Cobalt-nitrogen doped carbon composite material and preparation method thereof

A technology of nitrogen-doped carbon and composite materials, which is applied in electrical components, battery electrodes, circuits, etc., can solve the problems that hinder the commercialization of fuel cells, low platinum reserves, and gaps in platinum-based catalysts, and achieve ingenious experimental design and preparation The effect of environmental protection and easy operation

Active Publication Date: 2018-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the reduction and oxidation reactions of the cathode and anode of the fuel cell, especially the oxygen reduction reaction of the cathode, are extremely slow and require a large amount of catalysts.
At present, the oxygen reduction catalysts are mainly precious metal platinum catalysts, but the low reserves of platinum and high prices seriously hinder the commercialization of fuel cells. The key to fuel cell commercialization
In recent years, the oxygen reduction catalytic activity of non-platinum catalysts has been greatly improved, but there is still a large gap with platinum-based catalysts

Method used

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  • Cobalt-nitrogen doped carbon composite material and preparation method thereof
  • Cobalt-nitrogen doped carbon composite material and preparation method thereof
  • Cobalt-nitrogen doped carbon composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of cobalt-nitrogen doped carbon composite material:

[0030] (1) Add cobalt nitrate, magnesium nitrate, aluminum nitrate, and urea mixed in a mass ratio of 0.4:2:1:30 to deionized water, and heat the solution to 100°C;

[0031] (2) Prepare a solution after washing the prepared layered double hydroxide;

[0032] (3) Adjust the pH value of the solution to weakly alkaline, and then add dopamine hydrochloride at a mass ratio of 1:1;

[0033] (4) After drying the sample, add melamine, the mass ratio of the sample to melamine is 1:10, and stir evenly;

[0034] (5) Heat the sample at 750℃ for 2h while stirring;

[0035] (6) Wash the sample thoroughly, vacuum and dry at 80°C, and the final composite material obtained is recorded as Co / N / C.

Embodiment 2

[0037] The difference from Example 1 is that the mass ratio of cobalt nitrate, magnesium nitrate, and aluminum nitrate is 0.2:2:1, and the final composite material obtained is denoted as Co / N / C-1.

Embodiment 3

[0039] The difference from Example 1 is that the mass ratio of cobalt nitrate, magnesium nitrate, and aluminum nitrate is 0.8:2:1, and the final composite material obtained is denoted as Co / N / C-2.

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Abstract

The invention discloses a cobalt-nitrogen doped carbon composite material and a preparation method thereof. The cobalt-nitrogen doped carbon composite material is prepared from cobalt nitrate, dopamine and melamine; the preparation method comprises the steps that cobalt nitrate, magnesium nitrate, aluminum nitrate and urea are added into deionized water, the solution is heated to 100 DEGC, and a layered double hydroxide is prepared; the layered double hydroxide is prepared into a solution after being washed; the ph value of the solution is regulated to be a slightly alkaline value, and dopamine hydrochloride is added; after a sample is dried and stirred with melamine to be uniform, and then thermal treatment is performed; a sample is sufficiently washed and dried. The prepared composite material is a high-performance oxygen reduction catalyst and has the good cyclic stability.

Description

Technical field [0001] The invention relates to a cobalt-nitrogen doped carbon composite material and a preparation method thereof, and belongs to the technical field of carbon nanomaterials. Background technique [0002] Fuel cells have outstanding advantages such as high efficiency and cleanliness, and are the most promising power battery, which can be widely used in mobile power sources and portable power sources. However, the reduction and oxidation reaction of the anode and cathode of the fuel cell, especially the oxygen reduction reaction of the cathode, is extremely slow, requiring a large amount of catalyst. At present, oxygen reduction catalysts are mainly precious metal platinum catalysts, but low platinum reserves and high prices have seriously hindered the commercialization of fuel cells. Therefore, the development of high-efficiency and low-cost non-platinum catalysts to replace platinum-based catalysts to catalyze oxygen reduction reactions is successfully achieved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M4/96
CPCH01M4/86H01M4/8647H01M4/88H01M4/90H01M4/96Y02E60/50
Inventor 张超李倩倩刘天西刘思良郭和乐
Owner DONGHUA UNIV
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