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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in conventional anodes such as DSA, there is a problem that the overvoltage is high immediately after

Method used

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

Examples

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Example Embodiment

[0115] [Example 1]

[0116] As the conductive substrate, a stretched substrate made of titanium 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. In the air, the stretched base material was fired at 540°C for 4 hours to form an oxide film on the surface. After that, acid treatment was performed in 25% by mass sulfuric acid at 85°C for 4 hours to form fine irregularities on the surface of the conductive substrate, thereby performing pretreatment.

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

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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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