Patents by Inventor Hideshi OOKA

Hideshi OOKA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for water electrolysis, and method for determining drive potential of water electrolysis
    Patent number: 11572630
    Abstract: The present invention provides a water electrolysis method comprising: supplying at least water into an electrolysis cell which includes a solid polymer electrolyte membrane, and an anode and a cathode disposed sandwiching the solid polymer electrolyte membrane therebetween; and providing a potential P between the anode and the cathode to generate oxygen from the anode, wherein an oxidation catalyst containing at least one of first transition metals is present on at least a part of a surface of the anode, and the potential P satisfies P1<P<P2, wherein P1 indicates a lowest potential at which oxygen is generated from the anode, and P2 indicates a lowest potential P2 at which a quantitative index of a dissolved chemical species derived from the oxidation catalyst begins to show potential dependence.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: February 7, 2023
    Assignee: RIKEN
    Inventors: Ryuhei Nakamura, Hideshi Ooka, Nadege Bonnet, Ailong Li, Shuang Kong, Hongxian Han
  • METHOD AND APPARATUS FOR WATER ELECTROLYSIS, AND METHOD FOR DETERMINING DRIVE POTENTIAL OF WATER ELECTROLYSIS
    Publication number: 20210301406
    Abstract: The present invention provides a water electrolysis method comprising: supplying at least water into an electrolysis cell which includes a solid polymer electrolyte membrane, and an anode and a cathode disposed sandwiching the solid polymer electrolyte membrane therebetween; and providing a potential P between the anode and the cathode to generate oxygen from the anode, wherein an oxidation catalyst containing at least one of first transition metals is present on at least a part of a surface of the anode, and the potential P satisfies P1<P<P2, wherein P1 indicates a lowest potential at which oxygen is generated from the anode, and P2 indicates a lowest potential P2 at which a quantitative index of a dissolved chemical species derived from the oxidation catalyst begins to show potential dependence.
    Type: Application
    Filed: August 9, 2019
    Publication date: September 30, 2021
    Applicant: RIKEN
    Inventors: Ryuhei NAKAMURA, Hideshi OOKA, Nadege BONNET, Ailong LI, Shuang KONG, Hongxian HAN