Nitrogen-doped carbon-supported non-noble metal nano-catalyst prepared based on MOF

A nano-catalyst, non-precious metal technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of complex preparation process, high energy consumption and poor stability of non-precious metal catalysts, and achieve excellent catalytic stability, good stability, The effect of high catalytic activity

Active Publication Date: 2021-08-17
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a low-cost and low-energy-consumption simple preparation method for preparing non-noble metal catalysts based on MOF, aiming at the problems of complex preparation process, high energy consumption and poor stability of the existing MOF-based preparation of non-noble metal catalysts

Method used

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  • Nitrogen-doped carbon-supported non-noble metal nano-catalyst prepared based on MOF
  • Nitrogen-doped carbon-supported non-noble metal nano-catalyst prepared based on MOF
  • Nitrogen-doped carbon-supported non-noble metal nano-catalyst prepared based on MOF

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Effect test

Embodiment 1

[0037] Preparation of nitrogen-doped carbon-supported Co catalyst

[0038] (1) Add 3g of Co(NO 3 ) 2 ·6H 2 O and 4.95g of 2-methylimidazole were dissolved in 150ml of methanol respectively and magnetically stirred for 30min, then the latter solution was slowly added to the former solution with a dropper, and then the mixed solution was magnetically stirred at room temperature for 4h. After completion, centrifuge at 10,000 rpm for 5 minutes and wash with methanol three times. Finally, place the cleaned MOF crystals in a vacuum drying oven at 70 °C for 24 hours to obtain a MOF precursor.

[0039] (2) Weigh 100mg of the prepared MOF precursor and 90mg of nano-carbon powder, add it to the sesame cake, add 50ml of absolute ethanol, put it into a magnet and seal it with magnetic stirring for 24 hours. Turn on the mixed slurry with magnetic stirring to volatilize the ethanol until the slurry is viscous and becomes a paste, and then spread the viscous precursor slurry on the 30cm ...

Embodiment 2

[0042] Preparation of nitrogen-doped carbon-supported CoO catalyst

[0043] (1) Add 3g of Co(NO 3 ) 2 ·6H 2 O and 4.95g of 2-methylimidazole were dissolved in 150ml of methanol respectively and magnetically stirred for 30min, then the latter solution was slowly added to the former solution with a dropper, and then the mixed solution was magnetically stirred at room temperature for 4h. After completion, centrifuge at 10,000 rpm for 5 minutes and wash with methanol three times. Finally, place the cleaned MOF crystals in a vacuum drying oven at 70 °C for 24 hours to obtain a MOF precursor.

[0044] (2) Weigh 104mg of the prepared MOF precursor and 86mg of nano-carbon powder, add it to the sesame cake, add 50ml of absolute ethanol, put it into a magnet and seal it with magnetic force for 24 hours. Turn on the mixed slurry with magnetic stirring to volatilize the ethanol until the slurry is viscous and becomes a paste, and then spread the viscous precursor slurry on the 30cm 2 ...

Embodiment 3

[0047] Preparation of nitrogen-doped carbon-supported CoFe catalyst

[0048] (1) Add 3g of Co(NO 3 ) 2 ·6H 2 O and 0.2 g of ferric sulfate were dissolved in 150 ml of methanol, 4.95 g of 2-methylimidazole was also dissolved in 150 ml of methanol, the two solutions were magnetically stirred for 30 min, and then the latter solution was slowly added with a dropper into the former solution, then magnetically stirred the mixed solution at room temperature for 6 h, centrifuged at 10,000 rpm for 5 min and washed with methanol for 3 times after the reaction was completed, and finally placed the cleaned MOF crystals in a vacuum oven for 70 °C for 24 hours to obtain the MOF precursor.

[0049] (2) Weigh 100mg of the prepared MOF precursor containing both Co and Fe and 90mg of nano-carbon powder, add it to the biscuit, add 50ml of absolute ethanol, put it into a magnet and seal it with magnetic force for 24 hours. Turn on the mixed slurry with magnetic stirring to volatilize the etha...

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Abstract

The invention discloses a nitrogen-doped carbon-supported non-noble metal catalyst prepared on the basis of a metal organic framework material, a preparation method of the nitrogen-doped carbon-supported non-noble metal catalyst and application of the nitrogen-doped carbon-supported non-noble metal catalyst in catalytic oxygen reduction reaction. According to the nitrogen-doped carbon-supported non-noble metal catalyst, a metal organic framework material is used as a precursor, the surface of the metal organic framework material is modified with nano carbon powder, carbon cloth is coated with the nano carbon powder, and the nitrogen-doped carbon-supported non-noble metal catalyst is prepared through a transient Joule thermal method. The obtained catalyst has the characteristics of being controllable in component, stable in structure, uniform in distribution, capable of being directly applied to a fuel cell and the like, and has good catalytic activity and excellent catalytic stability in the field of catalytic oxygen reduction reaction of the fuel cell. Compared with a traditional nitrogen-doped carbon-supported non-noble metal catalyst prepared on the basis of a metal organic framework material, the nitrogen-doped carbon-supported non-noble metal catalyst has the advantages of simple preparation process, stable structure and suitability for industrial production, and is a catalyst with a good application prospect.

Description

technical field [0001] The patent of the invention belongs to the field of fuel cells, and specifically relates to a nitrogen-doped carbon-supported non-noble metal nanocatalyst with high catalytic stability and its preparation method and application. Background technique [0002] With the extensive exploitation and utilization of fossil energy, a series of environmental problems such as global warming and acid rain have also begun to appear. Therefore, human beings have begun to turn their attention to other clean and renewable new energy technologies. Fuel cell is a power generation technology that directly converts chemical energy into electrical energy. It is not limited by Carnot efficiency, but also has the advantages of high efficiency, stability and environmental friendliness. It can be developed as a new type of portable mobile power supply. One of the most promising new energy technologies in recent years. The cathode catalysts of fuel cells mainly rely on noble m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/9016H01M4/9041H01M4/9083H01M4/88Y02E60/50
Inventor 秦海英陈浩冬魏瑾杨韩旭斌倪华良褚雯肖学章刘嘉斌
Owner HANGZHOU DIANZI UNIV
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