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Preparation method of Co2P/CuP2/NF hydrogen and oxygen evolution electrocatalyst

An electrocatalyst and oxygen evolution technology, applied in electrodes, electrolysis components, electrolysis process, etc., to achieve excellent electrocatalytic hydrogen evolution and oxygen evolution performance, simple preparation method and long service life

Active Publication Date: 2021-11-12
江西新节氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few practical applications of zinc-water batteries. Therefore, it is necessary to explore and develop a high-performance, low-cost electrocatalyst to replace traditional noble metal-based catalysts, and to apply the prepared catalysts to zinc-water batteries.

Method used

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  • Preparation method of Co2P/CuP2/NF hydrogen and oxygen evolution electrocatalyst
  • Preparation method of Co2P/CuP2/NF hydrogen and oxygen evolution electrocatalyst
  • Preparation method of Co2P/CuP2/NF hydrogen and oxygen evolution electrocatalyst

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Experimental program
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Effect test

Embodiment 1

[0026] Two, embodiment 1: prepare CuO / NF material

[0027] Step (1) Process nickel foam: cut nickel foam into 3×1.5 cm 2 size. Then ultrasonically wash in 0.5 mol / L sulfuric acid solution, deionized water and ethanol for 10 minutes respectively, cycle wash three times, and dry naturally for later use.

[0028] Step (2) Prepare copper chloride dihydrate solution: weigh 0.6 mmol (0.2, 0.4, 0.8, 1.0 mmol) copper chloride dihydrate and dissolve it in 15 mL deionized water, sonicate for 10 minutes to obtain a copper chloride solution, then add 750 uL ammonia solution was sonicated for 10 minutes.

[0029] Step (3) Low-temperature hydrothermal reaction: put the nickel foam washed in step (1) into a small glass bottle containing 20 mL of the solution prepared in step (2), and keep it warm in an oven at 80°C 2 hours. After natural cooling, rinse the nickel foam with plenty of water, and then dry it at room temperature for later use.

Embodiment 2

[0030] Three, embodiment 2: prepare CuP 2 / NF material

[0031] Step (1) process nickel foam: cut the nickel foam into 3×1.5 cm 2 size. Then ultrasonically wash in 0.5 mol / L sulfuric acid solution, deionized water and ethanol for 10 minutes respectively, cycle wash three times, and dry naturally for later use.

[0032] Step (2) Prepare copper chloride dihydrate solution: Weigh 0.8 mmol copper chloride dihydrate and dissolve it in 15 mL deionized water, sonicate for 10 minutes to obtain a copper chloride solution, then add 750 uL ammonia water for 10 minutes to sonicate to adjust the solution pH value.

[0033] Step (3) Low-temperature hydrothermal reaction: put the nickel foam washed in step (1) into a small glass bottle containing 20 mL of the solution prepared in step (2), and keep it warm in an oven at 80°C 2 hours. After natural cooling, rinse the nickel foam with plenty of water, and then dry it at room temperature for later use.

[0034] Step (4) Low-temperature ph...

Embodiment 3

[0035] Four, embodiment 3: preparation Co 2 P / NF material

[0036] Step (1) process nickel foam: cut the nickel foam into 1×1.5 cm 2 size. Then ultrasonically wash in 0.5 mol / L sulfuric acid solution, deionized water and ethanol for 10 minutes respectively, cycle wash three times, and dry naturally for later use.

[0037] Step (2) Prepare the cobalt nitrate solution: weigh 0.29 g of cobalt nitrate hexahydrate and dissolve it in 25 mL of deionized water, and sonicate for 10 minutes to obtain the cobalt nitrate solution.

[0038] Step (3) Constant potential electrodeposition: In the three-electrode system, nickel foam is used as the working electrode, the platinum sheet is used as the counter electrode, the saturated calomel electrode is used as the reference electrode, and the electrolyte is the cobalt nitrate solution prepared in step (2) , electrodeposited at a constant potential of -1.1 V for 5 min. After natural cooling, the nickel foam was rinsed with deionized water, ...

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Abstract

The invention relates to the technical field of electro-catalysis water decomposition, in particular to a preparation method of a Co2P / CuP2 / NF hydrogen and oxygen evolution electro-catalyst, a Co2P / CuP2 / NF composite material is obtained through a low-temperature hydrothermal method, a constant-potential electro-deposition method and a low-temperature phosphating treatment method, and the hydrothermal method is characterized in that CuO is grown on foamed nickel to obtain a Cu-based precursor; co species are electrodeposited on the surface of CuO at constant potential, a Cu-Co composite material precursor is obtained, and low-temperature phosphating treatment is carried out in the nitrogen atmosphere. The preparation method is simple, the Co2P / CuP2 / NF composite material is obtained by performing low-temperature hydrothermal and constant-potential electro-deposition and low-temperature phosphating treatment by taking the foamed nickel as a substrate, and the Co2P / CuP2 / NF composite material has excellent electro-catalytic hydrogen evolution and oxygen evolution performance under an alkaline condition, can also be applied to a zinc-water battery and is relatively long in service life.

Description

technical field [0001] The invention belongs to the field of electrocatalytic total water splitting, specifically a Co 2 P / CuP 2 / NF hydrogen evolution oxygen evolution electrocatalyst preparation method. Background technique [0002] When fossil fuels are exhausted, people must look for new energy to replace carbon-based energy. As a clean, efficient and sustainable energy carrier, hydrogen is a promising energy alternative to traditional fossil fuels. Water splitting is a better way to generate hydrogen due to water sustainability and environmental friendliness. Compared with water splitting, which can be achieved by using electricity or light, electrocatalytic water splitting is a more practical method with higher conversion efficiency and higher yield of hydrogen. However, water splitting actually requires a large voltage, above the theoretical minimum cell potential of 1.23 V, which is clearly hampered by the slow kinetics of water electrolysis involving hydrogen ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/091C25B11/061C25B1/04
CPCC25B11/054C25B11/061C25B11/091C25B1/04Y02E60/36
Inventor 杨秀林王丽霞
Owner 江西新节氢能源科技有限公司
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