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Preparation method of amorphous MoS2-modified CoS/Co0.85Se heterogeneous nanotube array electrocatalyst

A technology of nanotube arrays and electrocatalysts, applied in physical/chemical process catalysts, chemical instruments and methods, nanotechnology, etc., can solve the problems of long preparation time, cumbersome operation, high energy consumption, etc., and achieve easy control and good repeatability , low cost effect

Active Publication Date: 2019-11-15
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these methods require high-energy-consuming experimental conditions or multi-step reactions to realize the construction of hollow nanocomposites, which are costly, cumbersome to operate, and relatively long in preparation time.
A facile one-step solvothermal preparation of arrays of multi-component transition metal hollow nanocomposite structures with excellent water electrolysis performance has not been reported yet

Method used

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  • Preparation method of amorphous MoS2-modified CoS/Co0.85Se heterogeneous nanotube array electrocatalyst
  • Preparation method of amorphous MoS2-modified CoS/Co0.85Se heterogeneous nanotube array electrocatalyst
  • Preparation method of amorphous MoS2-modified CoS/Co0.85Se heterogeneous nanotube array electrocatalyst

Examples

Experimental program
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Embodiment 1

[0024] First cut out a nickel foam of 2cm×4cm, put it in 3M hydrochloric acid (HCl) and ultrasonically clean it for 15 minutes, wash it with water and ethanol in turn, and dry it under vacuum at 60°C for 3 hours for later use. Then using water as solvent, add 0.69g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 0.18g ammonium fluoride (NH 4 F) and 0.72g urea (CO(NH) 2 ), formed a 35ml homogeneous solution by ultrasonic dispersion. The above solution was transferred to a reactor, and a piece of pretreated nickel foam (2cm×4cm) was added into the reactor, and reacted at 120°C for 9 hours. After the reaction, cool to room temperature, wash with distilled water and absolute ethanol, and dry in vacuum at 60°C to obtain Co(CO 3 ) 0.5 (OH) nanorod arrays.

[0025] Take 1g of selenium powder (Se) and dissolve it in 35ml of ethanol and N,N-dimethylformamide (DMF) mixed solution (v:v=2:5), after ultrasonication for 10 minutes, transfer it to the reaction kettle, and then Add the above-pr...

Embodiment 2

[0028] First cut out a nickel foam of 2cm×4cm, put it in 3M hydrochloric acid (HCl) and ultrasonically clean it for 15 minutes, wash it with water and ethanol in turn, and dry it under vacuum at 60°C for 3 hours for later use. Then using water as solvent, add 0.69g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 0.18g ammonium fluoride (NH 4 F) and 0.72g urea (CO(NH) 2 ), through ultrasonic dispersion, prepared into a 35ml solution. The above solution was transferred to a reactor, and a piece of pretreated nickel foam (2cm×4cm) was added into the reactor, and reacted at 120°C for 9 hours. After the reaction, cool to room temperature, wash with distilled water and absolute ethanol, and dry in vacuum at 60°C to obtain Co(CO 3 ) 0.5 (OH) nanorod arrays.

[0029] Take 0.91g ((NH 4 ) 2 MoS 4 ) was dissolved in 35ml of ethanol and N,N-dimethylformamide (DMF) mixed solution (v:v=2:5), after ultrasonication for 10 minutes, it was transferred to the reaction kettle, and then the above-...

Embodiment 3

[0032] First cut out a nickel foam of 2cm×4cm, put it in 3M hydrochloric acid (HCl) and ultrasonically clean it for 15 minutes, wash it with water and ethanol in turn, and dry it under vacuum at 60°C for 3 hours for later use. Then using water as solvent, add 0.69g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O), 0.18g ammonium fluoride (NH 4 F) and 0.72g urea (CO(NH) 2 ), was dispersed by ultrasound to prepare a 35ml homogeneous solution. The above solution was transferred to a reactor, and a piece of pretreated nickel foam (2cm×4cm) was added into the reactor, and reacted at 120°C for 9 hours. After the reaction, cool to room temperature, wash with distilled water and absolute ethanol, and dry in vacuum at 60°C to obtain Co(CO 3 ) 0.5 (OH) nanorod arrays.

[0033] Get 1g selenium powder (Se) and 0.91g ((NH 4 ) 2 MoS 4 ) was dissolved in 35ml of ethanol and N,N-dimethylformamide (DMF) mixed solution (v:v=2:5), after ultrasonication for 10 minutes, it was transferred to the rea...

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Abstract

The invention relates to a preparation method of an amorphous MoS2-modified CoS / Co0.85Se heterogeneous nanotube array electrocatalyst. The preparation method is characterized in that selenium powder (Se) used as a selenium source, ammonium tetrathiomolybdate ((NH4)2MoS4) used a molybdenum source and a sulfur source and a Co(CO3)0.5(OH) nanorod used as a self-sacrificial template undergo a solvothermal reaction to obtain the amorphous MoS2-modified CoS / Co0.85Se heterogeneous nanotube array. The diameter of the nanotubes of the amorphous MoS2-modified CoS / Co0.85Se heterogeneous nanotube array prepared in the invention is 30-60 nm. The amorphous MoS2-modified CoS / Co0.85Se heterogeneous nanotube array prepared in the invention exhibits an excellent electrocatalytic overall water-splitting performance, and the method of the invention has the characteristics of low cost, easiness in control, high uniformity and good repeatability.

Description

Technical field: [0001] The present invention belongs to amorphous MoS 2 Modified CoS / Co 0.85 Se heterogeneous nanotube array preparation and electrolytic water performance application technology field, especially provides an amorphous MoS 2 Modified CoS / Co 0.85 Preparation method of Se heterogeneous nanotube array electrocatalyst. Background technique: [0002] With the increasingly serious problems of energy shortage and environmental pollution, it is imminent to find clean new energy to replace traditional fossil fuels. Hydrogen energy is considered as an ideal sustainable clean energy because of its clean and renewable characteristics. Water electrolysis is currently the most promising method for industrial hydrogen production. However, whether it is the hydrogen production reaction at the cathode or the oxygen production reaction at the anode, the overpotential in the electrolysis process greatly limits the efficiency of the electrolysis, and high-efficiency and st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J35/02B82Y30/00B82Y40/00C25B1/04C25B11/06B01J35/00
CPCB01J27/0573B82Y30/00B82Y40/00C25B1/04C25B11/04B01J35/40B01J35/33Y02E60/36
Inventor 胡勇孙钰琳沈峻岭
Owner ZHEJIANG NORMAL UNIVERSITY
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