Preparation method of zinc-based bimetallic-nitrogen-doped carbon material and application of zinc-based bimetallic-nitrogen-doped carbon material in electrode catalyst

A bimetallic, nitrogen-doped carbon technology, applied to battery electrodes, fuel cell half-cells, primary battery half-cells, circuits, etc., can solve the problems of large amount of organic solvents, high risk, high price, etc. , to achieve the effect of increased specific surface area, high product yield and good electrocatalytic stability

Inactive Publication Date: 2020-10-30
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the preparation of zinc-containing bimetallic-nitrogen-doped carbon is mostly obtained by annealing zinc-nitrogen-based ZIF precursors or zinc-containing bimetallic salt-carbon-based precursors in ammonia, and the synthesis of ZIF precursors has a low yield. and organic solvents, etc., while

Method used

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  • Preparation method of zinc-based bimetallic-nitrogen-doped carbon material and application of zinc-based bimetallic-nitrogen-doped carbon material in electrode catalyst
  • Preparation method of zinc-based bimetallic-nitrogen-doped carbon material and application of zinc-based bimetallic-nitrogen-doped carbon material in electrode catalyst
  • Preparation method of zinc-based bimetallic-nitrogen-doped carbon material and application of zinc-based bimetallic-nitrogen-doped carbon material in electrode catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Mix and dilute 10 g ferric chloride hexahydrate, 10 g zinc chloride, 20 ml 5 wt.% polyvinyl alcohol 1788 (~1 g) to 40 ml solution; cm 3 Soak the melamine foam in the above solution, take it out with tweezers, put it in a 60°C oven and dry it with air to obtain the precursor;

[0037] (2) Put the precursor into a tube furnace, use 50 ml / min of high-purity nitrogen as a protective gas, heat it to 900 °C at a heating rate of 5 °C / min, and keep it for 1 hour, and obtain a carbonized product after cooling;

[0038] (3) Grind the carbonized product into a powder with a mortar, add 5 ml of 1 mol / L hydrochloric acid to sonicate for 0.5 hours, wash with water and ethanol for 3 times, put the centrifuged product in a 60°C oven and blow dry to obtain iron- Zinc-nitrogen doped chain-like porous carbon sphere material, named Fe-Zn-N-C;

[0039] (4) Ultrasonic dispersion of 5 mg of Fe-Zn-N-C and 5 mg of ruthenium dioxide in a mixed solvent of 1 ml of water and 1 ml of ethanol c...

Embodiment 2

[0051] (1) Mix and dilute 5 g ferric chloride hexahydrate, 5 g zinc chloride, 20 ml 5 wt.% polyvinyl alcohol 1788 (~1 g) to 40 ml solution; cm 3 Soak the melamine foam in the above solution, take it out with tweezers, put it in a 60°C oven and dry it with air to obtain the precursor;

[0052] (2) Put the precursor into a tube furnace, use 50 ml / min of high-purity nitrogen as the protective gas, heat it up to 800 °C at a heating rate of 5 °C / min, and keep it for 2 hours, and obtain a carbonized product after cooling;

[0053] (3) Grind the carbonized product into powder with a mortar, add 5 ml of 1 mol / L nitric acid to sonicate for 0.5 hours, wash with water and ethanol for 3 times, put the centrifuged product in a 60°C oven and dry it to obtain iron- Zinc-nitrogen doped chain-like porous carbon sphere material, named Fe-Zn-N-C2;

[0054] (4) Ultrasonic dispersion of 5 mg of Fe-Zn-N-C2 and 5 mg of ruthenium dioxide in a mixed solvent of 1 ml of water and 1 ml of ethanol conta...

Embodiment 3

[0058] (1) Mix and dilute 15 g ferric chloride hexahydrate, 15 g zinc chloride, 20 ml 5 wt.% polyvinyl alcohol 1788 (~1 g) to 40 ml solution; cm 3 Soak the melamine foam in the above solution, take it out with tweezers, put it in a 60°C oven and dry it with air to obtain the precursor;

[0059] (2) Put the precursor into a tube furnace, use 50 ml / min of high-purity argon as a protective gas, heat it to 1000 °C at a heating rate of 10 °C / min, and keep it for 1 hour, and obtain a carbonized product after cooling ;

[0060] (3) Grind the carbonized product into a powder with a mortar, add 5 ml of 1 mol / L sulfuric acid to sonicate for 0.5 hours, wash with water and ethanol for 3 times, put the centrifuged product in a 60°C oven and blow dry to obtain iron- Zinc-nitrogen doped chain-like porous carbon sphere material, named Fe-Zn-N-C3;

[0061] (4) Ultrasonic dispersion of 5 mg of Fe-Zn-N-C3 and 5 mg of ruthenium dioxide in a mixed solvent of 1 ml of water and 1 ml of ethanol co...

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Abstract

The invention belongs to the technical field of hybrid material preparation and relates to a preparation method of a zinc-based bimetallic-nitrogen-doped carbon material. The method comprises the steps of dissolving a metal chloride, zinc chloride and a carbon source molecule in water to form a mixed solution according to a mass ratio of 5-15: 5-15: 1; by taking melamine foam as a framework and anitrogen source, performing fully soaking, taking-out and drying to obtain a precursor; heating the precursor to 800-1000 DEG C in an inert gas atmosphere at a heating rate of 5-10 DEG C/min, annealing for 1-2 hours, and cooling to room temperature to obtain a carbonized product; and crushing, washing with acid, water and alcohol, and drying to obtain the material. According to the preparation method, the melamine foam is used as the framework and the nitrogen source, so that the uniform doping of heteroatoms and the increase of the specific surface area are facilitated, zinc chloride assistedannealing can be used for pore forming and zinc doping of the carbon-based material, and the synergistic improvement of the specific surface area of the carbon-based material and the density of zinc-nitrogen active sites is facilitated. Compared with commercial Pt/C, the prepared material has higher ORR electrocatalytic activity and stability.

Description

technical field [0001] The invention belongs to the technical field of hybrid material preparation and relates to heteroatom doping, in particular to a preparation method of a zinc-based bimetal-nitrogen-doped carbon material and its application to an electrode catalyst. Background technique [0002] Metal-air batteries and hydrogen / alcohol fuel cells have become research hotspots in the field of energy storage and conversion because of their high energy density, environmental protection, and good safety. During the discharge process of this type of battery, a 4-electron oxygen reduction reaction (ORR) will occur on the side of the air electrode. Due to the limitation of slow reaction kinetics, a high overpotential will be generated, thereby reducing the energy conversion efficiency and cycle life of the battery. hinder the commercial application of such batteries. Therefore, it is necessary to develop efficient and stable ORR electrocatalysts to improve the operating effic...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/90H01M4/88H01M12/06
CPCH01M4/8825H01M4/9083H01M4/96H01M12/06
Inventor 杨石榴刘鑫河代晨晨
Owner JIANGSU UNIV
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