Patents by Inventor Takehito NISHIKAWA

Takehito NISHIKAWA 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 for manufacturing platinum catalyst, and fuel cell including the same
    Patent number: 10749186
    Abstract: A platinum core-shell catalyst that uses palladium (Pd) as a core metal, or a platinum catalyst containing platinum and a metal besides platinum is manufactured industrially on a mass scale. The platinum catalyst is supported on carbon and has excellent oxygen reduction activity. The platinum catalyst is made for a fuel cell by bringing about the presence of a chemical species imparting higher potential than the initial oxide formation potential of the platinum of the platinum catalyst, and by bringing about the presence of a chemical species imparting lower potential than the initial oxide formation potential of the platinum of the platinum catalyst. The manufacture is carried out in a dispersion solution of the platinum catalyst dispersed in an acidic solution containing protons.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: August 18, 2020
    Assignee: THE DOSHISHA
    Inventors: Minoru Inaba, Hideo Daimon, Kosuke Okuno, Shunya Higuchi, Yuki Matsui, Naoya Aoki, Hideo Inoue, Takehito Nishikawa
  • Electrode catalyst, method for producing the same, and electrode catalyst layer using electrode catalyst
    Patent number: 10411268
    Abstract: Provided is an electrode catalyst having enhanced catalytic activity (oxygen reduction reaction (ORR) specific activity). Disclosed is an electrode catalyst containing a catalyst metal particle(s) and a spacer(s) supported on a catalyst support, in which a ratio (dsp/dcat) of an average diameter of the spacer(s) (dsp) with respect to an average diameter of the catalyst metal particle(s) (dcat) is from 3.5 to 10.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: September 10, 2019
    Assignees: NISSAN MOTOR CO., LTD., ISHIFUKU METAL INDUSTRY CO., LTD.
    Inventors: Atsushi Ohma, Kazuki Arihara, Yoshihisa Furuya, Hideo Inoue, Takehito Nishikawa
  • ELECTRODE CATALYST, METHOD FOR PRODUCING THE SAME, AND ELECTRODE CATALYST LAYER USING ELECTRODE CATALYST
    Publication number: 20190165382
    Abstract: Provided is an electrode catalyst having enhanced catalytic activity (oxygen reduction reaction (ORR) specific activity). Disclosed is an electrode catalyst containing a catalyst metal particle(s) and a spacer(s) supported on a catalyst support, in which a ratio (dsp/dcat) of an average diameter of the spacer(s) (dsp) with respect to an average diameter of the catalyst metal particle(s) (dcat) is from 3.5 to 10.
    Type: Application
    Filed: May 10, 2017
    Publication date: May 30, 2019
    Applicants: NISSAN MOTOR CO., LTD., ISHIFUKU METAL INDUSTRY CO., LTD.
    Inventors: Atsushi OHMA, Kazuki ARIHARA, Yoshihisa FURUYA, Hideo INOUE, Takehito NISHIKAWA
  • Method for Manufacturing Platinum Catalyst, and Fuel Cell Including the Same
    Publication number: 20180047993
    Abstract: A platinum core-shell catalyst that uses palladium (Pd) as a core metal, or a platinum catalyst containing platinum and a metal besides platinum is manufactured industrially on a mass scale. The platinum catalyst is supported on carbon and has excellent oxygen reduction activity. The platinum catalyst is made for a fuel cell by bringing about the presence of a chemical species imparting higher potential than the initial oxide formation potential of the platinum of the platinum catalyst, and by bringing about the presence of a chemical species imparting lower potential than the initial oxide formation potential of the platinum of the platinum catalyst. The manufacture is carried out in a dispersion solution of the platinum catalyst dispersed in an acidic solution containing protons.
    Type: Application
    Filed: March 8, 2016
    Publication date: February 15, 2018
    Inventors: Minoru INABA, Hideo DAIMON, Kosuke OKUNO, Shunya HIGUCHI, Yuki MATSUI, Naoya AOKI, Hideo INOUE, Takehito NISHIKAWA