Preparation method of WS2/FeS nanosphere hybrid catalyst and application thereof

A technology of catalysts and nanospheres, applied in the fields of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of no WS2 and FeS phase mixture research, no disclosure of the performance advantages and disadvantages of WS2 and FeS phase mixtures, etc. problems, to achieve the effect of controllable shape, uniform size and simple operation

Active Publication Date: 2021-02-05
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Through the above analysis, although there are many phase mixtures in the prior art, there is no research on WS 2 and FeS phase mixture studies, nor for WS 2 Relevant disclosures about the performance of the FeS phase mixture

Method used

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  • Preparation method of WS2/FeS nanosphere hybrid catalyst and application thereof
  • Preparation method of WS2/FeS nanosphere hybrid catalyst and application thereof
  • Preparation method of WS2/FeS nanosphere hybrid catalyst and application thereof

Examples

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preparation example Construction

[0035] like figure 1 As shown, the WS provided by the present invention 2 The preparation method of FeS nanosphere hybrid catalyst comprises the following steps:

[0036] S101: Dissolving tungsten hexacarbonyl and sulfur powder in an organic solvent under the protection of nitrogen, stirring for several minutes, then adding iron pentacarbonyl dropwise;

[0037]S102: After continuing to stir the mixture at room temperature for a period of time, the mixture is transferred to a stainless steel high-pressure reactor, and the reactor is placed in an oven to keep warm for a period of time and then cooled;

[0038] S103: After the reactor was cooled to room temperature, the mixture was centrifuged and washed to obtain a black precipitate, which was subjected to ultrasonic treatment and washed several times with deionized water and acetone; dried in a freeze dryer to obtain WS 2 / FeS nanosphere hybrid catalyst.

[0039] The WS provided by the embodiment of the present invention 2 ...

Embodiment 1

[0049] Example 1: Preparation of WS according to the invention 2 / FeS nanosphere hybrid catalyst

[0050] First, 0.33g of sublimed sulfur powder and 0.6g; 0.88g; 1.23g of tungsten hexacarbonyl were dissolved in three parts of 35mL organic solvent under the protection of nitrogen, and fully stirred. Then, 1 mL of iron pentacarbonyl was added dropwise under the protection of nitrogen. Then, the mixture was rapidly magnetically stirred at room temperature for 20 min, then the mixture was transferred to a stainless steel autoclave, and the autoclave was placed in an oven at 230 ° C for 24 h; finally, the autoclave was cooled to room temperature, The mixture was washed by centrifugation to obtain a black precipitate. The above black precipitate was ultrasonically dispersed, washed alternately with deionized water and acetone several times, finally collected by centrifugation, and dried in a vacuum freeze dryer for 2 hours to obtain a black product.

[0051] The properties of the ...

Embodiment 2

[0055] Embodiment 2: WS provided by the embodiment of the present invention 2 / FeS nanosphere hybrid catalyst comprises the following steps:

[0056] Firstly, under the protection of nitrogen, 0.5g of sublimed sulfur powder and 0.6g; 0.88g; 1.23g of tungsten hexacarbonyl were dissolved in three parts of 35mL organic solvent, and fully stirred. Then, 1 mL of iron pentacarbonyl was added dropwise under the protection of nitrogen. Then, the mixture was rapidly magnetically stirred at room temperature for 20 min, then the mixture was transferred to a stainless steel autoclave, and the autoclave was placed in an oven at 230 ° C for 24 h; finally, the autoclave was cooled to room temperature, The mixture was washed by centrifugation to obtain a black precipitate. The above black precipitate was ultrasonically dispersed, washed alternately with deionized water and acetone several times, finally collected by centrifugation, and dried in a vacuum freeze dryer for 2 hours to obtain a b...

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Abstract

The invention discloses a preparation method of a WS2/FeS nanosphere hybrid catalyst, which comprises the following steps: S101, dissolving tungsten hexacarbonyl and sulfur powder in an organic solvent under the protection of inert gas, uniformly mixing, dropwisely adding a certain amount of iron pentacarbonyl, and uniformly mixing at room temperature to obtain a brown mixed solution; S102, fullyreacting the brown mixed solution in a high-pressure reaction kettle at the temperature of 100 DEG C and 250 DEG C to obtain a mixture; preferably, the brown mixed solution is fully reacted for 10-24hours; and S103, cooling the reacted high-pressure reaction kettle to room temperature, centrifuging the mixture to obtain a black precipitate, and purifying the black precipitate to obtain the product. The invention provides the WS2/FeS nanosphere hybrid catalyst prepared by the method and an application of the WS2/FeS nanosphere hybrid catalyst. The preparation method of the WS2/FeS nanosphere hybrid catalyst is simple, and nanosheet cluster type nanoparticles with uniform size and high specific surface area are obtained.

Description

Technical field: [0001] The invention relates to the technical field of nanomaterials, in particular to a WS 2 / FeS nanosphere hybrid catalyst preparation method and its application. Background technique: [0002] The massive burning of traditional fossil fuels has made environmental pollution worse, making people look for other renewable energy sources. Hydrogen energy has a high energy density, and the only product produced after combustion is water, making it the most promising candidate energy carrier. Electrochemical water splitting offers a feasible route to generate hydrogen, involving two half-reactions, the hydrogen evolution reaction (HER) at the cathode and the oxygen evolution reaction (OER) at the anode. However, the actual efficiency of hydrogen release during electrochemical water splitting is limited by the kinetics of the hydrogen release reaction (HER, 2H + +2e - →H 2 ) are strictly limited. Therefore, high-performance HER catalysts are urgently neede...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/049B01J35/08C25B1/04C25B11/091H01M4/136H01M4/58H01M10/052
CPCB01J27/049B01J35/08B01J35/0033H01M4/5815H01M4/136H01M10/052C25B1/04Y02E60/10
Inventor 林健健孙蕾郑德华耿佳辉周倩男许慧忠
Owner QINGDAO UNIV OF SCI & TECH
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