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Preparation method of molybdenum disulfide-graphite-nickel phosphorus hydrogen evolution composite

A composite material, molybdenum disulfide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of improving the hydrogen evolution performance of molybdenum disulfide without increasing the ratio of edge/basal active sites Limited and limited engineering application value, etc., to achieve the effect of low preparation cost, simple molding process and good reusability

Active Publication Date: 2016-07-27
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Throughout the research conducted by scholars at home and abroad in the field of molybdenum disulfide catalytic hydrogen evolution, the thinning of the stacked layer thickness through the exfoliation and intercalation process did not increase the ratio of its edge / basal surface active sites, so the improvement of the hydrogen evolution performance of molybdenum disulfide is limited.
At the same time, a material with excellent electrical conductivity is used as a carrier, and nano-molybdenum disulfide is prepared on its surface to improve its internal electrical conductivity. To a certain extent, its engineering application value is limited

Method used

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  • Preparation method of molybdenum disulfide-graphite-nickel phosphorus hydrogen evolution composite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Pretreatment of graphite powder:

[0045] First, 5g of graphite powder with an average particle size of 0.5μm is added to a beaker containing 250mL distilled water, heated and boiled for 3h, then the suspension solution is naturally cooled to room temperature, and the graphite powder is collected by filtration; 5g of the collected graphite powder is put into 50g mass percent concentration Soak in 3% nitric acid solution for 30 minutes, then centrifuge the graphite powder, and centrifugally wash the graphite powder with distilled water until the washing water is neutral; then place the washed graphite powder in an oven and dry at 80°C. Grind it into an ultrafine powder with an average particle size of 0.5 μm with an agate mortar;

[0046] (2) preparation of graphite-nickel phosphorus powder used electroless plating solution:

[0047] Add 25g of nickel sulfate, 10g of citric acid, 3g of succinic acid, 3g of sodium acetate and 3g of ammonium bifluoride into a beaker f...

Embodiment 2

[0056] (1) Pretreatment of graphite powder:

[0057] First, 5g of graphite powder with an average particle size of 0.5μm is added to a beaker containing 250mL distilled water, heated and boiled for 3h, then the suspension solution is naturally cooled to room temperature, and the graphite powder is collected by filtration; 5g of the collected graphite powder is put into 50g mass percent concentration Soak in 3% nitric acid solution for 30 minutes, then centrifuge the graphite powder, and centrifugally wash the graphite powder with distilled water until the washing water is neutral; then place the washed graphite powder in an oven and dry at 80°C. Grind it into an ultrafine powder with an average particle size of 0.5 μm with an agate mortar;

[0058] (2) preparation of graphite-nickel phosphorus powder used electroless plating solution:

[0059] Add 27g of nickel sulfate, 12g of citric acid, 3.5g of succinic acid, 3.6g of sodium acetate and 3.5g of ammonium bifluoride into a be...

Embodiment 3

[0067] (1) Pretreatment of graphite powder:

[0068] First, 5g of graphite powder with an average particle size of 0.5μm is added to a beaker containing 250mL distilled water, heated and boiled for 3h, then the suspension solution is naturally cooled to room temperature, and the graphite powder is collected by filtration; 5g of the collected graphite powder is put into 50g mass percent concentration Soak in 3% nitric acid solution for 30 minutes, then centrifuge the graphite powder, and centrifugally wash the graphite powder with distilled water until the washing water is neutral; then place the washed graphite powder in an oven and dry at 80°C. Grind it into an ultrafine powder with an average particle size of 0.5 μm with an agate mortar;

[0069] (2) preparation of graphite-nickel phosphorus powder used electroless plating solution:

[0070] 28g nickel sulfate, 14g citric acid, 4g succinic acid, 4.4g sodium acetate and 4.5g ammonium bifluoride are added successively in the ...

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Abstract

A preparation method of a molybdenum disulfide-graphite-nickel phosphorus hydrogen evolution composite mainly comprises the steps that firstly, graphite-nickel phosphorus powder is prepared with a chemical composite plating technology and then is subjected to oxidation treatment to carry oxygen-containing functional groups; then, with the graphite-nickel phosphorus powder obtained after oxidation treatment as a carrier, molybdenum disulfide nano-micro-crystals are grown on the surface of the graphite-nickel phosphorus powder, and the molybdenum disulfide-graphite-nickel phosphorus composite is prepared. In preparation of the composite, crystal form transformation from microcrystals and amorphous bodies to nickel phosphide happens to nickel phosphorus alloy, and stripping transformation from a stacked layer structure to a single layer structure happens to molybdenum disulfide. The method is easy and convenient to implement and low in cost, and the prepared molybdenum disulfide-graphite-nickel phosphorus composite has good lubrication performance, wear resistance, corrosion resistance and use stability and also has good electro-catalysis hydrogen evolution performance.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a preparation method of a modified molybdenum disulfide hydrogen evolution composite material. Background technique [0002] In today's world, with the rapid economic development and the accelerated pace of social progress, the demand for energy such as coal and oil is also increasing rapidly, which objectively leads to increasingly severe energy shortages, as well as air pollution, water pollution, soil pollution and ecological degradation. A range of environmental issues. Therefore, it is wise to take the road of sustainable development, coordinate economic development and social progress with natural ecological protection, and develop and utilize clean energy. Like solar energy, wind energy, and geothermal energy, hydrogen, as a storable, pollution-free, and renewable high-quality energy, has increasingly attracted great attention from all over the world. Electrochemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/19C25B1/02C25B11/06
CPCB01J27/19C25B1/02C25B11/04
Inventor 宋来洲牛丽静石轩铭闫佳芸张英莉
Owner YANSHAN UNIV
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