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Preparation method of bimetal-doped Ni3S2 oxygen evolution electrocatalyst

An electrocatalyst and bimetallic technology, which is applied in the direction of electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of poor conductivity of catalytic active sites, achieve the effect of improving electrocatalytic activity, simple preparation method, and easy operation

Pending Publication Date: 2022-05-06
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure Ni 3 S 2 Affected by limited catalytic activity, limited active sites, and poor electrical conductivity, efforts have been made to design different types of Ni in order to enhance the catalytic performance for practical applications. 3 S 2 based nanostructures or nanocomposites

Method used

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  • Preparation method of bimetal-doped Ni3S2 oxygen evolution electrocatalyst
  • Preparation method of bimetal-doped Ni3S2 oxygen evolution electrocatalyst
  • Preparation method of bimetal-doped Ni3S2 oxygen evolution electrocatalyst

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Embodiment 1

[0028] (1) The bimetallic doped Ni 3 S 2 Preparation method of oxygen evolution electrocatalyst: cut the foam nickel to a size of 1*1.5cm, ultrasonically clean the cut foam nickel in 1mhcl, deionized water and absolute ethanol for 20min at a time to remove oxides and impurities on the surface of foam nickel, and then dry it in vacuum at 60 ℃ for subsequent use. First, 1.5mmol CO (no 3 ) 2 ·6H 2 O、0.15mmol NH 4 VO 3 、6mmol CO(NH 2 ) 2 、2.5mmol NH 4 F is dissolved in 40ml deionized water, stirred until transparent, the solution is transferred to the PTFE lining, and then the treated foam nickel is immersed in the solution, and the lining is transferred to the stainless steel reactor for sealing. Heat water at 120 ℃ for 6h, cool it naturally to room temperature, take out the reactor, wash the product with deionized water for 3-4 times, and then dry it in a vacuum drying oven at 60 ℃ for 12h. CoV / NF was obtained.

[0029] (2) Dissolve 3mmol thiourea in 30ml deionized water, stir unt...

Embodiment 2

[0035] (1) The bimetallic doped Ni 3 S 2 The preparation method of the electrocatalyst for oxygen evolution: cut the foam nickel to a size of 1*1.5cm, ultrasonically clean the cut foam nickel in 1mhcl, deionized water and absolute ethanol for 20min at a time to remove the oxides and impurities on the surface of foam nickel, and then dry it in vacuum at 60 ℃ for subsequent use. First, 1.4mmol CO (no 3 ) 2 ·6H 2 O、0.28mmol NH 4 VO 3 、6mmol CO(NH 2 ) 2 、2.5mmol NH 4 F is dissolved in 40ml deionized water, stirred until transparent, the solution is transferred to the PTFE lining, and then the treated foam nickel is immersed in the solution, and the lining is transferred to the stainless steel reactor for sealing. Heat water at 120 ℃ for 6h, cool it naturally to room temperature, take out the reactor, wash the product with deionized water for 3-4 times, and then dry it in a vacuum drying oven at 60 ℃ for 12h. CoV / NF was obtained.

[0036] (2) Dissolve 3mmol thiourea in 30ml deionized...

Embodiment 3

[0038] (1) The bimetallic doped Ni 3 S 2 The preparation method of the electrocatalyst for oxygen evolution: cut the foam nickel to a size of 1*1.5cm, ultrasonically clean the cut foam nickel in 1mhcl, deionized water and absolute ethanol for 20min at a time to remove the oxides and impurities on the surface of foam nickel, and then dry it in vacuum at 60 ℃ for subsequent use. First, 1.6mmol CO (no 3 ) 2 ·6H 2 O、0.08mmol NH4 VO 3 、6mmol CO(NH 2 ) 2 、2.5mmol NH 4 F is dissolved in 40ml deionized water, stirred until transparent, the solution is transferred to the PTFE lining, and then the treated foam nickel is immersed in the solution, and the lining is transferred to the stainless steel reactor for sealing. Heat water at 120 ℃ for 6h, cool it naturally to room temperature, take out the reactor, wash the product with deionized water for 3-4 times, and then dry it in a vacuum drying oven at 60 ℃ for 12h. CoV / NF was obtained.

[0039] (2) Dissolve 3mmol thiourea in 30ml deionized ...

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Abstract

The invention relates to a preparation method of a bimetal doped Ni3S2 oxygen evolution electrocatalyst. The method comprises the following steps: (1) immersing a pretreated foamed nickel substrate in an aqueous solution containing cobalt salt, vanadium salt, ammonium fluoride and urea, and carrying out a hydrothermal reaction to obtain a CoV / NF material grown on the foamed nickel substrate in situ; and (2) immersing the obtained Co-V precursor material in a second reaction kettle filled with a sulfur source aqueous solution, and carrying out hydrothermal vulcanization to obtain the bimetal-doped Ni3S2 oxygen evolution electrocatalyst material. In the obtained catalyst, Co and V are used as doping agents to synergistically improve the performance of the Ni3S2 electrocatalyst in OER; metal nitrate and other cheap and harmless chemicals are selected as raw materials needed in the preparation process, the material cost is reduced, and follow-up production is facilitated.

Description

Technical field: [0001] The invention relates to a bimetallic doped Ni 3 S 2 The invention relates to a preparation method of an oxygen evolution electrocatalyst, which belongs to the technical field of electrolytic water catalysis. Background technology: [0002] With the consumption of fossil fuels, it is of great significance to explore clean and renewable energy sources such as solar energy, wind energy and hydrogen energy to replace fossil fuels Among them, hydrogen is a clean energy carrier that can replace fossil fuels. It has the potential to solve the problem of continuous growth of global energy demand and its environmental protection advantages. Hydrogen production from electrolytic water is a key to solve the problem of renewable energy. However, oxygen evolution reaction (OER) is the bottleneck of electrolytic water, and the kinetic problem is still a fatal disadvantage. In the early stage, Ruo was the most effective electrocatalyst to improve oer performance 2 And i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04C25B11/061
CPCC25B11/091C25B1/04C25B11/061
Inventor 武兰兰白璐李敬德刘桂华杜晓航
Owner HEBEI UNIV OF TECH