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Non-noble metal bifunctional catalyst as well as preparation method and application thereof

A dual-functional catalyst and non-precious metal technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve insufficient electrical conductivity, instability of MOFs materials, etc. problem, to achieve the effect of improving physical and chemical activity, facilitating full exposure, and a wide range of effects

Active Publication Date: 2020-06-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, we also found that the application of MOFs materials in the field of electrocatalysis still faces severe challenges of activity and stability due to their own instability and insufficient electrical conductivity.

Method used

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  • Non-noble metal bifunctional catalyst as well as preparation method and application thereof
  • Non-noble metal bifunctional catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a, Preparation of carbon-based sheet material The carbon-based sheet material uses graphite oxide prepared by the Hummer method as a precursor, and the prepared graphite oxide is dispersed in deionized water at a concentration of 5 mg / ml, and ultrasonically stirred for 4 hours, and condensed to a solid state with liquid nitrogen, and placed in a freeze dryer for 24 hours of freeze-drying process until the solvent was completely removed; the above-mentioned dried samples were dispersed in concentrated nitric acid solution for deep oxidation, and condensed at room temperature under the condition of reflux Oxidation reaction for 4 hours, washing, filtering and drying for later use; disperse the above sample in deionized water at a concentration of 10 mg / ml, add melamine, the molar ratio of nitrogen to carbon is 1:1, and fully stir at 80 degrees Celsius for 4 hours , then condensed to a solid state with liquid nitrogen, placed in a freeze dryer for 24 hours of freeze-drying ...

Embodiment 2

[0041] a, Preparation of carbon-based sheet material The carbon-based sheet material uses graphite oxide prepared by the Hummer method as a precursor, and the prepared graphite oxide is dispersed in deionized water at a concentration of 10 mg / ml, and the ultrasonic stirring is continued for 8 Hours, condensed to solid state with liquid nitrogen, placed in a freeze dryer for 24 hours of freeze-drying process, until the solvent was completely removed; the above-mentioned dried samples were dispersed in concentrated nitric acid solution for deep oxidation, and condensed at 60 degrees Celsius under reflux conditions Under the oxidation reaction for 6 hours, wash, filter and dry for later use; disperse the above sample in deionized water according to the concentration of 10 mg per ml, add boric acid, the molar ratio of boron element to carbon is 2:1, and fully stir at 80 degrees Celsius for 4 hours, then condensed to a solid state with liquid nitrogen, placed in a freeze dryer and c...

Embodiment 3

[0044] a, Preparation of carbon-based sheet material The carbon-based sheet material uses graphite oxide prepared by the Hummer method as a precursor, and the prepared graphite oxide is dispersed in deionized water at a concentration of 1 mg / ml, and the ultrasonic stirring is continued for 2 Hours, condensed to solid state with liquid nitrogen, placed in a freeze dryer for 24 hours of freeze-drying process, until the solvent was completely removed; the above-mentioned dried samples were dispersed in concentrated nitric acid solution for deep oxidation, and condensed at 50 degrees Celsius under reflux conditions Under the oxidation reaction for 4 hours, wash, filter and dry for later use; disperse the above sample in deionized water according to the concentration of 20 mg per ml, add ferric chloride, the molar ratio of iron element to carbon is 1:5, fully Stir for 4 hours, then condense to a solid state with liquid nitrogen, place in a freeze dryer for 24 hours of freeze-drying ...

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Abstract

The invention relates to a non-noble metal lamellar structure composite material, in particular to a non-noble metal bifunctional catalyst, which comprises a dispersed graphene-based material lamella,the lamella is provided with through holes, and a lamellar metal organic framework material is attached in the through holes of the lamella in a manner of being parallel to the surface of the lamella. The catalyst has the advantages of high conductivity, large specific surface area, and high-density metal active sites, and can be widely applied to the fields of electrochemical catalysis, fuel cells, metal-air batteries and the like.

Description

technical field [0001] The invention relates to a non-noble metal lamellar structure composite material, in particular to a bifunctional electrocatalytic material which can be used for oxygen reduction and oxygen precipitation. [0002] The present invention also relates to a preparation method of the above-mentioned non-noble metal bifunctional catalyst. Background technique [0003] Electrochemical catalytic reactions play an irreplaceable role in important areas of the national economy such as energy technology, analysis and characterization technology, electronics and information technology, and material synthesis technology. The structural design and material synthesis of electrochemical catalysts is one of the core technologies in this field. With the continuous development of nanotechnology and in-depth research in the field of energy materials, new materials with nanoscale and their special physical and chemical properties have been widely used. Among them, metal-o...

Claims

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Application Information

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IPC IPC(8): B01J31/22C25B11/06C25B1/04
CPCB01J31/1691C25B1/04B01J2531/847B01J2531/845B01J2531/16B01J2531/0213C25B11/091B01J35/23B01J35/33Y02E60/36Y02E60/50
Inventor 王素力夏章讯孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI