公开(公告)号：US20240263327A1

公开(公告)日：2024-08-08

申请号：US18569324

申请日：2022-07-01

Applicant: DE NORA PERMELEC LTD

Inventor： Awaludin ZAENAL ,  Akihiro KATO ,  Takaaki NAKAI ,  Osamu ARIMOTO ,  Akihiro MADONO ,  Sayaka FUKUDA

IPC: C25B11/061 ,  C25B1/04

CPC classification number: C25B11/061 ,  C25B1/04

Abstract: The present invention provides a simple method for producing an electrode having improved oxygen evolution reaction (OER) activity without a need for catalyst coating and an electrode produced by this production method. The method is a method for producing an electrode including a step of subjecting an electrically conductive substrate comprising a nickel alloy comprising 30 to 70% by mass of Ni and 30 to 70% by mass of Fe, provided that Ni+Fi=100% by mass, to a thermal treatment, and a step of etching the thermally treated electrically conductive substrate with an etchant comprising at least any acid of an organic acid and a weak inorganic acid. The electrode is an electrode that is produced by this production method and that is useful as an oxygen evolution anode or the like.

公开(公告)号：US20230304174A1

公开(公告)日：2023-09-28

申请号：US18041133

申请日：2021-04-08

Applicant: DE NORA PERMELEC LTD

Inventor： Osamu ARIMOTO ,  Akihiro KATO ,  Takaaki NAKAI

IPC: C25B11/093 ,  C25B1/04 ,  C25B11/052

CPC classification number: C25B11/093 ,  C25B1/04 ,  C25B11/052

Abstract: Provided is an anode for alkaline water electrolysis comprising a conductive substrate and a coating formed on a surface of the conductive substrate, wherein the coating comprises



1) a lithium-containing nickel oxide,
2) an iridium oxide, and
3) at least one of a strontium oxide, a lanthanum oxide, and a calcium oxide.

公开(公告)号：US20250051931A1

公开(公告)日：2025-02-13

申请号：US18722246

申请日：2022-09-29

Applicant: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY ,  DE NORA PERMELEC LTD

Inventor： Ryuta MISUMI ,  Shigenori MITSUSHIMA ,  Hayata IKEDA ,  Yoshinori NISHIKI ,  Akihiro KATO ,  Takaaki NAKAI

IPC: C25B1/02 ,  C25B1/26

Abstract: There is provided an aqueous solution electrolysis method that makes it possible to reduce the amount of bubbles covering an electrode and generate gases such as hydrogen and oxygen with excellent energy efficiency. The method is an electrolysis method for electrolyzing an aqueous-solution-based electrolyte to generate at least any one of hydrogen, oxygen, and chlorine, wherein the electrolyte contains a water-soluble alcohol. For example, as the electrolyte, an alkali aqueous solution containing about 0.1 to about 10% by volume of a water-soluble alcohol including a tertiary alcohol, such as 2-methylpropan-2-ol and 2-methylbutan-2-ol, and about 1 to 10 mol/L of an alkali component may be subjected to water electrolysis, and the electrolyte is electrolyzed using, for example, an electrolytic cell having an anode chamber and a cathode chamber.

公开(公告)号：US20230109702A1

公开(公告)日：2023-04-13

申请号：US17905232

申请日：2021-03-08

Applicant: DE NORA PERMELEC LTD ,  KAWASAKI JUKOGYO KABUSHIKI KAISHA ,  NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY

Inventor： Shigenori MITSUSHIMA ,  Yoshiyuki KURODA ,  Shohei TAKATSU ,  Ikuo NAGASHIMA ,  Tatsuya TANIGUCHI ,  Akihiko INOMATA ,  Ayaka NAGAI ,  Yoshinori NISHIKI ,  Akihiro KATO ,  Awaludin ZAENAL ,  Takaaki NAKAI

IPC: C25B11/052 ,  C25B1/04 ,  C25B11/061 ,  C25B11/077 ,  C25B15/08 ,  C25B15/029

Abstract: The present invention realizes industrially excellent effects such that when electric power having a large output fluctuation, such as renewable energy, is used as a power source, electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a longer period of time, and in addition, the present invention provides a technique that enables forming a catalyst layer of an oxygen generation anode, which gives such excellent effects, with a more versatile materials and by a simple electrolysis method. Provided are an alkaline water electrolysis method including supplying an electrolyte obtained by dispersing a catalyst containing a hybrid nickel-iron hydroxide nanosheet (NiFe-ns) being a composite of a metal hydroxide and an organic substance to an anode chamber and a cathode chamber, and using the electrolyte for electrolysis in each chamber in common, an alkaline water electrolysis method including supplying an electrolyte obtained by dispersing a catalyst containing the NiFe-ns to an anode chamber and a cathode chamber, and performing electrolytic deposition of the NiFe-ns in the electrolytic cell during operation to electrolytically deposit the NiFe-ns on a surface of an electrically conductive substrate having a catalyst layer formed on a surface of an oxygen generation anode, thereby recovering and improving electrolysis performance, and an alkaline water electrolysis anode.