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Carbon fiber supported cobalt sulfide nanosheet catalyst and application thereof

A cobalt sulfide and nanosheet technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low activity of cracked water, and achieve good reproducibility, high controllability, Mild and simple effect of synthetic method

Inactive Publication Date: 2016-02-03
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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  • Carbon fiber supported cobalt sulfide nanosheet catalyst and application thereof
  • Carbon fiber supported cobalt sulfide nanosheet catalyst and application thereof
  • Carbon fiber supported cobalt sulfide nanosheet catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve 1.25g of cobalt acetate tetrahydrate and 0.38g of thiourea in 28mL of ethylene glycol, put the resulting solution into a 50mL reactor, and add 1×5cm 2 The carbon cloth was reacted at 200°C for 20 hours, and the product was 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 method were studied. figure 1 The XRD spectrum of the obtained carbon fiber-loaded cobalt sulfide nanosheets shows that Co 9 S 8 . figure 2 It is the SEM photo of the obtained carbon fiber supported cobalt sulfide nanosheets, A and B can be seen that Co 9 S 8 The nanosheets are evenly loaded on the carbon fiber, and the Co 9 S 8 It is an extremely thin nanosheet structure. Figure 4 It is the TEM photo of the obtained carbon fiber supported cobalt sulfide nanosheets, it can be seen that the Co 9 S 8 The thickness of the nano sheet is 4-7nm. ...

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 , requires an overpotential of 196mV.

Embodiment 3

[0038] Same as Example 1, except that the amount of ethylene glycol is changed to 24mL, and the current density reaches 10mA / cm 2 , requires an overpotential of 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 in particular relates to a carbon fiber-supported cobalt sulfide nanosheet catalyst and its application in electrocatalytic cracking of water for hydrogen production. 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. Since the first two hydrogen production schemes not only intensify the consumption of fossil energy but also increase the emission of greenhouse gas carbon dioxide, electrocatalytic cracking of water to produce Hydrogen is one of the most promising hydrogen production technologies for the following reasons: (1) abundant water reserves; (2) "zero" pollution of by-products (oxygen); (3) con...

Claims

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Application Information

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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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