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Hydrogen evolution reaction catalyst nanosheet layer-graphene three-dimensional composite material and preparation method thereof

A hydrogen evolution reaction and nanosheet technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, nanotechnology, etc., can solve the problems that the morphology, active site and specific surface area of ​​transition metal dichalcogenides cannot be guaranteed. , to achieve the effect of broad industrial application prospect, convenient operation process and low production cost

Inactive Publication Date: 2015-07-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of growing transition metal dichalcogenides on graphene needs to be carried out in solvothermal, which does not guarantee the morphology, active sites and specific surface area of ​​the transition metal dichalcogenides obtained.

Method used

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  • Hydrogen evolution reaction catalyst nanosheet layer-graphene three-dimensional composite material and preparation method thereof
  • Hydrogen evolution reaction catalyst nanosheet layer-graphene three-dimensional composite material and preparation method thereof
  • Hydrogen evolution reaction catalyst nanosheet layer-graphene three-dimensional composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 0.1 g of molybdenum disulfide powder and place it in 100 mL of N-methylpyrrolidone, and ultrasonically disperse for 6 hours to form dispersion A. Then 0.8 g of graphene oxide was placed in 100 mL of water and ultrasonically dispersed for 24 hours to obtain dispersion B. Take 10 mL of dispersion B and put it in a hydrothermal kettle, then add 20 mL of dispersion A respectively, then sonicate for 3 hours, and then heat the mixture to 200 o C for 12 hours. After the reaction was completed, the hydrothermal kettle was cooled, and the product was taken out, and dialyzed in water for 7 days to remove the solvent and other water-soluble impurities. Finally, the columnar product was frozen in liquid nitrogen, and then freeze-dried with a freeze dryer for 5 days to obtain an airgel.

[0021] From figure 1 It can be seen that the prepared molybdenum disulfide nanosheet-graphene composite has a very obvious pore structure, indicating that its specific surface area is larg...

Embodiment 2

[0023] Take 0.3 g of molybdenum disulfide powder and place it in 50 mL of N,N-diformamide, and ultrasonically disperse for 24 hours to form dispersion A. Then 0.08 g of graphene oxide was placed in 10 mL of water and ultrasonically dispersed for 3 hours to obtain dispersion B. Take 10 mL of dispersion B and put it in a hydrothermal kettle, then add 1 mL of dispersion A respectively, then sonicate for 0.5 hours, and then heat the mixture to 140 o C for 18 hours. After the reaction was completed, the hydrothermal kettle was cooled, and the product was taken out, and dialyzed in water for 5 days to remove the solvent and other water-soluble impurities. Finally, the columnar product was frozen in liquid nitrogen, and then freeze-dried with a freeze dryer for 3 days to obtain an airgel.

Embodiment 3

[0025] Take 0.1 g of tungsten disulfide powder and place it in 30 mL of formamide, and ultrasonically disperse for 18 hours to form dispersion A. Then 0.5 g of graphene oxide was placed in 50 mL of water and ultrasonically dispersed for 12 hours to obtain dispersion B. Take 10 mL of dispersion B and put it in a hydrothermal kettle, then add 1 mL of dispersion A respectively, then sonicate for 0.5 hours, and then heat the mixture to 140 o C for 24 hours. After the reaction was completed, the hydrothermal kettle was cooled, and the product was taken out, and dialyzed in water for 5 days to remove the solvent and other water-soluble impurities. Finally, the columnar product was frozen in liquid nitrogen, and then freeze-dried with a freeze dryer for 3 days to obtain an airgel.

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Abstract

The invention belongs to the technical field of catalytic materials and particularly relates to a hydrogen evolution reaction catalyst nanosheet layer-graphene three-dimensional composite material and a preparation method thereof. A hydrogen evolution reaction catalyst nanosheet layer and graphene sheets are assembled into a three-dimensional network structure with a solvent-thermal method, the three-dimensional network structure is used for improving the electronic conduction efficiency of the hydrogen evolution reaction catalyst nanosheet layer and promoting contact of the catalyst nanosheet layer with an electrolyte and an electrode so as to improve the catalytic efficiency; besides, the specific surface area and the catalytic active sites of the catalyst can be increased with a mixed solvent-thermal method, and finally, the catalytic activity of the catalyst is improved. The hydrogen evolution reaction catalyst nanosheet layer-graphene three-dimensional composite material and the preparation method thereof have the advantages of convenience in operation process, simple preparation conditions, lower production cost, easiness in batch production and broad industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a hydrogen evolution reaction catalyst nanosheet-graphene three-dimensional composite material and a preparation method thereof. Background technique [0002] Energy and environmental problems in today's world make people look for renewable clean energy to replace traditional fossil energy. Among them, hydrogen energy has attracted much attention because of its wide range of sources and the combustion product of water. However, until now, hydrogen energy has been mainly derived from water, and highly efficient catalysts for hydrogen generation in water are based on metal platinum. Metal platinum is expensive and has poor anti-pollution ability and service life, which has caused the high cost of hydrogen production. Recently, researchers have found that the binding energy of transition metal dichalcogenides to hydrogen is similar to that of metal platinum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J27/047B01J27/057B82Y30/00B82Y40/00
Inventor 徐胜杰雷周玥武培怡
Owner FUDAN UNIV
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