A kind of active cathode and its preparation method and application

An active cathode and cathode technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of high price, poor activity, poor stability, stable structure and performance, and achieve low cost, good stability, and prevent electrode turtles. cracked effect

Active Publication Date: 2020-12-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above materials are used as the active layer, either they are expensive, or they have poor activity and stability, and it is difficult to maintain stable structure and performance in the harsh cathode working environment.

Method used

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  • A kind of active cathode and its preparation method and application
  • A kind of active cathode and its preparation method and application
  • A kind of active cathode and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) if figure 1 Shown is a flowchart of the manufacturing method of the active cathode of the present invention. A nickel mesh with a size of 10 × 30 mm was cut, placed in acetone for 30 min and ultrasonically treated to remove the oil on the surface, and then rinsed with ultrapure water. The rinsed nickel mesh was etched in 20% (weight) boiling hydrochloric acid for 5 min.

[0042] 2) Rinse with a large amount of ultrapure water, and dry in a vacuum oven for later use.

[0043] 3) Prepare the active coating solution, the formula is as follows:

[0044] Ruthenium trichloride 100-200 g / L

[0045] Hydrochloric acid 20g / L

[0046] Take 100 mL of the prepared active coating solution and place it in a beaker, immerse the pretreated nickel mesh substrate in the active coating solution for 30 min, and then slowly lift it out of the beaker. Then, the nickel mesh with the active coating solution attached was placed in a vacuum oven and dried at 80 °C for 2 h.

[0047] 4) Th...

Embodiment 2

[0054] 1) Cut out a nickel mesh with a size of 10×30 mm, place it in acetone for 30 min and ultrasonically treat it to remove the oil on the surface, and then rinse it with ultrapure water. Place the rinsed nickel mesh in 20% (weight) boiling hydrochloric acid for 5 minutes.

[0055] 2) Rinse with a large amount of ultrapure water, and dry in a vacuum oven for later use.

[0056] 3) Prepare the active coating solution, the formula is as follows:

[0057] Ruthenium trichloride 100 g / L

[0058] Cerium chloride 20-50 g / L

[0059] Hydrochloric acid 20g / L

[0060] Take 100 mL of the prepared active coating solution and place it in a beaker, immerse the pretreated nickel mesh substrate in the active coating solution for 30 min, and then slowly lift it out of the beaker. Then, the nickel mesh with the active coating solution attached was placed in a vacuum oven and dried at 80 °C for 2 h.

[0061] 4) The above dried nickel mesh was put into a muffle furnace for sintering, the ho...

Embodiment 3

[0067] 1) Cut out a nickel mesh with a size of 10×30 mm, place it in acetone for 30 min and ultrasonically treat it to remove the oil on the surface, and then rinse it with ultrapure water. Place the rinsed nickel mesh in 20% (weight) boiling hydrochloric acid for 5 minutes.

[0068] 2) Then rinse with a large amount of ultrapure water, and dry in a vacuum oven for later use.

[0069] 3) Prepare the active coating solution, the formula is as follows:

[0070] Ruthenium trichloride 100 g / L

[0071] Cerium chloride 20-50 g / L

[0072] Hydrochloric acid 20g / L

[0073] Take 100 mL of the prepared active coating solution and place it in a beaker, immerse the pretreated nickel mesh substrate in the active coating solution for 30 min, and then slowly lift it out of the beaker. Then, the nickel mesh with the active coating solution attached was placed in a vacuum oven and dried at 80 °C for 2 h.

[0074] 4) The above dried nickel mesh was put into a muffle furnace for sintering, t...

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Abstract

The invention relates to an active cathode as well as a preparation method and application thereof. The active cathode comprises an active coating, wherein the active coating is prepared from one or several kinds of materials from RuO2, CeO2 and Pt; the active cathode optionally comprises a conductive metal substrate. The active cathode has lower hydrogen separationevolution potential in alkali liquid; the whole stability of the electrode is high; good revere current impact resistance capability is realized; the active cathode is applicable to the electrolysis reaction under the high current density condition in chlor-alkali industry.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an active cathode and its preparation method and application. Background technique [0002] The chlor-alkali industry is the country's basic raw material industry, and its products such as caustic soda, chlorine and hydrogen are widely used in light industry, chemical industry, national defense, metallurgy and other aspects. However, the process of electrolyzing salt water in the chlor-alkali industry often consumes a large amount of electric energy. Therefore, how to use new materials and technologies to reduce energy consumption and realize an economical and efficient electrolysis process is a problem that the chlor-alkali industry has to face. [0003] In the chlor-alkali industry, the electrode reaction equation for the electrolysis of salt water is [0004] Anode: 2Cl - - 2e = Cl 2 [0005] Cathode: 2H 2 O + 2e = OH - +H 2 [0006] The relationship betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/04C25B1/46
CPCC25B1/46C25B11/051C25B11/073
Inventor 王峰张正平杨少轩刘彤彤
Owner BEIJING UNIV OF CHEM TECH
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