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Hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite and preparation

A nano-composite material, nitrogen-doped carbon technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high cost, limited supply, and difficulty in large-scale implementation, and achieve electrical conductivity Good, avoid agglomeration, the effect of stable physical and chemical properties

Inactive Publication Date: 2019-01-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, platinum-based noble metals are considered to be the most effective catalysts for HER, but their high cost and limited supply make it difficult to implement on a large scale

Method used

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  • Hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite and preparation
  • Hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite and preparation
  • Hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite and preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A hollow cobalt-nickel oxide-coated nitrogen-doped carbon nanocomposite material, comprising a hollow nitrogen-doped carbon material, the hollow nitrogen-doped carbon material is coated with cobalt-nickel oxide, and the hollow cobalt-nickel oxide-coated The preparation method of nitrogen-doped carbon nanocomposite material is:

[0044] Step 1: Synthesis of hollow nitrogen-doped carbon:

[0045] Disperse the ZIF-67 powder in 100 mL of water, and ultrasonically treat it for 20 min to obtain a uniform dispersion with a ZIF-67 concentration of 1 mg / mL. Then 20 μL of aniline (Sigma-Aldrich) monomer was added into the above dispersion liquid to make it uniformly dispersed. Subsequently, 0.95 g of ammonium persulfate (Sinopharm Chemical Reagent Co., Ltd.) was dissolved in 30 mL of deionized water, and after ultrasonic treatment for 10 min, it was added to the above dispersion liquid and stirred for 12 h. The obtained precipitate was centrifuged, washed three times with deioniz...

Embodiment 2

[0049] A cobalt-nickel oxide hollow nitrogen-doped carbon nanocomposite material, the preparation method of which is:

[0050] Step 1: Synthesis of hollow nitrogen-doped carbon:

[0051] Disperse the ZIF-67 powder in 100 mL of water, and ultrasonically treat it for 20 min to obtain a uniform dispersion with a ZIF-67 concentration of 1 mg / mL. Then 30 μL of aniline (Sigma-Aldrich) monomer was added into the above dispersion liquid to make it uniformly dispersed. Subsequently, 0.95 g of ammonium persulfate (Sinopharm Chemical Reagent Co., Ltd.) was dissolved in 30 mL of deionized water, and after ultrasonic treatment for 10 min, it was added to the above dispersion liquid and stirred for 12 h. The obtained precipitate was centrifuged, washed three times with deionized water, and dried at 60°C for 12 hours to obtain the ZIF-67@polyaniline composite material. The powder of the ZIF-67@polyaniline composite material was immersed in a 1mol / L hydrochloric acid solution, stirred and r...

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Abstract

The invention provides a hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite. The hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite is characterized by comprising a hollow nitrogen-doped carbon material, and the hollow nitrogen-doped carbon material is coated with nickel cobalt oxide. The prepared composite has the shape of a hollow structure, the polyaniline-derived hollow nitrogen-doped porous carbon material supports the hollow polyhedron structure of the composite, the nickel cobalt oxide evenly grows outside the hollow nitrogen-doped carbon material, the problem of coagulation of the nickel cobalt oxide is avoided, and the hollow nickel cobalt oxide coated nitrogen-doped carbon nano composite has the advantages of being large in specific area, good in electrical conductivity, stable in physicochemical property, excellent in electro-chemical property and the like.

Description

technical field [0001] The invention belongs to the technical field of metal oxide-carbon materials, and specifically relates to a hollow cobalt-nickel oxide-coated nitrogen-doped carbon nanocomposite material and a preparation method thereof. Background technique [0002] As a sustainable, green and renewable energy source, molecular hydrogen (H 2 ) has received increasing attention. Compared with other fuel energy sources, H 2 It has many advantages such as high energy density and no greenhouse gas after combustion. Under the background of today's large demand for hydrogen energy, the hydrogen evolution reaction (HER) has aroused strong interest, which can realize the function of directly producing hydrogen from water. In order for HER to proceed efficiently, it is necessary to provide a catalyst with high activity. Currently, platinum-based noble metals are considered to be the most effective HER catalysts, but their high cost and limited supply make their large-scale...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/00B01J35/10C25B1/04C25B11/06
CPCC25B1/04B01J27/24B01J37/0018C25B11/091B01J35/61B01J35/60Y02E60/36
Inventor 刘天西赖飞立宗伟缪月娥
Owner DONGHUA UNIV