Metal organic gel-based Fe-N-C composite material and preparation method thereof

A composite material, metal-organic technology, applied in the field of nanomaterials, can solve the problems of high price, scarce reserves, CO poisoning, etc., and achieve the effects of high electrochemical stability, ingenious experimental design, and simple preparation process.

Active Publication Date: 2018-06-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current Pt-based catalysts used in low-temperature fuel cell cathodes are hindered by the commercialization of fuel cells due to their high price, scarce reserves, CO poisoning, anode fuel permeation poisoning, slow kinetics, and poor stability.

Method used

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  • Metal organic gel-based Fe-N-C composite material and preparation method thereof
  • Metal organic gel-based Fe-N-C composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of Fe-N-C composite material based on metal organogel:

[0026] (1) Mix terephthalic acid and o-phenylenediamine, dissolve in N,N-2 methylformamide, the mass ratio of terephthalic acid and o-phenylenediamine is 2:3;

[0027] (2) ferric nitrate is dissolved in ethanol, the mass ratio of terephthalic acid and ferric nitrate is: 2: 3;

[0028] (3) Mix the two solutions obtained, and then sonicate to obtain a gel;

[0029] (4) drying the obtained gel and vacuumizing at 60°C;

[0030] (5) Fe-N-C composite material was prepared by high-temperature carbonization, the inert gas was high-purity argon, the carbonization temperature was 900°C, and the heating rate was 5°C / min. After reaching the target temperature, keep it warm for 2 hours;

[0031] (6) Pickling and drying the prepared Fe-N-C composite material, the acid used is hydrochloric acid with a concentration of 1 mol / L, and stirring for 8 hours for pickling.

Embodiment 2

[0033] The difference from Example 1 is that the mass ratio of terephthalic acid to o-phenylenediamine is 1:1, and the finally obtained composite material is denoted as Fe-N-C-1.

Embodiment 3

[0035] The difference from Example 1 is that the mass ratio of terephthalic acid to o-phenylenediamine is 1:2, and the finally obtained composite material is recorded as Fe-N-C-2.

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Abstract

The invention discloses a metal organic gel-based Fe-N-C composite material and a preparation method thereof. The raw material of the Fe-N-C composite material comprises terephthalic acid, o-phenylenediamine and ferric nitrate. The preparation method comprises the steps of mixing and dissolving the terephthalic acid and the o-phenylenediamine in N, N-2-methylformamide; dissolving the ferric nitrate in ethyl alcohol; performing ultrasound after the two solutions are mixed to obtain gel; and performing high-temperature carbonization on the gel to obtain the Fe-N-C composite material. The gel isprepared by organic coordination of metal, and a transition metal nitrogen-doped carbon material having high catalytic activity is obtained by a high-temperature carbonization technology. The preparedFe-N-C composite material has relatively high electrocatalytic activity and electrochemical stability and is an ideal oxidization-reduction catalyst.

Description

technical field [0001] The invention relates to a metal organic gel-based Fe-N-C composite material and a preparation method thereof, belonging to the technical field of nanometer materials. Background technique [0002] Currently, the Pt-based catalysts used in low-temperature fuel cell cathodes are hindered by the commercialization of fuel cells due to their high price, scarce reserves, CO poisoning, anode fuel permeation poisoning, slow kinetics, and poor stability. Therefore, it is necessary to research and develop low-cost, high-activity, and high-stability non-noble metal oxygen reduction catalysts to replace the currently used platinum-based catalysts. The design and preparation of advanced carbon nanomaterials with high specific surface area and structural stability to non-noble metal oxygen reduction reaction catalysts can not only provide maximized electrocatalytic specific surface area for electron transfer, but also improve electrocatalytic stability for long-ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88B01J13/00B82Y30/00
CPCB01J13/0065B01J13/0069B82Y30/00H01M4/8825H01M4/9083Y02E60/50
Inventor 张超李倩倩刘天西郭和乐封其春
Owner DONGHUA UNIV
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