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Cobalt/cobaltous oxide porous nanosheet array composite material, and preparation method and application thereof

A technology of nanosheet array and composite material, which is applied in the field of cobalt/cobaltous oxide porous nanosheet array composite material and its preparation, which can solve the problems of hindering wide application, limited photochemical enhancement ability, high price of precious metals, etc., and achieve performance improvement , Oxygen production and total water splitting performance, low cost effect

Inactive Publication Date: 2019-09-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high price of noble metals greatly hinders the widespread application of this strategy, and the photochemical enhancement capability is limited to monofunctional electrocatalysts.

Method used

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  • Cobalt/cobaltous oxide porous nanosheet array composite material, and preparation method and application thereof
  • Cobalt/cobaltous oxide porous nanosheet array composite material, and preparation method and application thereof
  • Cobalt/cobaltous oxide porous nanosheet array composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1, cut the nickel foam to 2×3cm 2 Then soak nickel foam in acetone solution, 5mol / L dilute hydrochloric acid solution and deionized water and ultrasonic for 15 minutes.

[0043] Step 2, weigh 1.16g of cobalt nitrate hexahydrate, 0.6g of ammonium fluoride, and 1.2g of urea in a 100mL beaker, and add 72mL of deionized water into it, and stir magnetically for 30 minutes at room temperature. Get 15mL of the mixed solution and place it in the polytetrafluoroethylene lining of the stainless steel reaction kettle, then take a piece of the treated foamed nickel in step 1 and put it into the polytetrafluoroethylene lining of the stainless steel reaction kettle, and then heat the water The kettle was sealed and reacted at 100°C for 4 hours. After cooling to room temperature, the nickel foam loaded with the product was taken out from the polytetrafluoroethylene lining of the stainless steel reactor, washed three times with water and ethanol respectively, and then dried in a ...

Embodiment 2

[0047] Step 1, cut the nickel foam to 2×3cm 2 Then soak nickel foam in acetone solution, 5mol / L dilute hydrochloric acid solution and deionized water and ultrasonic for 15 minutes.

[0048] Step 2, weigh 1.16g of cobalt nitrate hexahydrate, 0.6g of ammonium fluoride, and 1.2g of urea in a 100mL beaker, and add 72mL of deionized water into it, and stir magnetically for 30 minutes at room temperature. Get 15mL of the mixed solution and place it in the polytetrafluoroethylene lining of the stainless steel reaction kettle, then take a piece of the treated foamed nickel in step 1 and put it into the polytetrafluoroethylene lining of the stainless steel reaction kettle, and then heat the water The kettle was sealed and reacted at 100°C for 5 hours. After cooling to room temperature, the nickel foam loaded with the product was taken out from the polytetrafluoroethylene lining of the stainless steel reactor, washed three times with water and ethanol respectively, and then dried in a ...

Embodiment 3

[0052] Step 1, cut the nickel foam to 2×3cm 2 Then soak nickel foam in acetone solution, 5mol / L dilute hydrochloric acid solution and deionized water and ultrasonic for 15 minutes.

[0053] Step 2, weigh 1.16g of cobalt nitrate hexahydrate, 0.6g of ammonium fluoride, and 1.2g of urea in a 100mL beaker, and add 72mL of deionized water into it, and stir magnetically for 30 minutes at room temperature. Get 15mL of the mixed solution and place it in the polytetrafluoroethylene lining of the stainless steel reaction kettle, then take a piece of the treated foamed nickel in step 1 and put it into the polytetrafluoroethylene lining of the stainless steel reaction kettle, and then heat the water The kettle was sealed and reacted at 100°C for 4 hours. After cooling to room temperature, the nickel foam loaded with the product was taken out from the polytetrafluoroethylene lining of the stainless steel reactor, washed three times with water and ethanol respectively, and then dried in a ...

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Abstract

The invention discloses a cobalt / cobaltous oxide porous nanosheet array composite material, and a preparation method and an application thereof. Cobalt nitrate hexahydrate, ammonium fluoride, urea and water which are used as raw materials are hydrothermally reacted with foamed nickel as a carrier, and the obtained reaction product is heated and calcined, and then is reduced with hydrogen to obtain the carbon / cobaltous oxide porous nanosheet array composite material. The composite material of the invention has the advantages of low cost, large specific surface area, and good hydrogen-producing, oxygen-producing and water-splitting performances.

Description

technical field [0001] The invention relates to the technical field of transition metal oxide nanomaterials, in particular to a cobalt / cobaltous oxide porous nanosheet array composite material and its preparation method and application. Background technique [0002] Energy and environmental issues are major challenges facing mankind in the 21st century. Hydrogen energy is a clean, pollution-free and carbon-free energy, which has great research value and broad application prospects for alleviating the energy shortage and environmental pollution problems faced by today's society. Hydrogen production by electrolysis of water is a widely used and relatively mature method at present. The reaction of electrolysis of water is composed of two parts: hydrogen production and oxygen production. Bifunctional catalysts that can simultaneously enhance the catalytic activity of hydrogen and oxygen production have become particularly important. At present, the traditional catalysts for el...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04C23C18/12B01J23/75B82Y30/00B82Y40/00
CPCB01J23/75B82Y30/00B82Y40/00C23C18/1204C23C18/1241C23C18/1295C25B1/04C25B11/04C25B1/55Y02E60/36
Inventor 于一夫孙昭君张兵韩希玲
Owner TIANJIN UNIV
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