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Cobalt phosphide loaded heteroatom doped porous carbon material as well as preparation method and application thereof

A porous carbon material, cobalt phosphide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as complex processes, achieve clean preparation process, high repeatability, avoidance of The effect of easy reunion

Active Publication Date: 2020-08-18
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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  • Cobalt phosphide loaded heteroatom doped porous carbon material as well as preparation method and application thereof
  • Cobalt phosphide loaded heteroatom doped porous carbon material as well as preparation method and application thereof
  • Cobalt phosphide loaded heteroatom doped porous carbon material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

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 and phosphorus doped porous carbon material, a preparation method and application thereof in an air electrode catalyst of a zinc-air battery. The preparation method comprises the following steps: adding an organic ligand into deionized water to obtain a ligand solution; adding metal zinc and cobalt salt into deionized water to obtain a metal saltsolution; slowly adding a metal salt solution into the ligand solution, and carrying out a reaction completely; and centrifuging the mixed solution, cleaning the obtained lower precipitate with deionized water for multiple times, carrying out freeze drying, and carrying out in-situ phosphatization / carbonization treatment on the sample. According to the invention, a bimetallic skeleton compound isused as a catalyst precursor; metal phosphide grows on the surface of the heteroatom doped carbon material through in-situ phosphorization; the cobalt phosphide / nitrogen-phosphorus doped porous carbon material is used as an air electrode catalyst of a zinc-air battery, and long-time and high-stability charge-discharge circulation can be realized. The cobalt phosphide / nitrogen-phosphorus doped porous carbon material is used as the air electrode catalyst of the zinc-air battery.

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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IPC IPC(8): B01J27/24B01J35/10C25B11/06C25B1/04H01M4/90H01M12/06
CPCB01J27/24C25B11/04C25B1/04H01M4/9083H01M12/06B01J35/33B01J35/60Y02E60/36
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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