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An airgel-derived nitrogen-phosphorus co-doped porous carbon and its preparation method and application

A co-doping and porous carbon technology, applied in the field of porous carbon materials, can solve the problems of limited commercial application, resource shortage, low durability, etc., and achieve the effect of unique and ingenious method, high production efficiency and simple equipment

Active Publication Date: 2022-01-28
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many disadvantages of platinum-based catalysts, such as resource shortage, high cost, and low durability, limit their commercial application.

Method used

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  • An airgel-derived nitrogen-phosphorus co-doped porous carbon and its preparation method and application
  • An airgel-derived nitrogen-phosphorus co-doped porous carbon and its preparation method and application
  • An airgel-derived nitrogen-phosphorus co-doped porous carbon and its preparation method and application

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Embodiment 1

[0036] The embodiment of the present invention is a method for preparing airgel-derived nitrogen and phosphorus co-doped porous carbon. The specific steps are as follows:

[0037] S1. Add 2.0 g of block copolymer P123 to 60.0 mL of 0.25 mol / L phytic acid aqueous solution, and stir at 35°C for 5 hours until dissolved, then add 1.0 mL of pyrrole, and stir and mix for 2 minutes to obtain a milky white uniform dispersion. The milky white dispersion was transferred to a high-pressure reactor, and hydrothermally reacted at 180°C for 12 hours to obtain a nitrogen-phosphorus co-doped hydrogel. After washing the obtained nitrogen-phosphorus co-doped hydrogel with ultrapure water for several times, Freeze drying at -55°C for 72 hours to obtain nitrogen and phosphorus co-doped airgel;

[0038] S2. Put the prepared nitrogen-phosphorus co-doped airgel into a quartz boat, use a tube furnace, and raise the temperature at a rate of 5°C / min under a nitrogen atmosphere. After raising the temper...

Embodiment 2

[0041] The embodiment of the present invention is a method for preparing airgel-derived nitrogen and phosphorus co-doped porous carbon. The specific steps are as follows:

[0042] S1. Add 2.0 g of block copolymer P123 to 60.0 mL of 0.25 mol / L phytic acid aqueous solution, and stir at 35°C for 5 hours until dissolved, then add 1.0 mL of pyrrole, and stir and mix for 2 minutes to obtain a milky white uniform dispersion. The milky white dispersion was transferred to a high-pressure reactor, and hydrothermally reacted at 180°C for 12 hours to obtain a nitrogen-phosphorus co-doped hydrogel. After washing the obtained nitrogen-phosphorus co-doped hydrogel with ultrapure water for several times, Freeze drying at -55°C for 72 hours to obtain nitrogen and phosphorus co-doped airgel;

[0043] S2. Put the prepared nitrogen-phosphorus co-doped airgel into a quartz boat, use a tube furnace, and raise the temperature at a rate of 5°C / min under a nitrogen atmosphere. When the temperature ris...

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Abstract

The invention discloses an aerogel-derived nitrogen-phosphorus co-doped porous carbon and its preparation method and application. The preparation method comprises: preparing nitrogen-phosphorus co-doped hydrogel by a one-step hydrothermal method, and then coagulating the hydrogel Nitrogen-phosphorus co-doped airgel is obtained by freeze-drying the gel, and finally the airgel is carbonized at high temperature or activated by carbon dioxide; the specific surface area of ​​the obtained nitrogen-phosphorus co-doped porous carbon is 1700-2900m 2 / g, the average pore diameter is 0.5‑1.5nm, and the pore volume is 0.8‑2.3cm 3 / g. The method for preparing precursor nitrogen-phosphorus co-doped airgel provided by the invention is unique and ingenious, and the prepared precursor has the advantages of porous structure and nitrogen-phosphorus uniform co-doping; the prepared nitrogen-phosphorus co-doped porous The specific surface area of ​​the carbon is high, the pore structure is obvious, and the heteroatoms are doped; the preparation method of the nitrogen-phosphorus co-doped porous carbon provided has mild conditions, a simple process, readily available and cheap raw materials, is suitable for large-scale production, and has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of porous carbon materials, in particular to an airgel-derived nitrogen-phosphorus co-doped porous carbon and its preparation method and application. Background technique [0002] With the increasing demand for sustainable and green energy, fuel cells have attracted much attention. Oxygen reduction reaction, as a key reaction in fuel cells, has attracted extensive research interest. Currently, platinum-based catalysts are the most commonly used electrocatalysts for the oxygen reduction reaction. However, many disadvantages of platinum-based catalysts, such as resource shortage, high cost, and low durability, limit their commercial applications. Therefore, trying to find advanced catalysts that can replace traditional platinum-based catalysts, such as developing new metal-free catalysts or reducing the content of platinum in platinum-based catalysts, is an urgent problem to be solved. [0003] Carbon mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C01B32/318C01B32/336H01M4/90H01M4/88H01G11/34H01G11/86B01D53/02B01J20/20B01J20/28B01J20/30
CPCC01B32/05C01B32/318C01B32/336H01M4/90H01M4/88H01G11/34H01G11/86B01D53/02B01J20/20B01J20/28054B01J20/3078Y02E60/50
Inventor 韩宝航孙亚楠赵丽隋竹银
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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