A kind of preparation method of nickel phosphorus/molybdenum disulfide hydrogen evolution composite material

A technology of molybdenum disulfide and composite materials, which is applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of not improving the ratio of edge/basal active points, limited improvement of molybdenum disulfide hydrogen evolution performance, and low hydrogen evolution catalytic activity. Achieve the effects of easy control of the implementation process, good reusability, and improved catalytic hydrogen evolution activity

Active Publication Date: 2018-04-03
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface of the coating prepared by this technology is uniform and smooth, but its specific surface area is small and its hydrogen evolution catalytic activity is not high.
In addition, there are also research reports that the chemical composite plating technology is used to add molybdenum disulfide ultrafine particles to the electroless nickel phosphorus plating solution to obtain nickel phosphorus-molybdenum disulfide composite coatings, but the composite coatings prepared by this technology have excellent properties. Friction and lubrication properties, but its catalytic hydrogen evolution performance is not good
[0005] The application of exfoliation and intercalation to reduce the thickness of the accumulation layer of molybdenum disulfide does not increase the ratio of active sites on the edge / basal surface, and the hydrogen evolution performance of molybdenum disulfide is limited.
In addition, the use of materials with excellent electrical conductivity as the carrier, and the preparation of nano-molybdenum disulfide on its surface can improve the electrical conductivity inside the molybdenum disulfide, but the materials currently reported as carriers have defects such as complicated preparation process and high cost. It also limits its engineering application value
Generally speaking, there are few research reports on improving the catalytic activity of molybdenum disulfide (002) surface. Therefore, modifying the surface of molybdenum disulfide (002) to improve its catalytic hydrogen evolution performance will be an important way to improve the catalytic hydrogen evolution performance of molybdenum disulfide. Beneficial attempt at performance

Method used

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  • A kind of preparation method of nickel phosphorus/molybdenum disulfide hydrogen evolution composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Preparation of layered molybdenum disulfide particles:

[0044] First, 20g of deionized water was added into the beaker, then 1.4g of ammonium molybdate and 0.3g of thiourea were added into the deionized water in turn, magnetically stirred to completely dissolve it, and then the solution was transferred into a 25mL, In a stainless steel reaction kettle lined with polytetrafluoroethylene, tighten the sealing cover of the stainless steel reaction kettle, and place the reaction kettle in an electric furnace with a furnace temperature of 200°C. At this temperature, the ammonium molybdate and sulfur in the solution After 24 hours of urea hydrothermal reaction, turn off the power supply of the electric furnace to allow it to cool naturally to room temperature, then open the furnace door to take the stainless steel reaction kettle out of the electric furnace, open the sealing cover of the stainless steel reaction kettle, and centrifuge the solution in the reaction kettle. T...

Embodiment 2

[0056] (1) Preparation of layered molybdenum disulfide particles:

[0057] First, 20g of deionized water was added into the beaker, then 1.4g of ammonium molybdate and 0.3g of thiourea were added into the deionized water in turn, magnetically stirred to completely dissolve it, and then the solution was transferred into a 25mL, In a stainless steel reaction kettle lined with polytetrafluoroethylene, tighten the sealing cover of the stainless steel reaction kettle, and place the reaction kettle in an electric furnace with a furnace temperature of 200°C. At this temperature, the ammonium molybdate and sulfur in the solution After 24 hours of urea hydrothermal reaction, turn off the power supply of the electric furnace to allow it to cool naturally to room temperature, then open the furnace door to take the stainless steel reaction kettle out of the electric furnace, open the sealing cover of the stainless steel reaction kettle, and centrifuge the solution in the reaction kettle. T...

Embodiment 3

[0068] (1) Preparation of layered molybdenum disulfide particles:

[0069] First, 20g of deionized water was added into the beaker, then 1.4g of ammonium molybdate and 0.3g of thiourea were added into the deionized water in turn, magnetically stirred to completely dissolve it, and then the solution was transferred into a 25mL, In a stainless steel reaction kettle lined with polytetrafluoroethylene, tighten the sealing cover of the stainless steel reaction kettle, and place the reaction kettle in an electric furnace with a furnace temperature of 200°C. At this temperature, the ammonium molybdate and sulfur in the solution After 24 hours of urea hydrothermal reaction, turn off the power supply of the electric furnace to allow it to cool naturally to room temperature, then open the furnace door to take the stainless steel reaction kettle out of the electric furnace, open the sealing cover of the stainless steel reaction kettle, and centrifuge the solution in the reaction kettle. T...

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Abstract

A preparation method of nickel-phosphorus and molybdenum disulfide hydrogen-evolution composite mainly comprises: using ammonium molybdate, thiourea, nickel sulfate, sodium hypophosphite, citric acid, succinic acid, sodium acetate, ammonium bifluoride, N,N'-dimethylacetamide, stannous chloride, palladium chloride and hydrochloric acid as main reagents, preparing layered molybdenum disulfide particles first, then stripping the particles, subjecting the stripped molybdenum disulfide to sensitization and activation, depositing a nickel-phosphorus coating layer to the surface of the molybdenum disulfide by chemical plating, and thermally treating the molybdenum disulfide in nitrogen protective atmosphere to obtain the nickel-phosphorus and molybdenum disulfide hydrogen-evolution composite. The preparation process of the invention is simple, an implementation process is easy to control, the prepared nickel-phosphorus and molybdenum disulfide composite has good wear resistance and good catalytic hydrogen evolution, hydrogen evolution of molybdenum disulfide can be greatly improved, and hydrogen energy development and utilization can be effectively promoted.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a method for preparing a hydrogen evolution composite material. Background technique [0002] With the advancement of the exploration and utilization of fossil energy and the rapid growth of social economy, the problems of energy shortage and environmental pollution have become increasingly prominent, which have become one of the main constraints on the sustainable development of countries around the world. Therefore, in order to alleviate the pressure brought by energy consumption and environmental pollution, research and development and promote the use of new clean energy, vigorously develop a low-carbon economy, and ensure sustainable social development have become urgent issues that need to be solved by countries all over the world. As a non-polluting clean energy, hydrogen is one of the ideal substitutes for fossil energy. Its development and utilization wi...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B01J27/19C25B1/02C25B11/06
CPCB01J27/19C25B1/02C25B11/04
Inventor宋来洲石轩铭闫佳芸牛丽静张英莉
OwnerYANSHAN UNIV