Carbon material, preparation method therefor and application of carbon material

A carbon material and raw material technology, which is applied in the field of carbon material and its preparation, can solve the problems of easy agglomeration, long catalyst life, high price, and reduced

Active Publication Date: 2019-12-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, platinum-based catalysts still have two problems: one is expensive and resources are scarce; the other is that they are easily poisoned by organic fuels and the catalyst is easy to agglomerate and grow, which reduces the life of the catalyst.

Method used

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  • Carbon material, preparation method therefor and application of carbon material
  • Carbon material, preparation method therefor and application of carbon material
  • Carbon material, preparation method therefor and application of carbon material

Examples

Experimental program
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Embodiment approach

[0107]According to one embodiment of the present application, the preparation method of the fuel cell cathode catalyst comprises the following steps:

[0108] 1) Soak the mucormycetes in a solution containing iron ions and thiocyanate ions, and fully combine the inside and outside of the mucormycetes cells with the iron ions and thiocyanate ions by means of osmosis, adsorption or coordination bonding;

[0109] 2) After freezing the above-mentioned soaked mucormycetes, place them in a freeze dryer to complete freeze-drying, so that the mucormycetes cells retain the original morphological structure as much as possible;

[0110] 3) After the above-mentioned freeze-dried sample is subjected to high-temperature carbonization, the iron or iron oxide generated is removed with an acid solution, and the fuel cell cathode catalyst is obtained after washing, filtering and drying;

[0111] The fuel cell cathode catalyst is a hierarchically porous nano-carbon oxygen reduction catalyst co-d...

Embodiment 1

[0121] 1) Cultivate mucormycetes: Spray 6g of mucormycetes evenly on the surface of a total of 1.5kg of fresh tofu, place the tofu in an incubator with a temperature of 25°C and a humidity of 80%, and keep the training box ventilated , after 3 days of cultivation, the surface of the tofu is covered with white filamentous mucormycetes, and the mucormycetes are collected with tweezers;

[0122] 2) Soak 20g of mucormycetes in an aqueous solution containing iron ions and thiocyanate ions. The concentrations of iron ions and thiocyanate ions are 0.001mol / L and 0.003mol / L respectively. After soaking for 1 hour, the mucormycetes are basically The adsorption is saturated, take it out and drain it slightly, and put it in a refrigerator at minus 18°C ​​to freeze it;

[0123] 3) placing the above-mentioned frozen mucormycosis in a freeze dryer to complete freeze-drying;

[0124] 4) Place the above freeze-dried sample in an atmosphere furnace for annealing and carbonization. The atmosphe...

Embodiment 2

[0130] The difference between this example and Example 1 is that the way of freezing in step 2) is: showering with liquid nitrogen, so that the object to be treated is quickly frozen.

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Abstract

The invention discloses a carbon material, a preparation method therefor and an application of the carbon material. The carbon material is ferrum, nitrogen and sulfur codoped multistage-pore nano-carbon, wherein a catalyst has a thin-layer flake texture. The carbon material serves as a fuel cell cathode, the catalyst is a ferrum, nitrogen and sulfur codoped multistage-pore nano-carbon redox catalyst, multistage-pore nano-carbon is doped with ferrum, nitrogen and sulfur elements, and multistage pores comprise micropores, mesopores and macropores. The carbon material has efficient redox catalysis performance and can be applied to air electrode catalysts of hydrogen-oxygen fuel cells, zinc-air fuel cells, magnesium-air fuel cells and aluminum-air fuel cells.

Description

technical field [0001] The application relates to a carbon material and its preparation method and application, belonging to the field of nano carbon materials. Background technique [0002] Fuel cells have the advantages of high energy density, high conversion efficiency, clean and pollution-free, and are considered to be a sustainable green and clean energy technology. In fuel cells, including hydrogen-oxygen fuel cells and metal-air fuel cells, the cathode catalyst is a key factor affecting the performance of the cell. At present, the most commonly used cathode catalysts in fuel cells are mainly Pt-based catalysts because of the high redox catalytic activity of platinum-based catalysts. However, platinum-based catalysts still have two problems: one is expensive and the resources are scarce; the other is that they are easily poisoned by organic fuels and the catalysts tend to agglomerate and grow, which reduces the catalyst life. Therefore, the development of non-preciou...

Claims

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Application Information

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IPC IPC(8): C01B32/15H01M4/96H01G11/32
CPCC01B32/15H01G11/32H01M4/96Y02E60/50
Inventor 吴初新官轮辉
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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