Amorphous nickel-iron oxide nanometer sheet-shaped electrocatalysis material and preparation and application thereof

An electrocatalytic material and nano-sheet technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, electrode shapes/types, etc., can solve complex processes, various raw materials, and difficult Large-scale industrial application and other issues, to achieve the effect of simple preparation process, low cost of raw materials, and strong conductivity

Inactive Publication Date: 2019-05-24
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these preparation methods have a certain effect on improving the catalytic activity, they still have def

Method used

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  • Amorphous nickel-iron oxide nanometer sheet-shaped electrocatalysis material and preparation and application thereof
  • Amorphous nickel-iron oxide nanometer sheet-shaped electrocatalysis material and preparation and application thereof
  • Amorphous nickel-iron oxide nanometer sheet-shaped electrocatalysis material and preparation and application thereof

Examples

Experimental program
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Example Embodiment

[0025] Example 1:

[0026] Put a piece of 2×4cm 2 The nickel foam, thickness 1.6mm, is placed in a beaker containing 3M hydrochloric acid solution and ultrasonicated for 5 minutes, and then rinsed repeatedly with deionized water, and then the foam nickel is placed in a beaker containing ethanol and ultrasonicated for 5 minutes to remove the foam Oxides, oil stains and other impurities on the nickel surface. Dissolve 0.0916g nickel nitrate hexahydrate, 0.1616g ferric nitrate nonahydrate and 0.48g urea in 35mL deionized water to prepare a hydrothermal solution, stir with a magnetic stirrer for 10 minutes, make the solution evenly mixed, then transfer it to 50mL polytetrafluoroethylene In the fluoroethylene liner, the foamed nickel substrate is placed in the solution at an angle of 60°, and then the PTFE liner containing the foamed nickel substrate and the solution is placed in a stainless steel autoclave and sealed, and then placed in an electric blast drying box. Heated at 120℃ f...

Example Embodiment

[0027] Example 2:

[0028] Put a piece of 2×4cm 2 The nickel foam, thickness 1.6mm, is placed in a beaker containing 3M hydrochloric acid solution and ultrasonicated for 8 minutes, and then rinsed repeatedly with deionized water, and then the foamed nickel matrix is ​​placed in a beaker containing ethanol and ultrasonicated for 8 minutes to remove Oxide, oil and other impurities on the surface of foamed nickel. Dissolve 0.1862g nickel nitrate hexahydrate, 0.0646g ferric nitrate nonahydrate and 0.50g urea in 42mL deionized water to prepare a hydrothermal solution, stir with a magnetic stirrer for 8 minutes to mix the solution uniformly, and transfer it to 50mL polytetrafluoroethylene In the vinyl liner, place the foamed nickel substrate in the solution at an angle of 60°, and then place the PTFE liner filled with the foamed nickel substrate and the solution in a stainless steel autoclave and seal, in an electric blast drying box, Keep the temperature at 120℃ for 12h, and finally ...

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Abstract

The invention discloses an amorphous nickel-iron oxide nanometer sheet-shaped electrocatalysis material and preparation and application thereof, and belongs to the technical field of electrochemistryenergy converting materials. The amorphous nickel-iron oxide nanometer sheet-shaped thin film material is synthesized in situ on a commercial foamed nickle matrix through a hydrothermal method, and the amorphous nickel-iron oxide nanometer sheet-shaped electrocatalysis material has the advantages of a high specific surface area and many catalytic active sites. The material is applied to a 1M potassium hydroxide solution for electrolysis of water, when the current density is 10 mA.cm<-2>, the overpotential required for oxygen evolution is 206-220 mV, and the performance of the material is better than that of most currently-reported anodic oxygen evolution catalysis materials. Besides, the related preparing technology is simple, raw materials are rich and cheap, the material can replace a precious-metal-based catalyst which is expensive and scarce, and large-scale industrial application of electrolyzed water is promoted.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy conversion materials, and specifically relates to an amorphous nickel-iron oxide nanosheet electrocatalytic material for decomposing water in an alkaline medium, as well as its preparation process and application. Background technique [0002] With the continuous development of social economy and the continuous increase of the global population, coupled with the increasingly severe environmental problems, energy security has attracted people's attention. It is imminent to develop clean, efficient and pollution-free renewable energy. Due to its sustainable, non-polluting, and high energy density, hydrogen energy is considered to be an important energy source to replace fossil fuels and solve current energy security issues and severe environmental issues. Hydrogen production by electrolysis of water has the advantages of high purity, high efficiency, and strong operability, so it is ...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/10C25B1/04C25B11/06C25B11/03
CPCY02E60/36
Inventor 范爱玲曹小强杨诗綦谢登奎庞伟
Owner BEIJING UNIV OF TECH
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