A cobalt nitride supported porous carbon catalyst for cathodic oxygen reduction reaction of a fuel cell and a preparation method thereof

A fuel cell cathode and catalyst technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve the problems of high cost of use, restricting the potential application prospects of fuel cells, etc., and achieve low cost and methanol resistance Strong poisoning ability and good stability

Active Publication Date: 2018-12-21
HUANGGANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, platinum-based catalysts have shown excellent activity in the process of catalyzing the oxygen reduction reaction, but platinum is a noble metal element, and the cost of use is high, which restricts the potential application prospects of fuel cells.

Method used

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  • A cobalt nitride supported porous carbon catalyst for cathodic oxygen reduction reaction of a fuel cell and a preparation method thereof
  • A cobalt nitride supported porous carbon catalyst for cathodic oxygen reduction reaction of a fuel cell and a preparation method thereof
  • A cobalt nitride supported porous carbon catalyst for cathodic oxygen reduction reaction of a fuel cell and a preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Dissolve 4.3mmol of aniline, 4.3mmol of pyrrole and 0.2mmol of Triton X-100 in 60mL of deionized water to obtain a uniform mixture, then add 2mmol of cobalt nitrate hexahydrate into the above mixture and stir to obtain a new mixture liquid;

[0029] (2) Add 20 mL of ammonium persulfate aqueous solution with a concentration of 0.05 g / mL pre-cooled at 3°C ​​to the mixed solution obtained in step (1), and immediately place the mixed solution at 3°C ​​for 24 hours to polymerize. After completion, filter, wash, and dry to obtain a black intermediate product;

[0030] (3) Put the black intermediate product obtained in step (2) in a tube furnace, then seal it and feed ammonia gas at 50mL / min, raise the temperature to 700°C at 5°C / min after 1 hour, and continue the high temperature treatment at 700°C After 3 hours, the temperature was lowered to room temperature, and the cobalt nitride-supported porous carbon catalyst was obtained, which was named as Co 2 N-2-700@NC.

Embodiment 2

[0032] (1) Dissolve 4.3mmol of aniline, 4.3mmol of pyrrole and 0.2mmol of Triton X-100 in 60mL of deionized water to obtain a uniform mixture, then add 1mmol of cobalt nitrate hexahydrate to the above mixture and stir to obtain a new mixture liquid;

[0033] (2) Add 20 mL of ammonium persulfate aqueous solution with a concentration of 0.05 g / mL pre-cooled at 3°C ​​to the mixed solution obtained in step (1), and immediately place the mixed solution at 3°C ​​for 24 hours to polymerize. After completion, filter, wash, and dry to obtain a black intermediate product;

[0034] (3) Put the black intermediate product obtained in step (2) in a tube furnace, then seal it and feed ammonia gas at 50mL / min, raise the temperature to 700°C at 5°C / min after 1 hour, and continue the high temperature treatment at 700°C After 3 hours, the temperature was lowered to room temperature, and the cobalt nitride-supported porous carbon catalyst was obtained, which was named as Co 2 N-1-700@NC.

Embodiment 3

[0036] (1) Dissolve 4.3mmol of aniline, 4.3mmol of pyrrole and 0.2mmol of Triton X-100 in 60mL of deionized water to obtain a uniform mixture, then add 3mmol of cobalt nitrate hexahydrate into the above mixture and stir to obtain a new mixture liquid;

[0037] (2) Add 20 mL of ammonium persulfate aqueous solution with a concentration of 0.05 g / mL pre-cooled at 3°C ​​to the mixed solution obtained in step (1), and immediately place the mixed solution at 3°C ​​for 24 hours to polymerize. After completion, filter, wash, and dry to obtain a black intermediate product;

[0038] (3) Put the black intermediate product obtained in step (2) in a tube furnace, then seal it and feed ammonia gas at 50mL / min, raise the temperature to 700°C at 5°C / min after 1 hour, and continue the high temperature treatment at 700°C After 3 hours, the temperature was lowered to room temperature, and the cobalt nitride-supported porous carbon catalyst was obtained, which was named as Co 2 N-3-700@NC.

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Abstract

The invention discloses a preparation method of a cobalt nitride supported porous carbon catalyst for cathodic oxygen reduction reaction of a fuel cell. The preparation method of the catalyst comprises the following steps: (1) adding a cobalt source to a catalyst containing aniline, pyrrole and triton X-100 percent of deionized water, and stirring to obtain a uniform mixed liquid; (2) adding a precooled ammonium persulfate aqueous solution (initiator) at 3 DEG C into the mixed solution obtained in the step (1) at one time, polymerizing the mixed solution at a low temperature immediately, filtering, washing and drying after the polymerization reaction is completed to obtain a black intermediate product; (3) subjecting the black intermediate product obtained in the step (2) is prepared in anammonia atmosphere to heat treatment at 600 to 800 degree centigrade to obtain a porous carbon catalyst supported on cobalt nitride. Compared with the prior art, the method of the invention is simplein operation, low in cost, high in oxygen reduction reaction activity, good in stability and strong in methanol poisoning resistance, and can be used as a cathode catalyst in a fuel cell.

Description

technical field [0001] The invention belongs to the technical field of chemical energy, and relates to a method for preparing a cobalt nitride-supported porous carbon catalyst for the oxygen reduction reaction of a fuel cell cathode. Background technique [0002] Fuel cell (Fuel cell) is a green and efficient energy conversion device, and is not limited by Carnot's law of thermodynamics. It has the advantages of convenient storage and transportation, low noise, normal temperature use, convenient fuel carrying and replenishment, and no mechanical vibration. It has great potential application value. The reaction mechanism of the oxygen reduction reaction (Oxygen Reduction Reaction, ORR) corresponding to the cathode in the fuel cell is relatively complex and the reaction process is slow, so the whole process requires an efficient catalyst. At present, platinum-based catalysts have shown excellent activity in the process of catalyzing the oxygen reduction reaction, but platinum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00
CPCB82Y30/00H01M4/9083Y02E60/50
Inventor 朱钰方田正芳
Owner HUANGGANG NORMAL UNIV
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