Layered two-dimensional material interlayer-confined metal or metal compound composite material as well as preparation method and application thereof

A metal compound, two-dimensional material technology, applied in chemical instruments and methods, catalyst activation/preparation, nanotechnology for materials and surface science, etc. active effect

Active Publication Date: 2018-09-28
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that reducing the thickness of molybdenum disulfide can expose more molybdenum disulfide edge sites with hydrogen evolution activity, thereby greatly improving the catalytic activity of molybdenum disulfide; but for

Method used

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  • Layered two-dimensional material interlayer-confined metal or metal compound composite material as well as preparation method and application thereof
  • Layered two-dimensional material interlayer-confined metal or metal compound composite material as well as preparation method and application thereof
  • Layered two-dimensional material interlayer-confined metal or metal compound composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0068] Example 1

[0069] Under the protection of argon, disperse two-dimensional molybdenum disulfide (1g) in n-butyl lithium cyclohexane solution (2.0M, 15 mL) for lithiation (48h), and use cyclohexane alternately to dilute the product and High-speed (5000rpm) centrifugation (30min) three times respectively, take the bottom layer and dry it naturally under argon protection. Followed by dry lithiated molybdenum disulfide: CoCl 2 ·6H 2 The ratio of O:tetrahydrofuran is 100mg:2.56g:18mL. The mixture is sealed in a hydrothermal reaction kettle. The pH of the reaction kettle system is 9.88. The hydrothermal temperature is controlled to 80℃ and the holding time is 48 hours. After the reaction, it is naturally cooled to room temperature. , The product obtained is a two-dimensional molybdenum disulfide confined metal hydroxide (cobalt hydroxide) composite material, which is an efficient electrocatalyst. Synthetic schematic diagram of this two-step method figure 1 Shown.

[0070] Then c...

Example Embodiment

[0078] Example 2

[0079] Under the protection of argon, disperse two-dimensional molybdenum disulfide (1g) in n-butyl lithium cyclohexane solution (2.0M, 15 mL) for lithiation (72h), and use cyclohexane alternately to dilute the product and High-speed (8000rpm) centrifugation (20min) three times respectively, take the bottom layer and dry it naturally under the protection of argon gas. Followed by dry lithiated molybdenum disulfide: CoCl 2 ·6H 2 The ratio of O:tetrahydrofuran is 100mg:0.256g:18mL, and the mixture is sealed in a hydrothermal reactor. The pH of the reactor system is 8.5. The hydrothermal temperature is controlled to 80℃ and the holding time is 24 hours. After the reaction, it is naturally cooled to At room temperature, the product obtained is a composite material of two-dimensional molybdenum disulfide confined metal hydroxide (cobalt hydroxide). The schematic diagram of the two-step synthesis is as figure 1 Shown.

[0080] The structure of the composite material ...

Example Embodiment

[0081] Example 3

[0082] Disperse two-dimensional molybdenum disulfide (0.5g) in n-butyl lithium cyclohexane solution (2.0M, 15mL) for lithiation (72h) under the protection of argon, and use cyclohexane alternately to dilute the product and High-speed (8000rpm) centrifugation (20min) three times respectively, take the bottom layer and dry it naturally under argon protection. Followed by dried lithiated molybdenum disulfide: NiCl 2 ·6H 2 The ratio of O:tetrahydrofuran is 100mg:0.274g:18mL and the mixture is sealed in a hydrothermal reactor. The pH of the reactor system is 10, the hydrothermal temperature is controlled to 80℃, and the holding time is 48 hours. After the reaction, it is naturally cooled to At room temperature, the product obtained is a two-dimensional molybdenum disulfide confined metal hydroxide (nickel hydroxide) composite material, which is an efficient electrocatalyst. The schematic diagram of this two-step synthesis is as follows figure 1 Shown.

[0083] Figu...

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Abstract

The invention discloses a layered two-dimensional material interlayer-confined metal or metal compound composite material as well as a preparation method and application thereof. The composite material comprises a layered two-dimensional material and a metal or metal compound confined among layers of the layered two-dimensional material. The method comprises the following steps: 1) performing lithiation treatment on the layered two-dimensional material to obtain a lithiated layered two-dimensional material; and 2) mixing the dried lithiated layered two-dimensional material, a metal salt and asolvent, performing sealing in a reaction kettle, and performing a hydrothermal reaction to obtain the layered two-dimensional material interlayer-confined metal or metal compound composite material.The preparation method disclosed by the invention can realize controllable preparation of a series of two-dimensional material interlayer-confined metal and metal compound composite materials; and theprepared composite material, especially a two-dimensional molybdenum disulfide interlayer-confined metal hydroxide composite material has the advantages of high electrocatalytic activity and good stability when being used as a hydrogen evolution catalyst, and has application prospects in the field of production of hydrogen by electrolysis of water.

Description

technical field [0001] The invention belongs to the field of composite material preparation and hydrogen production catalysts, and relates to a composite material of a layered two-dimensional material interlayer confinement metal or a metal compound, its preparation method and application, in particular to a two-dimensional molybdenum disulfide interlayer confinement A composite material of a domain metal hydroxide, a preparation method thereof, and an application thereof as a high-efficiency hydrogen evolution electrocatalyst for the hydrogen evolution reaction of electrolyzed water. Background technique [0002] At present, the excessive use of fossil energy by humans has led to increasingly prominent environmental and energy problems. Using electrochemical catalysis to decompose water to produce hydrogen is an effective method for renewable energy conversion, and it is also the safest and most effective technology that is expected to solve the current energy crisis. Howev...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/10B01J37/30B82Y30/00B82Y40/00C25B11/06C25B1/04
CPCC25B1/04B82Y30/00B82Y40/00B01J27/0515B01J35/0033B01J37/10B01J37/30C25B11/091Y02E60/36
Inventor 刘碧录罗雨婷
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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