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Iron-nitrogen doped core-shell carbon sphere material and preparation method thereof

An iron-doped, core-shell technology, applied in nanotechnology for materials and surface science, electrical components, battery electrodes, etc., can solve problems such as porous structure collapse, limit material transport, reduce surface area, etc., to promote graphitization degree, high ORR activity, enhanced conductivity and stability

Inactive Publication Date: 2021-02-05
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the porous structure collapses during pyrolysis, reducing the surface area, limiting species transport and affecting activity.

Method used

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  • Iron-nitrogen doped core-shell carbon sphere material and preparation method thereof
  • Iron-nitrogen doped core-shell carbon sphere material and preparation method thereof
  • Iron-nitrogen doped core-shell carbon sphere material and preparation method thereof

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Effect test

Embodiment 1

[0026] An embodiment of the preparation method of the iron-nitrogen-doped core-shell carbon sphere material of the present invention, the preparation method described in this embodiment includes the following steps:

[0027] (1) Synthesis of PDA balls: Mix 112mL deionized water and 28mL methanol, then drop 1.5mL ammonia water into the mixture to obtain solution A; add 0.5g dopamine hydrochloride to solution A, stir for 30h, and centrifuged at 8500rpm for 3min, washed 3 times with methanol and ethanol, and dried in a vacuum oven for 12h to obtain the PDA spheres;

[0028] (2) Preparation of PDA@ZIF-8-Fe: Add 0.1g of PDA balls into 30mL of methanol, ultrasonically disperse for 10min to obtain a dispersion; then add 0.22g of zinc nitrate hexahydrate, 0.49g of 2-methyl imidazole and 0.02g ferric nitrate nonahydrate, stirred for 15h, centrifuged, washed with methanol three times, and then dried in a vacuum oven at 60°C for 12h to obtain the PDA@ZIF-8-Fe;

[0029] (3) Preparation o...

Embodiment 2

[0031] An embodiment of the preparation method of the iron-nitrogen-doped core-shell carbon sphere material of the present invention, the difference between this embodiment and the embodiment 1 is that the addition amount of iron nitrate nonahydrate is 0.01 g.

Embodiment 3

[0033] An embodiment of the preparation method of the iron-nitrogen-doped core-shell carbon sphere material of the present invention, the difference between this embodiment and the embodiment 1 is that the addition amount of iron nitrate nonahydrate is 0.04 g.

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Abstract

The invention discloses an iron-nitrogen doped core-shell carbon sphere material and a preparation method thereof, and relates to the technical field of core-shell materials. The preparation method ofthe iron-nitrogen doped core-shell carbon sphere material comprises the following steps: (1) preparing polydopamine spheres; (2) preparing an iron-doped metal organic framework coated polydopamine sphere compound; and (3) preparing the iron-nitrogen doped core-shell carbon sphere material. Compared with a Pt / C catalyst sold in the market, the iron-nitrogen doped core-shell carbon sphere materialprepared by the method provided by the invention shows higher ORR activity.

Description

technical field [0001] The invention relates to the technical field of core-shell materials, in particular to an iron-nitrogen-doped core-shell carbon sphere material and a preparation method thereof. Background technique [0002] Oxygen reduction reaction (ORR) is one of the most important cathode reactions for clean and efficient energy storage and conversion devices such as proton exchange membrane fuel cells, microbial fuel cells, and metal-air batteries. However, the slow kinetics severely impact the overall performance of these devices. To speed up the kinetics, highly efficient cathode catalysts should be provided. So far, platinum (Pt)-based catalysts are considered to be the most active ORR electrocatalysts. However, high cost, poor durability, and poor tolerance to fuel molecules (methanol, ethanol...) hinder their development and widespread application. Therefore, in order to achieve the goal of practical application, scholars have focused on the research of ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/96Y02E60/50
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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