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A kind of carbon fiber supported cobalt sulfide nanosheet catalyst and its application

A technology of cobalt sulfide and nanosheets, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of low activity of cracked water, achieve good reproducibility, and improve electrocatalytic cracking of aquatic products. Hydrogen performance, effect of improving stability

Inactive Publication Date: 2017-08-29
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a carbon fiber supported cobalt sulfide catalyst without a binder and its application in order to solve the technical problem of low electrocatalytic cracking water activity of existing catalysts under neutral conditions

Method used

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  • A kind of carbon fiber supported cobalt sulfide nanosheet catalyst and its application
  • A kind of carbon fiber supported cobalt sulfide nanosheet catalyst and its application
  • A kind of carbon fiber supported cobalt sulfide nanosheet catalyst and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Dissolve 1.25 g of cobalt acetate tetrahydrate and 0.38 g of thiourea in 28 mL of ethylene glycol, and put the resulting solution into a 50 mL reactor and add 1×5 cm 2 The carbon cloth is reacted at 200°C for 20 hours, and the product is washed and dried at 60°C for 2 hours to obtain a carbon fiber supported cobalt sulfide nanosheet catalyst.

[0030] The necessary structure and properties of the materials prepared by the above methods have been studied. figure 1 The XRD spectrum of the obtained carbon fiber loaded cobalt sulfide nanosheets shows that Co is formed on the carbon fiber 9 S 8 . figure 2 The SEM picture of the obtained carbon fiber loaded cobalt sulfide nanosheets, A and B can show that Co 9 S 8 The nanosheets are evenly loaded on the carbon fiber, and the Co can be clearly seen in the C picture 9 S 8 It is a very thin nanosheet structure. Figure 4 The TEM image of the obtained carbon fiber supported cobalt sulfide nanosheets shows that Co 9 S 8 The thickness o...

Embodiment 2

[0036] Same as Example 1, except that the amount of ethylene glycol is changed to 36mL, and the current density reaches 10mA / cm 2 , The required overpotential is 196mV.

Embodiment 3

[0038] Same as Example 1, except that the amount of ethylene glycol is changed to 24 mL, and the current density reaches 10 mA / cm 2 , The required overpotential is 200mV.

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Abstract

The invention provides a carbon fiber supported cobalt sulfide nanosheet catalyst and application thereof and belongs to the technical field of synthesis and application of catalysts. Firstly, metallic cobalt salt and a sulfur source are dissolved in ethylene glycol, then the solution is fed into a reaction kettle with a polytetrafluoroethylene liner, and a carbon-based conductive material is added and then is processed at a certain temperature to obtain the carbon fiber supported cobalt sulfide nanosheet catalyst. The carbon fiber supported cobalt sulfide nanosheet catalyst is prepared by adopting a solvothermal method through one step, and the synthesis method is moderate and simple, has no high device requirement and is suitable for scale production. In addition, synthesis raw materials are cheap, the controllability is high, and the reproducibility of sample properties is good. What's emphasized is that more catalytic active sites can be exposed and electric catalytic cracking hydrogen production performance of the cobalt sulfide can be greatly improved through combination of cobalt sulfide nanosheets generated in situ and the flexible three-dimensional structure of carbon fiber.

Description

Technical field [0001] The invention belongs to the technical field of catalyst synthesis and application, and specifically relates to a carbon fiber supported cobalt sulfide nanosheet catalyst and its application in electrocatalytic cracking of water to produce hydrogen. Background technique [0002] With the gradual depletion of fossil fuels (coal, oil, natural gas, etc.), hydrogen energy is regarded as one of the ideal alternative green energy sources. There are three main methods for industrial hydrogen production: steam methane conversion, coal gasification, and water electrolysis. Because the first two hydrogen production schemes not only aggravate the consumption of fossil energy, but also increase the emission of greenhouse gas carbon dioxide, electrocatalytic cracking of water Hydrogen is one of the most promising hydrogen production technologies for the following reasons: (1) Water reserves are abundant; (2) By-product (oxygen) "zero" pollution; (3) Electricity is conve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J35/06C25B1/04
CPCY02E60/36
Inventor 李国栋邹晓新冯亮亮吴园园
Owner JILIN UNIV
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