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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  • Summary
  • 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 defects such as complex process and various raw materials, which make it difficult to apply in large-scale industry.

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
Comparison scheme
Effect test

Embodiment 1

[0026] Put a piece of 2×4cm 2 Nickel foam, thickness 1.6mm, placed in a beaker filled with 3M hydrochloric acid solution for ultrasonication for 5 minutes, then rinsed repeatedly with deionized water, and then placed the foamed nickel in a beaker filled with ethanol for 5 minutes to remove foam Oxide, oil 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 form a hydrothermal solution, stir with a magnetic stirrer for 10min to mix the solution evenly, then transfer it to a 50mL polytetrafluoroethylene In the vinyl fluoride liner, the foamed nickel substrate is placed in the solution at an angle of 60°, and then the polytetrafluoroethylene liner with the foamed nickel substrate and the solution is placed in a stainless steel autoclave and sealed. Heated at 120°C for 12 hours, and finally cooled to room temperature to obtain nickel-iron salt and take it out, rinse i...

Embodiment 2

[0028] Put a piece of 2×4cm 2 Nickel foam with a thickness of 1.6mm was placed in a beaker filled with 3M hydrochloric acid solution for 8 minutes, then rinsed repeatedly with deionized water, and then the nickel foam substrate was placed in a beaker filled with ethanol for 8 minutes to remove Oxide, oil and other impurities on the surface of nickel foam. Dissolve 0.1862g nickel nitrate hexahydrate, 0.0646g ferric nitrate nonahydrate and 0.50g urea in 42mL deionized water to form a hydrothermal solution, stir with a magnetic stirrer for 8min to mix the solution evenly, and transfer it to 50mL polytetrafluoroethylene In the ethylene liner, place the nickel foam matrix in the solution at an angle of 60°, then place the polytetrafluoroethylene liner with the nickel foam matrix and the solution in a stainless steel autoclave and seal it, in an electric blast drying oven, Keep the temperature at 120°C for 12 hours, and finally cool to room temperature to obtain the nickel-iron sal...

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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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