to be one of the most promising energy technologies due to their environmental friendliness, high energy density, and high-efficiency conversion. Compared with other types of batteries, the charge and discharge performance of rechargeable Zn-air batteries largely depends on the oxygen reduction (ORR) and oxygen evolution reaction (OER) at the air-electrode interface due to their inherently slow The kinetic process has an important impact on the performance of the battery. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10C25B11/091C25B1/04H01M4/90H01M12/06
CPCB01J27/24B01J35/0033B01J35/10C25B1/04C25B11/04H01M4/9083H01M12/06Y02E60/36
Inventor 王永霞乔锦丽蔡冬青李君彭芦苇郭佳宁王旭娄文双
Owner DONGHUA UNIV
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