Nitrogen and iron doped conjugated microporous carbon material, and preparation method and application thereof

A technology of conjugated micropores and iron doping, which is applied in the field of preparation of doped porous materials, can solve the problems of lack of resources, expensive platinum group metals, and restrictions on the development of fuel cells, and achieve the effect of long life and simple preparation process

Inactive Publication Date: 2019-11-01
JIANGXI CHANGHE AUTO
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Problems solved by technology

At present, most oxygen reduction catalysts are still based on platinum-based catalysts, but platinum-group metals are expensive and scarce, which restricts the development of fuel cells. Therefore, it is urgent to develop economical materials that can replace platinum.

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  • Nitrogen and iron doped conjugated microporous carbon material, and preparation method and application thereof
  • Nitrogen and iron doped conjugated microporous carbon material, and preparation method and application thereof

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specific Embodiment 1

[0021] A preparation method of nitrogen, iron doped conjugated microporous carbon material, comprising the following steps:

[0022] (1) In an argon-protected glove box, add 1mmol of 1,3,5-triethynylbenzene and 0.5mmol of 3,6-dibromocarbazole into a 100mL round bottom flask, and then add 0.04mmol of Tetraphenylphosphine palladium and 0.08mmol of cuprous iodide are used as catalysts, then add 4.5mL of DMF and 4.5mL of anhydrous triethylamine to the flask successively with a pipette, stir to make the reactant fully dissolve, and then The glove box was heated up to 80°C, and the mixed solution 7 in the round-bottomed flask was constantly stirred to make it fully react. After 78 hours, the round-bottomed flask was taken out from the glove box, and the resulting solid precipitate was taken out from the round-bottomed flask. After washing with methanol in sequence, suction filtration several times, and Soxhlet extraction with methanol for 16 hours to remove impurities in the product...

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Abstract

The invention relates to a nitrogen and iron doped conjugated microporous carbon material, and a preparation method and application thereof. A nitrogen-containing conjugated microporous polymer (CMP)is synthesized through a Sonogashira-Hagihara coupling reaction, then an iron element is directionally doped, and finally carbonizing is realized through high-temperature pyrolysis to prepare the nitrogen and iron doped conjugated microporous carbon material. According to the invention, the Fe element is directionally doped into the conjugated microporous polymer, so that the conjugated microporous polymer successfully shows good oxygen reduction catalytic activity, can be used as a positive electrode catalyst for a fuel cell and provides a new choice for positive electrode materials of fuel cells. The preparation method is simple in preparation process and convenient to control.

Description

technical field [0001] The invention relates to the technical field of preparation of doped porous materials, in particular to a nitrogen and iron doped conjugated microporous carbon material and its preparation method and application. Background technique [0002] The preparation of efficient cathode oxygen reduction reaction catalyst materials is an important challenge for breakthrough fuel cell application technologies. At present, most oxygen reduction catalysts are still based on platinum-series catalysts, but platinum-series metals are expensive and resource-scarce, which restricts the development of fuel cells. Therefore, it is urgent to develop economical materials that can replace platinum. [0003] It is generally believed that high surface area, high porosity and suitable pore structure are conducive to promoting the oxygen reduction reaction and product material transport, thereby improving the catalytic activity and stability of the catalyst. A class of materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10H01M4/90
CPCB01J27/24B01J35/1004H01M4/90Y02E60/50
Inventor 李东明赵二明孙卓群赵向宇陈德利
Owner JIANGXI CHANGHE AUTO
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