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NiMo6-S-@HCS nanocomposite material and preparation method thereof, and application of NiMo6-S-@HCS nanocomposite material in electro-catalytic hydrogen production

A nano-composite material and nano-material technology are applied in the field of transition metal sulfide electrode materials and their preparation, which can solve the problem of high overpotential and achieve the effects of increasing kinetic rate, improving catalytic performance and excellent electrochemical activity.

Pending Publication Date: 2022-02-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned electrocatalytic hydrogen evolution materials still have a high overpotential

Method used

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  • NiMo6-S-@HCS nanocomposite material and preparation method thereof, and application of NiMo6-S-@HCS nanocomposite material in electro-catalytic hydrogen production
  • NiMo6-S-@HCS nanocomposite material and preparation method thereof, and application of NiMo6-S-@HCS nanocomposite material in electro-catalytic hydrogen production
  • NiMo6-S-@HCS nanocomposite material and preparation method thereof, and application of NiMo6-S-@HCS nanocomposite material in electro-catalytic hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1. Preparation of hollow carbon spheres

[0067] To a solution containing 70 mL of ethanol, 10 mL of deionized water and 3 mL of ammonia solution (25 wt%) was added 3.46 mL of ethyl orthosilicate with vigorous stirring at room temperature. After stirring for 15 minutes, 0.4 g of resorcinol and 0.56 mL of formaldehyde solution (37 wt %) were added to the solution, and the mixed solution was vigorously stirred at room temperature for 24 hours. The precipitate was isolated by centrifugation, washed with deionized water and ethanol, and then dried under vacuum at 60°C overnight. Precipitate in N 2 700°C (2°C min -1 ) for 5 hours to obtain SiO 2 @SiO 2 / C Nanospheres. Finally, the silica was removed by etching with sodium hydroxide (NaOH, 1.5M) for 48 hours to obtain hollow carbon spheres.

Embodiment 2

[0068] Embodiment 2, NiMo 6 - Preparation of S@HCS-10 nanocomposites

[0069] (1) 5.19g ammonium heptamolybdate tetrahydrate ((NH 4 ) 6 Mo 7 O 24 ·4H 2 O) was dissolved in 80 mL of deionized water, then heated to 100°C. 1.16g nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) was dissolved in 20 mL of deionized water and added to the above solution with stirring. The mixture was heated and stirred continuously to produce a dark green solution. The crude product was isolated by evaporation and filtration, recrystallized twice in hot water at 80 °C, and then dried under vacuum to obtain the green target product NiMo 6 .

[0070] (2) 0.2g NiMo 6 Dissolve in 32 mL of deionized water, then add 0.228 g of thiourea. After stirring for 20 minutes, 10 mg of hollow carbon spheres were added, followed by sonication for 1 hour, and the solution was transferred to a polytetrafluoroethylene autoclave (50 mL) for hydrothermal reaction at 200° C. for 48 hours. The product was wash...

Embodiment 3

[0071] Embodiment 3, NiMo 6 - Preparation of S@HCS-20 nanocomposites

[0072] (1) 5.19g ammonium heptamolybdate tetrahydrate ((NH 4 ) 6Mo 7 O 24 ·4H 2 O) was dissolved in 80 mL of deionized water, then heated to 100°C. 1.16g nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) was dissolved in 20 mL of deionized water and added to the above solution with stirring. The mixture was heated and stirred continuously to produce a dark green solution. The crude product was isolated by evaporation and filtration, recrystallized twice in hot water at 80 °C, and then dried under vacuum to obtain the green target product NiMo 6 .

[0073] (2) 0.2g NiMo 6 Dissolve in 32 mL of deionized water, then add 0.228 g of thiourea. After stirring for 20 minutes, 20 mg of hollow carbon spheres were added, followed by sonication for 1 hour, and the solution was transferred to a polytetrafluoroethylene autoclave (50 mL) for hydrothermal reaction at 200° C. for 48 hours. The product was washe...

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Abstract

The invention relates to a NiMo6-S-@HCS nanocomposite material and a preparation method thereof, and application of the NiMo6-S-@HCS nanocomposite material in electro-catalytic hydrogen production, in particular to a preparation method of a transition metal sulfide nanomaterial (hereinafter referred to as NiMo6-S-@HCS for short) which is used for electro-catalytic hydrogen production, grows on a hollow carbon sphere and takes heteropoly acid as a precursor, belonging to the technical field of nanomaterials. According to the NiMo6-S-@HCS nanocomposite material, the hollow carbon sphere is used as a substrate, and the nanomaterial formed by compounding of NiS and MoS2 directly grows on the carbon sphere; and the hollow carbon sphere is used as the substrate, and NiMo6 is vulcanized through a hydrothermal reaction and compounded with the hollow carbon sphere. The preparation method is simple and feasible in preparation process, low in cost and friendly to environment, can show excellent electrochemical activity under the condition of not utilizing noble metal, is suitable for the field of electrochemistry, and has relatively high potential practical value.

Description

technical field [0001] The invention relates to the field of electrocatalytic hydrogen production electrode materials, in particular to a transition metal sulfide electrode material grown on hollow carbon spheres for electrocatalytic hydrogen production and using heteropolyacid as a precursor and a preparation method thereof. Background technique [0002] With the ever-increasing energy crisis and environmental pollution, hydrogen is considered as a potential alternative energy due to its renewability, zero carbon emissions and high energy density. Electrochemical water splitting is an efficient and clean method for hydrogen production. The hydrogen evolution reaction (HER) as a key half-reaction of water splitting requires efficient electrocatalysts, which can be achieved by reducing the overpotential to achieve higher efficiency. Currently, the electrocatalysis research of hydrogen evolution reaction (HER) is still highly dependent on electrocatalysts based on platinum mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B11/054C25B11/065C25B1/04B82Y40/00B82Y30/00
CPCC25B11/091C25B11/054C25B11/065C25B1/04B82Y40/00B82Y30/00Y02E60/36
Inventor 周炎尤紫晗夏菡菡孙凤超王淑涛贾翠萍张军
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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