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Ni3S2atCoO-NF composite material as well as synthesis method and application thereof

A composite material and synthesis method technology, applied in the field of Ni3S2@CoO-NF composite material and its synthesis, can solve the problems of easy falling off, insufficient electrochemical performance of CoO, limited catalytic activity of powder catalyst, etc., and achieve high hydrogen conversion rate, high rate Fast, low-cost synthetic effects

Pending Publication Date: 2022-01-21
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a Ni 3 S 2 @CoO-NF composite materials and their synthesis methods and applications to solve the insufficient electrochemical performance of CoO, Ni 3 S 2 Defects such as limited catalytic activity and / or easy shedding of @CoO powder catalysts

Method used

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  • Ni3S2atCoO-NF composite material as well as synthesis method and application thereof
  • Ni3S2atCoO-NF composite material as well as synthesis method and application thereof
  • Ni3S2atCoO-NF composite material as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of Ni 3 S 2 @CoO / NF Composites

[0038] Raw material: 0.8 mmol of cobalt nitrate hexahydrate

[0039] Urea 4.0mmol

[0040] Ammonium fluoride 0.8mmol

[0041] Nickel nitrate hexahydrate 1.0mmol

[0042] Thiourea 1.0mmol

[0043] A kind of Ni 3 S 2 @CoO / NF composite material is prepared by the preparation method of the following steps:

[0044] (a) 0.8mmol cobalt nitrate hexahydrate, 4.0mmol urea, 0.8mmol ammonium fluoride and 20ml deionized water are ultrasonically mixed to obtain a cobalt salt solution. When mixing, ultrasonically disperse for 2min with a power of 1000W, and the treated foam nickel (with The nickel foam matrix is ​​cut into 1cm*4cm samples, ultrasonicated with acetone, absolute ethanol, and deionized water for 25 minutes in sequence, and finally rinsed with deionized water, and then dried) soaked in the above cobalt salt solution; then soaked with foamed nickel The cobalt salt solution was moved to a hydrothermal autoclave and heat...

Embodiment 2

[0061] Preparation of Ni 3 S 2 @CoO / NF Composites

[0062] Raw material: 0.8 mmol of cobalt nitrate hexahydrate

[0063] Urea 4.0mmol

[0064] Ammonium fluoride 0.8mmol

[0065] Nickel nitrate hexahydrate 1.0mmol

[0066] Thiourea 1.0mmol

[0067] A kind of Ni 3 S 2 @CoO / NF composite material is prepared by the preparation method of the following steps:

[0068] (a) 0.8mmol cobalt nitrate hexahydrate, 4.0mmol urea, 0.8mmol ammonium fluoride and 20ml deionized water are ultrasonically mixed to obtain a cobalt salt solution. When mixing, ultrasonically disperse for 2min with a power of 1000W, and the treated foam nickel (with The nickel foam matrix is ​​cut into 1cm*4cm samples, ultrasonicated with acetone, absolute ethanol, and deionized water for 25 minutes in sequence, and finally rinsed with deionized water, and then dried) soaked in the above cobalt salt solution; then soaked with foamed nickel The cobalt salt solution was moved to a hydrothermal autoclave and heat...

Embodiment 3

[0071] Preparation of Ni 3 S 2 @CoO / NF Composites

[0072] Raw material: 0.8 mmol of cobalt nitrate hexahydrate

[0073] Urea 4.0mmol

[0074] Ammonium fluoride 0.8mmol

[0075] Nickel nitrate hexahydrate 1.0mmol

[0076] Thiourea 1.0mmol

[0077] A kind of Ni 3 S 2 @CoO / NF composite material is prepared by the preparation method of the following steps:

[0078] (a) 0.8mmol cobalt nitrate hexahydrate, 4.0mmol urea, 0.8mmol ammonium fluoride and 20ml deionized water are ultrasonically mixed to obtain a cobalt salt solution. When mixing, ultrasonically disperse for 2min with a power of 1000W, and the treated foam nickel (with The nickel foam matrix is ​​cut into 1cm*4cm samples, ultrasonicated with acetone, absolute ethanol, and deionized water for 25 minutes in sequence, and finally rinsed with deionized water, and then dried) soaked in the above cobalt salt solution; then soaked with foamed nickel The cobalt salt solution was moved to a hydrothermal autoclave and heat...

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Abstract

The invention relates to a Ni3S2atCoO-NF composite material and a synthesis method and application thereof, the method comprises the following steps: (a) dispersing cobalt salt, urea and ammonium salt in water to obtain a solution A, soaking treated foamed nickel in the solution A, and carrying out hydrothermal treatment, drying and calcination to obtain a CoO-NF composite material; and (b) dispersing nickel nitrate hexahydrate and a sulfur source in water to obtain a solution B, putting the CoO-NF composite material obtained in the step (a) into the solution B, carrying out a hydrothermal reaction, and drying to obtain a target product. The composite material can be used for a working electrode of an electro-catalytic hydrogen evolution reaction, the contact area of the material and water is increased through loading of Ni3S2, Ni3S2 and CoO form a heterostructure, the heterostructure shows excellent adsorption capacity on a hydrogen intermediate in an alkaline solution, and the hydrogen evolution performance and stability of the material are improved. In addition, the hydrogen evolution material provided by the invention has lower Tafel slope and overpotential, the energy barrier required to be broken through for hydrogen evolution is lower, the hydrogen conversion rate is higher, and the rate is higher.

Description

technical field [0001] The invention belongs to the technical field of hydrogen energy, in particular to a Ni 3 S 2 @CoO-NF composites and their synthesis methods and applications. Background technique [0002] The global energy crisis and its related environmental problems have created an urgent need for clean, economical and sustainable energy. Hydrogen (H 2 ), with the highest gravimetric energy density and zero carbon content, is widely regarded as a promising clean energy carrier to sustainably meet our future needs. Electrocatalytic water splitting for large-scale hydrogen production from abundant water sources is considered to be a facile route to this end. Currently, Pt group metals have been proven to be the most efficient electrocatalysts for the hydrogen evolution reaction (HER). However, low earth reserves and high cost greatly limit the widespread application of such metals. Therefore, it is highly desirable to develop alternative catalysts with low cost, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/031C25B11/052C25B11/061C25B11/091C25B1/04C01G53/11C01G51/04
CPCC25B11/031C25B11/052C25B11/061C25B11/091C25B1/04C01G53/11C01G51/04C01P2004/80Y02E60/36
Inventor 蒋继波孙冉黄星许文秀李明晶王云云李雨露唐佳斌魏影陈晓敏李婷婷周少博宣宇娜丛海山韩生
Owner SHANGHAI INST OF TECH
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