Preparation method for nickel hydroxide/nickel/graphene composite hydrogen evolution electrode with hierarchical structure

A technology of hydrogen evolution electrode and hierarchical structure, which is applied in the direction of electrodes, electrode shapes/types, electrolytic coatings, etc., can solve the problems of large distances in hydrogen evolution performance, and achieve the effects of preventing metal agglomeration, good stability, and enhancing binding ability

Active Publication Date: 2017-07-21
东营市广利临港产业园有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen evolution performance of nickel-based electrodes and noble metals such as Pt stil...

Method used

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  • Preparation method for nickel hydroxide/nickel/graphene composite hydrogen evolution electrode with hierarchical structure
  • Preparation method for nickel hydroxide/nickel/graphene composite hydrogen evolution electrode with hierarchical structure
  • Preparation method for nickel hydroxide/nickel/graphene composite hydrogen evolution electrode with hierarchical structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Pretreatment of nickel foam substrate

[0031] Before electrodeposition, immerse the foamed nickel substrate in a beaker filled with deionized water, and ultrasonically treat it for 5 minutes; then put the foamed nickel into 3M HCl solution for acidification for 30 seconds, then wash it with deionized water until neutral, and dry it for later use.

[0032] (2) Preparation of Ni / rGO composite electrodes by high-gravity electrodeposition

[0033] With distilled water as solvent, every liter of plating solution contains 350g of nickel sulfamate, 10g of nickel chloride, 30g of ammonium chloride and 1.0g of graphene oxide, and the pH value of the plating solution is 3.8. After 2 hours of treatment under power, a uniform, dark green mixed solution was obtained. The high-gravity electrodeposition process is carried out in a cylindrical reactor, and the substrate processed in step (1) is fixed on the inner wall of the cylindrical reactor as the electrodeposition cathode, a...

Embodiment 2

[0039] (1) Pretreatment of nickel foam substrate

[0040] Before electrodeposition, immerse the foamed nickel substrate in a beaker filled with deionized water, and ultrasonically treat it for 5 minutes; then put the foamed nickel into 3M HCl solution for acidification for 30 seconds, then wash it with deionized water until neutral, and dry it for later use.

[0041] (2) Preparation of Ni / rGO composite electrodes by high-gravity electrodeposition

[0042] With distilled water as solvent, every liter of plating solution contains 350g of nickel sulfamate, 10g of nickel chloride, 30g of ammonium chloride and 1.0g of graphene oxide, and the pH value of the plating solution is 3.8. After 2 hours of treatment under power, a uniform, dark green mixed solution was obtained. The high-gravity electrodeposition process is carried out in a cylindrical reactor, and the substrate processed in step (1) is fixed on the inner wall of the cylindrical reactor as the electrodeposition cathode, a...

Embodiment 3

[0048] (1) Pretreatment of nickel foam substrate

[0049] Before electrodeposition, immerse the foamed nickel substrate in a beaker filled with deionized water, and ultrasonically treat it for 5 minutes; then put the foamed nickel into 3M HCl solution for acidification for 30 seconds, then wash it with deionized water until neutral, and dry it for later use.

[0050] (2) Preparation of Ni / rGO composite electrodes by high-gravity electrodeposition

[0051] With distilled water as solvent, every liter of plating solution contains 350g of nickel sulfamate, 10g of nickel chloride, 30g of ammonium chloride and 1.0g of graphene oxide, and the pH value of the plating solution is 3.8. After 2 hours of treatment under power, a uniform, dark green mixed solution was obtained. The high-gravity electrodeposition process is carried out in a cylindrical reactor, and the substrate processed in step (1) is fixed on the inner wall of the cylindrical reactor as the electrodeposition cathode, a...

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Abstract

The invention provides a preparation method for a Ni(OH)2/Ni/rGO composite hydrogen evolution electrode with a hierarchical structure. The preparation method comprises the following main steps that a foamed nickel base subjected to ultrasound and acidizing treatment serves as an electro-deposition negative electrode firstly, and a Ni/rGO composite hydrogen evolution electrode with a large surface area is prepared through a super-gravity electro-deposition method; then metal Ni particles on the surface of the Ni/rGO electrode react with one of urea, ammonium chloride and ammonium fluoride through a hydrothermal method, the nickel particles serve as a nickel source, and a layer of Ni(OH)2 nanosheets are vertically grown on the surface root position of the nickel particles; and the finally obtained hydrogen evolution electrode has three-stage structures, namely the first-stage structure is foamed nickel base, the second-stage structure is nano nickel particles loaded with graphene sheets, and the third-stage structure is a Ni(OH)2/Ni/rGO composite plating layer of the Ni(OH)2 nanosheets. According to the preparation method for the Ni(OH)2/Ni/rGO composite hydrogen evolution electrode with the hierarchical structure, the prepared composite electrode has the unique hierarchical structure, a large specific surface area and an excellent table hydrogen evolution property.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by electrolysis, in particular to a method for preparing a hydrogen evolution electrode. [0002] technical background [0003] Nowadays, energy development and environmental issues have drawn the attention of the whole world and all human beings, especially today when coal, oil and many other non-renewable resources are scarce. The consumption of fossil energy products has brought about serious environmental pollution and the greenhouse effect. The PM 2.5 that people have recently paid attention to mainly comes from processes such as daily power generation, industrial production, and vehicle exhaust emissions. These are also some environmental problems brought about by fossil energy. Facing the contradiction between the increasing demand for energy and the depletion of energy reserves, it is urgent to find alternative clean energy. [0004] Hydrogen energy is known as the cleanest ene...

Claims

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Application Information

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IPC IPC(8): C23F17/00C25D15/00C23C18/12C25B1/04C25B11/03C25B11/06
CPCC23C18/1204C23C18/1241C23C18/1283C23F17/00C25B1/04C25D15/00C25B11/031C25B11/051C25B11/091Y02E60/36
Inventor 邵光杰王丽欣秦秀娟马志鹏杜静张佩佩白磊曹磊李敬梅
Owner 东营市广利临港产业园有限公司
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