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Iron-nitrogen doped hollow porous carbon material and preparation method thereof

A porous carbon material, hollow technology, used in electrical components, battery electrodes, circuits, etc., can solve the problems of restricting the application of MOFs, poor conductivity, etc., to increase the density of active sites, uniform size, enhance conductivity and stability. Effect

Active Publication Date: 2021-02-02
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, poor electrical conductivity is its fatal shortcoming, which severely restricts the application of MOFs in the field of electrocatalysis.

Method used

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  • Iron-nitrogen doped hollow porous carbon material and preparation method thereof
  • Iron-nitrogen doped hollow porous carbon material and preparation method thereof
  • Iron-nitrogen doped hollow porous carbon material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] An embodiment of the iron-nitrogen-doped hollow porous carbon material of the present invention, the preparation method of the iron-nitrogen-doped hollow porous carbon material described in this embodiment includes the following steps:

[0030] (1) SiO 2 Synthesis of spheres: Mix 0.6mL tetraethyl orthosilicate, 15mL ethanol, 0.7mL ammonia water with a mass fraction of 25-28% and 5mL deionized water, stir for 10h, centrifuge at 8000rpm for 3min, wash with ethanol 3 times, After drying in a vacuum oven for 12h, the SiO 2 ball;

[0031] (2) PP-SiO 2 Preparation: 3g SiO 2 Add 80mL PDDA mass fraction of 1% PDDA solution into the ball, stir for 1h, centrifuge and wash to obtain P-SiO 2 ; Then the prepared P-SiO 2 Add 80mL of PSS solution with a mass fraction of 1% PSS, stir for 1h, centrifuge and wash to obtain the PP-SiO 2 ;

[0032] (3) PP-SiO 2 Preparation of @ZIF-8-Fe: Dissolve 200mg 2-methylimidazole in 10mL methanol to obtain 2-methylimidazole solution; then 150...

Embodiment 2

[0035] An embodiment of the iron-nitrogen-doped hollow porous carbon material of the present invention, the preparation method of the iron-nitrogen-doped hollow porous carbon material described in this embodiment is except that the content of iron nitrate nonahydrate is 10 mg, the remaining preparation steps All the same as in Example 1.

Embodiment 3

[0037] An embodiment of the iron-nitrogen-doped hollow porous carbon material of the present invention, in the preparation method of the iron-nitrogen-doped hollow porous carbon material described in this embodiment, the content of iron nitrate nonahydrate is 20mg, and the content of PDDA solution Consumption is 90mL, in PDDA solution, the massfraction of PDDA is 0.8%, the consumption of PSS solution is 90mL, in PSS solution, the massfraction of PSS is 0.8%, all the other preparation steps are identical with embodiment 1.

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Abstract

The invention discloses an iron-nitrogen doped hollow porous carbon material and a preparation method thereof, and relates to a synthesis technology of porous materials. The preparation method comprises the following steps: (1) synthesizing SiO2 spheres; (2) preparing SiO2 modified by polyelectrolyte; (3) preparing an iron-doped ZIF-8 coated polyelectrolyte modified SiO2 composite material; and (4) preparing an iron-nitrogen doped hollow porous carbon material. The iron-nitrogen doped hollow porous carbon material prepared by the preparation method disclosed by the invention is uniform in size, has good ORR catalytic activity and stability, and is lower in price compared with a traditional Pt / C catalyst.

Description

technical field [0001] The invention relates to the synthesis technology of porous materials, in particular to a hollow porous carbon material doped with iron and nitrogen and a preparation method thereof. Background technique [0002] Fuel cell is a representative of energy conversion device, which can directly convert chemical energy into electrical energy. Because of its high energy conversion rate, low pollution, and portability, it has become the core technology to solve the problems of energy crisis and environmental pollution. However, its cathode oxygen reduction reaction (ORR) kinetics is slow, which limits the commercial application of fuel cells. Electrocatalysts with excellent performance can accelerate the electrochemical reaction kinetics at the electrode-electrolyte interface of fuel cells and improve the performance and service life of fuel cells. Therefore, the study of ORR electrocatalysts for fuel cells has always been an important content of research and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/90H01M4/88
CPCH01M4/96H01M4/90H01M4/9083H01M4/8825Y02E60/50
Inventor 刘浩辉刘敏超郏建波刘长宇白书立徐晓龙吕欢张杨杨倩
Owner WUYI UNIV
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