Patents by Inventor Kazuki OKAYA

Kazuki OKAYA 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).

  • Catalyst for solid polymer fuel cell and method for producing same
    Patent number: 10998556
    Abstract: The present invention relates to a catalyst for a solid polymer fuel cell, including platinum, cobalt, and zirconium supported as a catalytic metal on a carbon powder carrier, in which the supporting ratio of platinum, cobalt, and zirconium on the carbon powder carrier is Pt:Co:Zr=3:0.5 to 1.5:0.1 to 3.0 by molar ratio. In the present invention, it is preferable that the peak position of Pt3Co seen in the X-ray diffraction pattern of catalyst particles is 2?=41.10° or more and 42.00° or less, and moderate alloying has occurred in the catalytic metal.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: May 4, 2021
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Wataru Hashimoto, Tatsunori Namai, Minoru Ishida, Hitoshi Nakajima, Kazuki Okaya, Takeshi Kaieda, Koichi Matsutani
  • CATALYST FOR SOLID POLYMER FUEL CELL AND METHOD FOR PRODUCING SAME
    Publication number: 20190221858
    Abstract: The present invention relates to a catalyst for a solid polymer fuel cell, including platinum, cobalt, and zirconium supported as a catalytic metal on a carbon powder carrier, in which the supporting ratio of platinum, cobalt, and zirconium on the carbon powder carrier is Pt:Co:Zr=3:0.5 to 1.5:0.1 to 3.0 by molar ratio. In the present invention, it is preferable that the peak position of Pt3Co seen in the X-ray diffraction pattern of catalyst particles is 2?=41.10° or more and 42.00° or less, and moderate alloying has occurred in the catalytic metal.
    Type: Application
    Filed: September 7, 2017
    Publication date: July 18, 2019
    Inventors: Wataru HASHIMOTO, Tatsunori NAMAI, Minoru ISHIDA, Hitoshi NAKAJIMA, Kazuki OKAYA, Takeshi KAIEDA, Koichi MATSUTANI