Electrode for electrolysis, manufacturing method of electrode for electrolysis, and electrolyzer

Patent metadata

Field	Value
Publication number	US-2018282884-A1
Application number	US-201715753646-A
Country	US
Kind code	A1
Filing date	Apr 27, 2017
Priority date	Apr 27, 2016
Publication date	Oct 4, 2018
Grant date	—

Abstract

Provided are an electrode for electrolysis having excellent durability against reverse current, and a method that enables production of the electrode for electrolysis at low cost. The electrode for electrolysis 130 includes a conductive substrate 132 on which a catalyst layer is formed, and a reverse current absorption body 134 that is coupled to the conductive substrate 132 in a detachable manner, wherein the reverse current absorption body 134 is formed from a sintered compact containing nickel. The method for producing the electrode for electrolysis 130 includes a sintered compact formation step of obtaining the sintered compact by sintering a raw material powder composed of any one of Raney nickel alloy particles containing nickel and an alkali-soluble metal element, metallic nickel particles, and a mixture of Raney nickel alloy particles and metallic nickel particles, and a coupling step of coupling the sintered compact to the conductive substrate 132.

First claim

1 . An electrode for electrolysis comprising:
a conductive substrate on which a catalyst layer is formed, and at least one reverse current absorption body that is coupled to the conductive substrate in a detachable manner, wherein the at least one reverse current absorption body is formed from a sintered compact containing nickel.

2 . The electrode for electrolysis according to claim 1 , wherein the at least one reverse current absorption body is coupled to an end portion of the conductive substrate.

3 . The electrode for electrolysis according to claim 1 , wherein a nickel content in the sintered compact containing nickel is from 45 to 90% by mass.

4 . The electrode for electrolysis according to claim 1 , wherein a density of the at least one reverse current absorption body is from 2.00 to 6.51 g/cm 3 .

5 . A method for producing the electrode for electrolysis according to claim 1 , the method comprising:
a sintered compact formation step of obtaining the sintered compact by sintering a raw material powder composed of any one of Raney nickel alloy particles containing nickel and an alkali-soluble metal element, metallic nickel particles, and a mixture of the Raney nickel alloy particles and the metallic nickel particles, and a coupling step of coupling the sintered compact to the conductive substrate.

6 . The method for producing the electrode for electrolysis according to claim 5 , further comprising:
a post-coupling immersion step of immersing the sintered compact that has been coupled to the conductive substrate in the coupling step in an electrolyte containing an alkali metal hydroxide.

7 . The method for producing the electrode for electrolysis according to claim 5 , further comprising:
a pre-coupling immersion step of immersing the sintered compact obtained in the sintered compact formation step in a solution containing an alkali metal hydroxide, wherein the sintered compact that has been subjected to the pre-coupling immersion step is then coupled to the conductive substrate in the coupling step.

8 . An electrolyzer having an anode, an anode chamber housing the anode, a cathode, a cathode chamber housing the cathode, and a diaphragm that separates the anode chamber and the cathode chamber, wherein
at least one of the cathode and the anode is the electrode for electrolysis according to claim 1 .

Assignees

• De Nora Permelec Ltd

Inventors

• Takahashi Suguru
• Madono Akihiro
• Kishi Takamichi
• Arimoto Osamu

Classifications

• C25B11/04 Primary

  characterised by the material · CPC title

• C25B1/46 Primary

  in diaphragm cells · CPC title

• C25B11/03

  perforated or foraminous · CPC title

• C25B15/00

  Operating or servicing cells · CPC title

• C25B9/08

  Chemistry & Metallurgy · mapped topic