Method for preparing platinum-graphene-molybdenum sulfide composite material by low-temperature plasma

A technology of low-temperature plasma and low-temperature plasma, which is applied in the field of preparing platinum-graphene-molybdenum sulfide composite materials by plasma, can solve the problem that the synthesis process cannot control nitrogen doping, etc., and achieve easy control of the reaction process, avoiding the synthesis process, and the conditions less demanding effect

Inactive Publication Date: 2020-01-07
CAS HEFEI INST OF TECH INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to: aim at the problems existing in the prior art, provide a kind of method for preparing platinum-graphene-molybdenum sulfide composite material by low-temperature plasma, this method simplifies existing complicated method and harsh condition requirement, overcomes The synthesis process in the prior art cannot regulate the regulation of nitrogen doping type at low temperature and low pressure, which is conducive to large-scale production

Method used

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  • Method for preparing platinum-graphene-molybdenum sulfide composite material by low-temperature plasma

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Embodiment 1

[0027] The present invention proposes a new preparation method of platinum / molybdenum sulfide-graphene composite material, which can prepare molybdenum sulfide material with 3D dendritic structure, and can effectively compound with carbon nitride substrate to form a specific heterogeneous The junction structure has broad application prospects in the field of electrocatalytic hydrogen production.

[0028] Such as figure 1 As shown, the method included in the present invention is: mix 1mL of 24.09mmol / L potassium chloroplatinate, 5mL of molybdenum sulfide of the same concentration and 5mL of graphene oxide solution to obtain a mixed solution; carry out ultrasonication on the mixed solution for 20-40min, 30min, to obtain Dispersion liquid: Centrifuge the dispersion liquid at a speed of 5000-12000rbm for 5-30min. Freeze-dry the isolated precipitated compound at minus 20°C to minus 50°C; then, the dried powder is subjected to low-temperature plasma discharge in a hydrogen atmosphe...

Embodiment 2

[0030] The methods included in the present invention include: mixing 1mL of 24.09mmol / L potassium chloroplatinate, 5mL of 2mg / ml molybdenum sulfide and 5mL of 2mg / ml graphene oxide solution to obtain a mixed solution; ultrasonicating the mixed solution for 30min to obtain a dispersion ; Carry out centrifugation on the dispersion liquid, the speed of centrifugation is 5000-12000rbm, and the time is 5-30min. Freeze-dry the isolated precipitated compound at minus 20°C to minus 50°C; then, the dried powder is subjected to low-temperature plasma discharge in a hydrogen atmosphere, the temperature of low-temperature plasma discharge is 30-50°C, and the pressure is 70Pa. The discharge power is 100W, the discharge time is 40min, and the hydrogen flow rate is 25sccm. The mass ratio of graphene and molybdenum sulfide is 1:1.

[0031] In the present embodiment, it has also been verified that the product obtained by the present invention has a good effect through various data:

[0032] ...

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Abstract

The invention provides a method for preparing a platinum-graphene-molybdenum sulfide composite material by low-temperature plasma. The method comprises the following steps: potassium chloroplatinate with the concentration of 24.09 mmol / L is mixed with a molybdenum sulfide solution and a graphene oxide solution with the same concentration according to a volume ratio of 1:5:5 to obtain a mixed solution; the mixed solution is subjected to ultrasonic treatment for 20-40 min to obtain a dispersion; the dispersion is centrifuged and separated, and a precipitate compound obtained by separation is freeze-dried; and the above obtained powder is subjected to low-temperature plasma discharge in a hydrogen atmosphere to obtain the platinum-graphene-molybdenum sulfide compound. Compared with the priorart, the method of the invention has the advantages of simplicity, low condition requirements, suitableness for large-scale production, benefit increase and cost reduction.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a method for preparing a platinum-graphene-molybdenum sulfide composite material by low-temperature plasma. Background technique [0002] Graphene has many excellent physical and chemical properties such as high electrical conductivity, high specific surface area, and high specific strength, so it is widely used in fuel cell catalysts, adsorbents, and electrode materials for supercapacitors. Molybdenum sulfide can effectively adjust the structure of graphene, which plays an important role in improving the performance of materials. For example, when nitrogen-doped graphene is used as a supercapacitor electrode material, the specific capacity of the electrode material is not only related to the amount of nitrogen doping, but also related to The type of nitrogen doping is related, that is, graphitized nitrogen can effectively reduce the charge transfer resist...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01G39/06C22B3/00C01B3/32
CPCC01B3/326C01B32/184C01B2203/1041C01B2203/107C01B2203/1223C01G39/06C01P2002/72C01P2002/82C01P2002/85C01P2004/04C22B11/04Y02P10/20
Inventor 王奇
Owner CAS HEFEI INST OF TECH INNOVATION
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