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Nitrogen-doped carbon material supported by cobalt nitride and preparation method thereof

A nitrogen-doped carbon and cobalt nitride technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as poor dispersion and uncontrollable composite material morphology, and achieve uniform metal dispersion , excellent electrocatalytic performance, cheap and easy-to-obtain raw materials

Active Publication Date: 2019-07-23
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a cobalt nitride-loaded nitrogen-doped carbon material in order to solve the problems of uncontrollable morphology and poor dispersion of the existing nitrogen-doped composite materials

Method used

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  • Nitrogen-doped carbon material supported by cobalt nitride and preparation method thereof
  • Nitrogen-doped carbon material supported by cobalt nitride and preparation method thereof
  • Nitrogen-doped carbon material supported by cobalt nitride and preparation method thereof

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preparation example Construction

[0026] The present invention firstly provides a method for preparing a cobalt nitride-supported nitrogen-doped carbon material, which specifically includes the following steps:

[0027] Step 1. Preparation of ZnO core-shell structure precursor

[0028] 1) Dissolve polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123), trishydroxymethylaminomethane (Tris) and ZnO nanospheres in water, stir evenly, and obtain a mixed liquid;

[0029] 2) Dopamine is dissolved in deionized water, then added to the above mixed solution, stirred for reaction, and then the reaction solution is centrifuged, washed and dried to obtain a ZnO core-shell structure precursor; the reaction temperature is preferably room temperature, and the reaction The time is preferably 1 to 3 hours;

[0030] The mass ratio of the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, trishydroxymethylaminomethane, ZnO nanospheres and dopamine is preferably (0.05~0.20...

Embodiment 1

[0039] 1. Preparation of ZnO core-shell structure precursor

[0040] 1) Dissolve 0.08g P123, 0.12g Tris and 0.10g ZnO nanospheres in water, stir and mix evenly to obtain a mixed aqueous solution;

[0041] 2) 0.40 g of dopamine was dissolved in deionized water, added to the above solution, and stirred and reacted at room temperature for 1 h;

[0042] 3) The reacted solution is centrifuged, washed several times with ethanol, and then dried in an oven to obtain a ZnO core-shell structure precursor.

[0043] 2. Preparation of Co 4 N-supported nitrogen-doped carbon materials

[0044] 1) Weigh 0.04g of cobalt nitrate and add it to 10ml of aqueous solution in which 0.08g of ZnO core-shell structure precursor is dissolved, then slowly add 5ml of hydrazine hydrate to the solution, and stir and react at room temperature for 60min;

[0045] 2) Centrifuge the reacted solution and wash it several times with ethanol;

[0046] 3) adding 0.50 g of melamine to the product obtained above fo...

Embodiment 2

[0052] 1. Preparation of ZnO core-shell structure precursor

[0053] 1) Dissolve 0.20g P123, 0.15g Tris and 0.08g ZnO nanospheres in water, stir and mix evenly to obtain a mixed aqueous solution;

[0054] 2) 0.20 g of dopamine was dissolved in deionized water, added to the above solution, and stirred and reacted at room temperature for 3 hours;

[0055] 3) The reacted solution is centrifuged, washed several times with ethanol, and then dried in an oven to obtain a ZnO core-shell structure precursor.

[0056] 2. Preparation of Co 4 N-supported nitrogen-doped carbon materials

[0057] 1) Weigh 0.50g of cobalt nitrate and add it to 10ml of aqueous solution in which 2.00g of ZnO core-shell structure precursor is dissolved, then slowly add 2ml of hydrazine hydrate to the solution, and stir and react at room temperature for 40min;

[0058] 2) Centrifuge the reacted solution and wash it several times with ethanol;

[0059] 3) adding 0.30 g of melamine to the product obtained abov...

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Abstract

The invention provides a preparation method of a nitrogen-doped carbon material supported by cobalt nitride, and belongs to the field of preparation of nanocomposites. The method is to coat the outside of ZnO nanospheres with dopamine by using the ZnO nanospheres as templates to prepare a ZnO core-shell structure precursor, introduce cobalt into the ZnO core-shell structure in a form of cobalt nitrate, grind the ZnO core-shell structure in the presence of melamine, and calcine an obtained solid product at high temperature so as to obtain the nitrogen-doped carbon material supported by Co4N. The invention also provides the nitrogen-doped carbon material supported by Co4N prepared by the method. The material of the invention has excellent electrocatalytic properties and can be widely appliedto oxygen reduction, oxygen precipitation and the like.

Description

technical field [0001] The invention belongs to the field of nanocomposite material preparation, and in particular relates to a preparation method of cobalt nitride-loaded nitrogen-doped carbon material. Background technique [0002] Nitrogen-doped carbon materials have the characteristics of large specific surface area, good conductivity, many active sites and simple preparation methods, and are considered to be a very ideal catalyst carrier in the field of electrochemistry. On the other hand, the transition metal nitride is doped with nitrogen in the transition metal, so that it has electron donor characteristics and enhances its conductivity and stability. Combining transition metal nitrides and nitrogen-doped carbon materials can obtain a dual-functional catalyst with excellent performance, which can improve the dispersion of transition metal nitrides and effectively improve the catalytic performance of the catalyst. application is important. [0003] At present, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/10B01J37/08
CPCB01J27/24B01J37/082B01J35/393B01J35/396B01J35/33B01J35/61
Inventor 李丹丹陈璐璐郏建波
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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