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A kind of porous nitrogen-doped carbon-supported iron nitride catalyst and its preparation method and application

A technology of nitrogen-doped carbon and iron nitride, which is applied to structural parts, electrical components, battery electrodes, etc., can solve catalyst problems and other problems, and achieve good catalytic performance, high stability, and high activity.

Active Publication Date: 2021-10-19
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of realizing commercial application of fuel cells, one of the biggest problems encountered is the catalyst for the cathode oxygen reduction reaction.

Method used

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  • A kind of porous nitrogen-doped carbon-supported iron nitride catalyst and its preparation method and application
  • A kind of porous nitrogen-doped carbon-supported iron nitride catalyst and its preparation method and application
  • A kind of porous nitrogen-doped carbon-supported iron nitride catalyst and its preparation method and application

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preparation example Construction

[0028] The present invention also provides a preparation method of the above-mentioned porous nitrogen-doped carbon-supported iron nitride catalyst, comprising the following steps:

[0029] The polyaniline and MIL-100(Fe) are ground and mixed and then sintered to obtain a porous nitrogen-doped carbon-supported iron nitride catalyst.

[0030] In the present invention, the preparation method of described polyaniline is:

[0031] Ammonium peroxodisulfate oxidizes and polymerizes aniline in hydrochloric acid solution to obtain polyaniline.

[0032] Specifically, the hydrochloric acid solution of ammonium peroxodisulfate is added to the hydrochloric acid solution of aniline, the mixed solution is allowed to stand at low temperature for a period of time to react, and then the mixed solution is centrifuged, washed and dried to obtain a solid, namely polyaniline.

[0033] The concentration of HCl in the hydrochloric acid solution is 1mol / L, the volume ratio of aniline to hydrochloric...

Embodiment 1

[0049] Catalyst preparation

[0050] (1) Utilize ammonium peroxodisulfate to oxidize and polymerize aniline in hydrochloric acid solution to obtain polyaniline;

[0051] (2) Utilize trimesic acid, reduced iron powder, nitric acid and hydrofluoric acid to carry out hydrothermal reaction to obtain MIL-100(Fe);

[0052] (3) The polyaniline obtained in step (1) and step (2) and MIL-100(Fe) were mixed by grinding at a mass ratio of 8:1 to obtain a mixture of the two materials.

[0053] (4) pyrolyzing the mixture obtained in step (3) in an argon atmosphere? hour, that is, to obtain Fe X N / NC-0.

[0054] Prepared Fe X N / NC-0, Fe / Fe supported on porous nitrogen-doped carbon 2 o 3 , see Figure 1~3 , figure 1 Among them, a is the porous nitrogen-doped carbon-supported iron nitride catalyst Fe prepared in Example 1 X SEM image of N / NC-A (A=0); figure 2 In, Fe X N / NC-0 is the porous nitrogen-doped carbon-supported iron nitride catalyst Fe prepared in Example 1 of the present ...

Embodiment 2

[0059] Catalyst preparation

[0060] (1) Utilize ammonium peroxodisulfate to oxidize and polymerize aniline in hydrochloric acid solution to obtain polyaniline;

[0061] (2) Utilize trimesic acid, reduced iron powder, nitric acid and hydrofluoric acid to carry out hydrothermal reaction to obtain MIL-100(Fe);

[0062] (3) The polyaniline obtained in step (1) and step (2) and MIL-100(Fe) were mixed by grinding at a mass ratio of 8:1 to obtain a mixture of the two materials.

[0063] (4) The mixture obtained in step (3) was pyrolyzed in ammonia (10%) / argon (90%) atmosphere for 3 hours to obtain Fe X N / NC-3.

[0064] Prepared Fe X N / NC-3, Fe supported on porous nitrogen-doped carbon 4 N / Fe 3 N, see Figure 1~3 , figure 1 Among them, b is the porous nitrogen-doped carbon-supported iron nitride catalyst Fe prepared in Example 2 X SEM image of N / NC-A (A=3); figure 2 In, Fe X N / NC-3 is the porous nitrogen-doped carbon-supported iron nitride catalyst Fe prepared in Example 2...

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Abstract

The present invention provides a porous nitrogen-doped carbon-supported iron nitride catalyst, which is composed of porous nitrogen-doped carbon and iron nitride supported on the surface of the porous nitrogen-doped carbon and in the pores, and the iron nitride is Fe X N,x=2,3,4. In the porous nitrogen-doped carbon-supported iron nitride catalyst of the present invention, iron and nitrogen form iron nitride and disperse on the nitrogen-doped carbon, the content of doped nitrogen is high, and it has high specific surface area, high activity, Higher stability. The catalyst is prepared as an electrode for catalyzing the oxygen reduction reaction, exhibits excellent catalytic performance in the electrochemical oxygen reduction reaction, and has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a porous nitrogen-doped carbon-supported iron nitride catalyst, a preparation method and application thereof. Background technique [0002] The energy issue is one of the biggest issues in the 21st century and an important material basis for economic growth and social development. There are two main methods to deal with the energy crisis and environmental problems caused by the consumption of traditional fossil fuels: one is to improve the efficiency of fuel utilization, delay the time of fuel exhaustion, and alleviate the energy shortage in the short term; the other is to explore and develop renewable energy technologies, from Basically remove dependence on fossil fuels. With the second industrial revolution, mankind has entered the era of electrification, and the integration and utilization of electric energy is particularly critical. With the increas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 俞汉青胡晓刘武军
Owner UNIV OF SCI & TECH OF CHINA