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Preparation method of hydrogen evolution electrode with high catalytic activity and high stability

A technology with high catalytic activity and high stability, applied in the direction of electrodes, electrode shapes/types, electrolytic components, etc., can solve the problems of high cost, low catalytic activity, poor stability, etc., and achieve low cost, good catalytic hydrogen evolution performance, good stability effect

Inactive Publication Date: 2013-01-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high catalytic activity for the shortcomings of the existing hydrogen evolution electrode, such as low catalytic activity, poor stability and high cost And the preparation method of high stability hydrogen evolution electrode

Method used

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  • Preparation method of hydrogen evolution electrode with high catalytic activity and high stability
  • Preparation method of hydrogen evolution electrode with high catalytic activity and high stability
  • Preparation method of hydrogen evolution electrode with high catalytic activity and high stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Pretreatment of Ni substrate

[0029] 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;

[0030] (2) Preparation of Ni plating precursor electrode by pulse electroplating

[0031]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 plating solution is: 40g / L nickel sulfate, 38.5 g / L sodium hypophosphite, 10g / L boric acid, 6g / L ammonium chloride, the pH value of the plating solution is 3, the temperature of the plating solution is 25°C, and the average current density is 40mA / cm 2 , the pulse frequency is 1000Hz, the duty ratio is 1:5, and the...

Embodiment 2

[0041] Step (1) is the same as step (1) in Example 1;

[0042] (2) Preparation of Ni-coated precursor electrode by pulse electroplating

[0043] 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 plating solution is: 20 g / L nickel sulfate, 60 g / L sodium hypophosphite, 10 g / L boric acid, 2 g / L ammonium chloride, the temperature of the plating solution is 20°C, and the average current density is 30 mA / cm 2 , the pulse frequency is 800Hz, the duty ratio is 1:4, and the plating time is 300s. Rinse with deionized water after electroplating to remove residual plating solution, and make Ni plating layer precursor electrode after natural air drying;

[0044] (3) Preparation of nickel-based Ni / RuO 2 Compound electrode

[0045] With n-butanol as solvent, RuCl 3 Dissolved in n-butanol to prepare 30mg / mL RuCl 3 The n-butanol solution was mixed evenly by ma...

Embodiment 3

[0049] Step (1) is the same as step (1) in Example 1;

[0050] (2) Preparation of Ni-coated precursor electrode by pulse electroplating

[0051] 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 plating solution is: 60g / L nickel sulfate, 20 g / L sodium hypophosphite, 5 g / L boric acid, 6 g / L ammonium chloride, the temperature of the plating solution is 25°C, and the average current density is 20 mA / cm 2 , the pulse frequency is 1200Hz, the duty ratio is 1:4, and the plating time is 300s. Rinse with deionized water after electroplating to remove residual plating solution, and make Ni plating layer precursor electrode after natural air drying;

[0052] (3) Preparation of nickel-based Ni / RuO 2 Compound electrode

[0053] With n-butanol as solvent, RuCl 3 Dissolved in n-butanol to prepare 10mg / mL RuCl 3 The n-butanol solution was mixed evenly by mag...

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Abstract

The invention provides a preparation method of a hydrogen evolution electrode with high catalytic activity and high stability, belonging to the field of electro-catalytic hydrogen evolution in the chlorine-alkali industry. The preparation method comprises the following steps of: forming a Ni plating on a Ni substrate through pulse electroplating; coating a Ru-containing coating solution on the Ni plating, wherein nickel and ruthenium are subjected to partial replacement at the time; and finally roasting to form a nickel-based Ni / RuO2 composite electrode. On one hand, the Ni plating is formed on the nickel substrate through the pulse electroplating, so that the plating is fine and compact to increase the specific surface area of the electrode; and on the other hand, after the nickel and the ruthenium are subjected to replacement and roasting, the two metals, i.e., the nickel and the ruthenium, act to form the nickel-based Ni / RuO2 composite electrode with good hydrogen evolution catalytic performance, wherein the stability of the electrode is improved in the roasting process. The method is simple and feasible and is low in production cost; the composite hydrogen evolution electrode prepared by using the method can be used for electro-catalytic hydrogen evolution in the chlorine-alkali industry and can also be widely applied to the field of various catalytic hydrogen evolution, such as solar electrolysed-water-based hydrogen production and water electrolysis industry.

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 with high catalytic activity and high stability. Background technique [0002] The chlor-alkali industry is a pillar basic industry of the country, and it is also a big energy consumer. With the progress of the times and the continuous development of science and technology and economy, energy has become an important factor affecting human society. At present, traditional energy sources such as coal, oil, and natural gas still play a pivotal role in the world's economic development, but the reserves of these resources on the earth are very limited, and the energy crisis has become an urgent problem for human beings to solve. Among many new energy sources, hydrogen energy, as a secondary clean energy source with light weight, no pollution, high calorific value and wide application, has been highly va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/00C25B11/04C25B11/02C25D5/18C25D7/00C23C22/74
Inventor 魏子栋陈雪陈四国李莉丁炜王进
Owner CHONGQING UNIV
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