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Preparation method of efficient Ni-Mo-P/Ni hydrogen evolution electrode

A hydrogen evolution electrode, ni-mo-p technology, applied in the field of electrocatalytic hydrogen evolution, can solve the problem of high electronegativity of rare earth elements, achieve the effect of large specific surface area, unique amorphous structure, and small internal stress

Inactive Publication Date: 2012-11-21
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electronegativity of rare earth elements is high, and it is difficult to reduce them into the alloy coating from the aqueous solution.

Method used

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  • Preparation method of efficient Ni-Mo-P/Ni hydrogen evolution electrode
  • Preparation method of efficient Ni-Mo-P/Ni hydrogen evolution electrode
  • Preparation method of efficient Ni-Mo-P/Ni hydrogen evolution electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Pretreatment of Ni substrate

[0030] First, mechanically polish the Ni sheet to remove oxides on the surface to make it metallic luster, and then clean it with ultrapure water; It is a mixed aqueous solution of 45g / L sodium sulfate, 45g / L sodium carbonate and 45g / L sodium chloride; then rinse it with deionized water, dry it naturally and immerse it in absolute ethanol solution for use;

[0031] (2) Preparation of Ni-Mo-P / Ni electrode by pulse electrodeposition

[0032] A two-electrode system is adopted, the Ni substrate treated in step (1) is used as the working electrode, and the Ni plate is used as the counter electrode. The composition of Ni-Mo-P plating solution is: 40g / L nickel sulfate aqueous solution, 30 g / L sodium molybdate aqueous solution, 10 g / L sodium hypophosphite aqueous solution, 150 g / L trisodium citrate aqueous solution, 200 g / L L sodium chloride aqueous solution, the pH value of the plating solution is 8, and the temperature of the plating solut...

Embodiment 2

[0035] Step (1) is the same as step (1) in Example 1;

[0036] (2) Preparation of Ni-Mo-P / Ni electrode by pulse electrodeposition

[0037] A two-electrode system is adopted, the Ni substrate treated in step (1) is used as the working electrode, and the Ni plate is used as the counter electrode. The composition of Ni-Mo-P plating solution is: 20g / L nickel nitrate aqueous solution, 50 g / L sodium molybdate aqueous solution, 60 g / L sodium hypophosphite aqueous solution, 150 g / L trisodium citrate aqueous solution, 10 g / L L sodium chloride aqueous solution, the pH value of the plating solution is 10, and the temperature of the plating solution is 60°C. The pulse peak current density is 30A / dm2 , the pulse on time is 0.1ms, the pulse off time is 0.5ms, and the electrodeposition time is 5s. Rinse with deionized water after electroplating to remove residual plating solution, and make Ni-Mo-P electrode after natural air drying.

[0038] Prepared Ni-Mo-P / Ni plated electrode and pure n...

Embodiment 3

[0040] Step (1) is the same as step (1) in Example 1;

[0041] (2) Preparation of Ni-Mo-P / Ni electrode by pulse electrodeposition

[0042] A two-electrode system is adopted, the Ni substrate treated in step (1) is used as the working electrode, and the Ni plate is used as the counter electrode. The composition of the Ni-Mo-P plating solution is: 60 g / L nickel chloride aqueous solution, 10 g / L ammonium molybdate aqueous solution, 30 g / L sodium hypophosphite aqueous solution, 20 g / L trisodium citrate aqueous solution, 300 g / L sodium chloride aqueous solution, the pH value of the plating solution is 1, and the temperature of the plating solution is 40°C. Pulse peak current density is 10A / dm 2 , the pulse on time is 10ms, the pulse off time is 50ms, and the electrodeposition time is 300s. Rinse with deionized water after electroplating to remove residual plating solution, and make Ni-Mo-P electrode after natural air drying;

[0043] (3), Ni-Mo-P / Ni coating hydrogen evolution p...

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Abstract

The invention provides a preparation method of an efficient Ni-Mo-P / Ni hydrogen evolution electrode, which belongs to the field of electro-catalysis hydrogen evolution. The method comprises steps as follows: removing an oxide layer and oil matters from the surface of a nickel sheet by mechanical polishing and ultrasonic washing; then plating the surface of the pre-processed nickel sheet by pulse electrodeposition, doping P into an Ni-Mo coating to form an Ni-Mo-P nano-crystalline coating with excellent hydrogen evolution performance, wherein the Ni-Mo-P nano-crystalline coating is plated uniformly and is located between a crystalline state structure and an amorphous state structure. The method is simple and feasible, the production cost is low; and the Ni-Mo-P / Ni hydrogen evolution electrode prepared by the method is not only applicable to electro-catalysis hydrogen evolution in chlorine alkali industry, but also is widely applicable to various catalytic hydrogen evolution fields such as solar hydrogen production by water electrolysis, and water electrolysis industry and the like.

Description

technical field [0001] The invention belongs to the field of electrocatalytic hydrogen evolution, in particular to a method for preparing a high-efficiency Ni-Mo-P / Ni hydrogen evolution electrode. Background technique [0002] As an efficient, clean and ideal secondary energy, hydrogen energy has always been valued by researchers from all over the world. Hydrogen production by electrolysis of water is one of the most mature and cheap methods for hydrogen production. At present, the electrolytic water hydrogen evolution electrodes used in industry are mainly Rany Ni, low carbon steel and other materials, but there are disadvantages such as large cell voltage, high overpotential, excessive energy consumption and easy corrosion, which have become important factors restricting the development of the chlor-alkali industry. Although hydrogen evolution electrodes with high activity and low energy consumption have appeared at home and abroad, they are expensive and have high produc...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/04C25D3/56C25D5/18
CPCY02E70/10Y02E60/366Y02E60/36
Inventor 魏子栋王进陈四国李莉陈雪刘颖
Owner CHONGQING UNIV
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