Co(at) NiSx-CNT electrode material as well as preparation method and application thereof

An electrode material and electrocatalytic technology, applied in the field of hydrogen energy, can solve the problems of not achieving good results, achieve excellent electrochemical performance, increase the specific surface area, and the synthesis method is simple and safe

Active Publication Date: 2020-07-17
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some studies have shown that the HER activity of metal sulfides can be improved by doping other transition metals, but no good results have been achieved so far.

Method used

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  • Co(at) NiSx-CNT electrode material as well as preparation method and application thereof
  • Co(at) NiSx-CNT electrode material as well as preparation method and application thereof
  • Co(at) NiSx-CNT electrode material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Cobalt acetate 0.75mmol

[0039] Nickel acetate 1.0mmol

[0040] Thioacetamide 7mmol

[0041] Carbon nanotubes 10mg

[0042] N,N-Dimethylformamide 25mL

[0043] The electrode material is prepared by the preparation method of the following steps:

[0044] Mix 0.75mmol of cobalt acetate, 1.0mmol of nickel acetate, 7mmol of thioacetamide and 25mL of N,N-dimethylformamide, ultrasonically disperse for 20min; add 10mg of carbon nanotubes to the solution and ultrasonically disperse for 5min; Move it to a hydrothermal autoclave and heat it at 160°C for 20 hours, centrifuge the solution obtained by hydroheating to collect the precipitate, and dry the precipitate in a vacuum oven at 60°C for 16 hours to obtain the Co@NiSx-CNT electrode material. The specific surface area of ​​the material is 95.6m 2 / g. figure 1 , the translucent tubes are carbon nanotubes, and it can be seen that carbon nanotubes and cobalt-nickel sulfide are densely combined. figure 2 , it can be seen t...

Embodiment 2

[0051] Cobalt acetate 0.5mmol

[0052] Nickel acetate 2.0mmol

[0053] Thioacetamide 10mmol

[0054] Carbon nanotubes 20mg

[0055] N,N-Dimethylformamide 50mL

[0056] The electrode material is prepared by the preparation method of the following steps:

[0057] Mix 0.5mmol of cobalt acetate, 2.0mmol of nickel acetate, 10mmol of thioacetamide and 50mL of N,N-dimethylformamide, and ultrasonically disperse for 20min; add 20mg of carbon nanotubes to the solution and ultrasonically disperse for 8min; Move to a hydrothermal autoclave and heat at 180°C for 12 hours, centrifuge the solution obtained by hydroheating to collect the precipitate, and dry the precipitate in a vacuum oven at 60°C for 16 hours to obtain the Co@NiSx-CNT electrode material. The specific surface area of ​​the material is 78.2m 2 / g.

Embodiment 3

[0064] Cobalt acetate 0.2mmol

[0065] Nickel acetate 2.0mmol

[0066] Thioacetamide 15mmol

[0067] Carbon nanotubes 12mg

[0068] N,N-Dimethylformamide 40mL

[0069] The electrode material is prepared by the preparation method of the following steps:

[0070] Mix 0.2mmol cobalt acetate, 2.0mmol nickel acetate, 15mmol thioacetamide and 40mL N,N-dimethylformamide, and ultrasonically disperse for 30min; add 12mg of carbon nanotubes to the solution and ultrasonically disperse for 10min; Move to a hydrothermal autoclave and heat at 200°C for 18 hours, centrifuge the solution obtained from the hydroheating to collect the precipitate, and dry the precipitate in a vacuum oven at 90°C for 24 hours to obtain the Co@NiSx-CNT electrode material. The specific surface area of ​​the material is 81.7m 2 / g.

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Abstract

The invention relates to a Co (at) NiSx-CNT electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing a cobalt source, a nickelsource, a sulfur source and N, N-dimethylformamide evenly to obtain a mixed solution, then adding same into carbon nanotubes, and obtaining a reaction solution after even mixing; subjecting the reaction liquid to a high-temperature hydrothermal reaction, and obtaining the Co(at) NiSx-CNT electrode material through aftertreatment, and wherein the electrode material is applied to an electro-catalytic hydrogen evolution reaction. Compared with the prior art, the Co(at) NiSx-CNT electrode material has the advantages that the synthesis process is simple, convenient and safe, the specific surfacearea of the material is increased by loading the material on the carbon nanotubes, the problem of insufficient active sites exposed on the surface of sulfide is solved, and the electrochemical performance of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen energy, and relates to a Co@NiSx-CNT electrode material and a preparation method and application thereof. Background technique [0002] Hydrogen can be used as an economical fuel in electrochemical cells that power vehicles or electrical equipment. The production of hydrogen fuels has led to extensive research on efficient electrocatalysts for the hydrogen evolution reaction (HER). The researchers found that it is possible to use earth-cheap binary metal sulfides, nitrides, borides, and phosphides instead of noble metal Pt as HER electrocatalysts. For hydrogenase systems in nature, a metal-sulfur cluster with five permanent ligands in a twisted octahedral linker shell has been shown to be the active site of HER. Many efforts have been made by researchers to synthesize inorganic metal-sulfur complexes and solids to generate analogous mimics of active sites. For example, it has been shown that d...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J35/10C25B1/04C25B11/06
CPCB01J27/043C25B1/04C25B11/091B01J35/33B01J35/61Y02E60/36
Inventor 蒋继波陈宇凯丛海山唐佳斌胡晓敏王露露杨圆圆马健韩生
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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