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Synthesis of metal CO-supported N-doped three-dimensional porous carbon materials with excellent electrocatalytic oxygen reduction performance

A three-dimensional porous, synthetic method technology, applied in the direction of nanotechnology, circuits, electrical components, etc. for materials and surface science, can solve problems such as industrialization difficulties, immature technology, and high price, and achieve good reduction performance and wide application range. Application prospect, low price effect

Active Publication Date: 2020-03-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high cost and immature technology, it is difficult to industrialize
The cathode oxygen reduction reaction is an important part of the fuel cell. Commercial cathode oxygen reduction catalysts mainly use Pt and Pt alloys. However, they are relatively expensive and easy to poison. It is imminent to develop low-cost and reliable alternatives.

Method used

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  • Synthesis of metal CO-supported N-doped three-dimensional porous carbon materials with excellent electrocatalytic oxygen reduction performance
  • Synthesis of metal CO-supported N-doped three-dimensional porous carbon materials with excellent electrocatalytic oxygen reduction performance
  • Synthesis of metal CO-supported N-doped three-dimensional porous carbon materials with excellent electrocatalytic oxygen reduction performance

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Experimental program
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preparation example Construction

[0026] A method for synthesizing a Co-supported N-doped three-dimensional porous carbon material with excellent electrocatalytic oxygen reduction performance, comprising the steps of:

[0027] 1) Dissolve 200 parts of ZIF-67 and 2000 parts of [VEIm][BF4] in 30 parts of anhydrous N,N-dimethylformamide solution, after ultrasonic dispersion; add 10 parts of 2,2'-azo For bis(isobutyronitrile), continue to sonicate for 5-30 minutes; pass nitrogen gas into the above solution for 10-60 minutes; seal the obtained solution, transfer it to an oil bath at 40-80°C, and stop stirring for 1-8 hours reaction;

[0028] 2) Pour the solution in step 1) into the acetone solution, obtain the precipitate by centrifugation and suction filtration, place the precipitate in a vacuum drying oven, and grind it to obtain a powder product after drying;

[0029] 3) Put the powder product in step 2) into a quartz boat, heat up to 600-900°C in a tube furnace under a nitrogen atmosphere, and maintain the tem...

Embodiment 1

[0034] Preparation of metal Co-supported N-doped three-dimensional porous carbon material Co@NPC-700:

[0035] Measure 30mL of anhydrous N,N-dimethylformamide solution (DMF) into a 100mL flask, and equip a stirring bar, add 200mg of ZIF-67 and 2000mg of [VEIm][BF4] into it, ultrasonically wait for ZIF-67 to disperse After homogenization, 10 mg of 2,2'-azobis(isobutyronitrile) was added thereto, and ultrasound was continued for 10 minutes. Next, nitrogen gas was passed through the above solution for 30 minutes to drive away the air dissolved in the solution. After the aeration is completed, seal the flask, transfer it to a preheated oil bath, and stop the reaction after stirring continuously at 65°C for 3 hours. After the reaction solution is cooled, pour it into 300mL acetone solution, centrifuge and filter to obtain a solid product. The product was dried in a vacuum oven at 60°C for 12 hours, then taken out, and ground to obtain the complex ZIF-67@PILs. Spread ZIF-67@PILs ...

Embodiment 2

[0038] Preparation of metal Co-supported N-doped three-dimensional porous carbon material Co@NPC-600:

[0039]Measure 30mL of anhydrous N,N-dimethylformamide solution (DMF) into a 100mL flask, and equip a stirring bar, add 200mg of ZIF-67 and 2000mg of [VEIm][BF4] into it, ultrasonically wait for ZIF-67 to disperse After homogeneity, add 10 mg of 2,2'-azobis(isobutyronitrile) to it, and continue to sonicate for 10 minutes. Next, nitrogen gas was passed through the above solution for 30 minutes to drive away the air dissolved in the solution. After the aeration is completed, seal the flask, transfer it to a preheated oil bath, and stop the reaction after stirring continuously at 65°C for 3 hours. After the reaction solution is cooled, pour it into 300mL acetone solution, centrifuge and filter to obtain a solid product. The product was dried in a vacuum oven at 60°C for 12 hours, then taken out, and ground to obtain the complex ZIF-67@PILs. Spread ZIF-67@PILs evenly in the qu...

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Abstract

The invention discloses a synthetic method of a metal Co-loaded N-doped three-dimensional porous carbon material having excellent electrocatalytic oxygen reduction performance. The method comprises the following steps: dissolving ZIF-67 and [VEIm][BF-4] in an absolute N,N-dimethyl formamide solution, and performing uniform dispersion; adding 2,2'-azobis, performing continuous ultrasonic wave; in oil bath, contrinoulsy stirring the components and then stopping a reaction; dumping the components in an acetone solution, performing centrifugation and pumping filtration to obtain precipitates, and drying and grinding the precipitates to obtain the powder product; roasting the powder product in a tubular furnace to obtain the black powder product; and using dilute sulfuric acid for processing the black powder product to obtain the metal Co-loaded N-doped three-dimensional porous carbon material. The metal Co-loaded N-doped three-dimensional porous carbon material has the beneficial effect that the metal Co is taken as a metal source, the earth reserves of the metal Co is abundant, the cost is low, during a material preparation process, the raw material utilization rate is high, the metal Co-loaded N-doped three-dimensional porous carbon material is environment friendly, and has excellent electrocatalytic oxygen reduction performance, methanol anti-toxic effect is stable, and the method has large economic benefit and social benefit, and has wide application prospect.

Description

technical field [0001] The invention relates to the field of inorganic nanometer materials and electrochemistry, in particular to a method for synthesizing metal Co-supported N-doped three-dimensional porous carbon materials with excellent electrocatalytic oxygen reduction performance. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy isothermally, efficiently, and environmentally friendly. Due to its high energy conversion efficiency, low pollution, low noise, high continuity and reliability, it has been regarded as the most environmentally friendly and reliable power generation device. However, due to its high cost and immature technology, industrialization is difficult. The cathodic oxygen reduction reaction is an important part of the fuel cell. Commercial cathodic oxygen reduction catalysts mainly use Pt and Pt alloys. However, they are expensive and easy to po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/96B82Y30/00
CPCB82Y30/00H01M4/9075H01M4/96Y02E60/50
Inventor 庄桂林王建国周祥
Owner ZHEJIANG UNIV OF TECH
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