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Electrode for electrolysis, electrolytic cell, and method for manufacturing electrode for electrolysis

A manufacturing method and electrode technology, applied in the direction of electrodes, electrolytic components, electrolytic process, etc., can solve the problems of high overvoltage, time-consuming, etc., and achieve the effect of reducing overvoltage

Active Publication Date: 2013-08-21
ASAHI KASEI KK
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in conventional anodes such as DSA, there is a problem that the overvoltage is high immediately after the start of electrolysis, and it takes time to activate the catalyst until the overvoltage stabilizes to a low level.

Method used

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  • Electrode for electrolysis, electrolytic cell, and method for manufacturing electrode for electrolysis

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Embodiment 1

[0116] As the conductive substrate, a stretched titanium substrate having a large pore size LW of 6 mm, a small pore size SW of 3 mm, and a plate thickness of 1.0 mm was used. The stretched substrate was fired at 540° C. for 4 hours in the air to form an oxide film on the surface. Thereafter, acid treatment was performed at 85° C. for 4 hours in 25% by mass of sulfuric acid to form fine unevenness on the surface of the conductive substrate, thereby performing pretreatment.

[0117] Next, in such a way that the molar ratio of ruthenium, iridium, and titanium is 35:20:45, an aqueous ruthenium chloride solution (manufactured by Tanaka Precious Metals Co., Ltd., ruthenium concentration: 100 g / L) is cooled to below 5°C with dry ice, while stirring Next, titanium tetrachloride (manufactured by Kishida Chemical Co., Ltd.) was added little by little, and then an aqueous solution of iridium chloride (manufactured by Tanaka Precious Metals Co., Ltd., iridium concentration was 100 g / L) w...

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Abstract

The invention provides an electrode for electrolysis, an electrolytic cell, and a method for manufacturing the electrode for electrolysis. The electrode for electrolysis is capable of reducing overvoltage in the early period of electrolysis. The electrode for electrolysis comprises a conductive base material, a first layer formed on the surface of the conductive base material and a second layer formed on the surface of the first layer, wherein the first layer contains ruthenium oxide, iridium oxide and titanic oxide and the second layer contains the ruthenium element and does not contain the iridium element.

Description

technical field [0001] The present invention relates to an electrode for electrolysis, an electrolytic cell, and a method for manufacturing the electrode for electrolysis. Background technique [0002] In the ion exchange membrane salt electrolysis process, in order to reduce power consumption, a technology capable of maintaining low electrolysis voltage for a long period of time is required. If the details of the electrolysis voltage are analyzed in detail, in addition to the theoretically required voltage, the voltage caused by the resistance of the ion exchange membrane and the structural resistance of the electrolytic cell, the overvoltage of the anode and cathode, and the voltage caused by the The voltage caused by the distance between the anode and the cathode, etc. In addition, if electrolysis is continued for a long period of time, the voltage may rise due to impurities in the brine or various factors. Among the electrolysis voltages described above, various studie...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B9/00B05D7/24B05D3/08
Inventor 羽根田刚
Owner ASAHI KASEI KK
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