Patents by Inventor Koichi Matsutani

Koichi Matsutani 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).

  • Patent number: 11362342
    Abstract: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum are supported on a carbon powder carrier. The invention provides a catalyst for solid polymer fuel cells in which the ratio of zerovalent platinum to platinum present on the surfaces of the catalyst particles is 80% or more and 100% or less. In the platinum catalyst, excellent durability is exhibited in an environment of operating a solid polymer fuel cell, and the amount of platinum eluted at the time of immersing the catalyst in a predetermined sulfuric acid solution is lower as compared to conventional platinum catalysts. The invention provides a catalyst for solid polymer fuel cells excellent in both initial activity and durability.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: June 14, 2022
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventor: Koichi Matsutani
  • Patent number: 11239473
    Abstract: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum or platinum alloy are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which the bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of a Pt5d orbit-derived spectrum which is obtained by measuring a valence band spectrum in a range of 0 eV or more and 20 eV or less in the result of subjecting the catalyst particles to X-ray photoelectron spectroscopic analysis.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: February 1, 2022
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Takeshi Kaieda, Koichi Matsutani
  • Patent number: 11145874
    Abstract: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum and a transition metal M are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which a molar ratio (Pt/M) of platinum to the transition metal M that form catalyst particles is 2.5 or more, and a ratio (SCOMSA/SBET) of a platinum specific surface area (SCOMSA) measured by a CO adsorption method to a catalyst specific surface area (SBET) measured by a BET method is 0.26 or more and 0.32 or less. The catalyst can be produced by preparing an alloy catalyst, then washing the alloy catalyst with a platinum compound solution, and additionally supplying platinum to the surfaces of catalyst particles.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: October 12, 2021
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Koichi Matsutani, Wataru Hashimoto, Takeshi Kaieda
  • Publication number: 20210143444
    Abstract: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum are supported on a carbon powder carrier. The invention provides a catalyst for solid polymer fuel cells in which the ratio of zerovalent platinum to platinum present on the surfaces of the catalyst particles is 80% or more and 100% or less. In the platinum catalyst, excellent durability is exhibited in an environment of operating a solid polymer fuel cell, and the amount of platinum eluted at the time of immersing the catalyst in a predetermined sulfuric acid solution is lower as compared to conventional platinum catalysts. The invention provides a catalyst for solid polymer fuel cells excellent in both initial activity and durability.
    Type: Application
    Filed: April 16, 2018
    Publication date: May 13, 2021
    Applicant: TANAKA KIKINZOKU KOGYO K.K.
    Inventor: Koichi MATSUTANI
  • 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
  • Publication number: 20210126264
    Abstract: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum and a transition metal M are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which a molar ratio (Pt/M) of platinum to the transition metal M that form catalyst particles is 2.5 or more, and a ratio (SCOMSA/SBET) of a platinum specific surface area (SCOMSA) measured by a CO adsorption method to a catalyst specific surface area (SBET) measured by a BET method is 0.26 or more and 0.32 or less. The catalyst can be produced by preparing an alloy catalyst, then washing the alloy catalyst with a platinum compound solution, and additionally supplying platinum to the surfaces of catalyst particles.
    Type: Application
    Filed: April 16, 2018
    Publication date: April 29, 2021
    Applicant: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Koichi MATSUTANI, Wataru HASHIMOTO, Takeshi KAIEDA
  • Patent number: 10903503
    Abstract: The present invention is a catalyst for a solid polymer fuel cell including: catalyst particles of platinum, cobalt and manganese; and a carbon powder carrier supporting the catalyst particles, wherein the component ratio (molar ratio) of the platinum, cobalt and manganese of the catalyst particles is of Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, and wherein in an X-ray diffraction analysis of the catalyst particles, the peak intensity ratio of a Co—Mn alloy appearing around 2?=27° is 0.15 or less on the basis of a main peak appearing around 2?=40°. It is particularly preferred that the catalyst have a peak ratio of a peak of a CoPt3 alloy and an MnPt3 alloy appearing around 2?=32° of 0.14 or more on the basis of a main peak.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: January 26, 2021
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Minoru Ishida, Koichi Matsutani
  • Patent number: 10892496
    Abstract: The present invention provides a catalyst for a solid polymer fuel cell, having excellent initial activity and good durability and a production method thereof. The present invention is a catalyst for a solid polymer fuel cell, including catalyst particles composed of platinum or a platinum alloy supported on a carbon powder carrier, the catalyst having sulfo groups (—SO3H) at least on the catalyst particles, and the catalyst further having a fluorine compound having a C—F bond supported at least on the catalyst particles. It is preferred in the catalyst of the present invention that sulfur content is 800 ppm or more and 5000 ppm or less based on the mass of the whole catalyst and the amount of the fluorine compound is 3 mass % or more and 24 mass % or less based on the mass of the whole catalyst.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: January 12, 2021
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Minoru Ishida, Koichi Matsutani
  • Publication number: 20200122123
    Abstract: Provided is a catalyst having a core-shell structure (which employs a core comprised of a highly electrochemically stable, relatively inexpensive material and thereby reduces the amount of platinum used, while providing a better cost/performance ratio in catalytic activity as compared to when platinum particles are used as a catalyst) for use in an oxygen reduction reaction (cathode reaction in a fuel cell), and to provide an oxygen reduction method using the catalyst. Provided is a core-shell catalyst for use for an oxygen reduction reaction, including: a core that is comprised of silver; and a shell layer that comprised of platinum, the shell layer being comprised of platinum atoms constituting a (111) plane of or a (001) plane of a face centered cubic lattice, in the shell layer, a nearest neighbor platinum-platinum interatomic distance falling within the range of from 2.81 {acute over (?)} to 2.95 {acute over (?)}.
    Type: Application
    Filed: August 29, 2017
    Publication date: April 23, 2020
    Inventors: Koichi MATSUTANI, Takeshi KAIEDA, Yasushi MASAHIRO, Wilson Agerico tan DIÑO, Bhume CHANTARAMOLEE, Ryo KISHIDA, Paulus Himawan LIM, Hiroshi NAKANISHI
  • Patent number: 10608258
    Abstract: The present invention aims to provide a catalyst that makes it possible to reduce an amount of solid electrolyte mixed and improve initial performance of a fuel cell, and also a method for producing the catalyst. The present invention relates to a catalyst for a solid polymer fuel cell, which has sulfo groups (—SO3H) on catalyst particles. In TEM-EDX analysis, a ratio (IS/IPt) of a sulfur peak intensity (IS) to a platinum peak intensity (IPt) on the catalyst particles is within a range of 0.0044 or more and 0.0090 or less. The catalyst makes it possible to reduce the amount of solid electrolyte added and also a fuel cell with excellent initial performance, and thus contributes to a practical use of a fuel cell.
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: March 31, 2020
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Minoru Ishida, Koichi Matsutani
  • Patent number: 10573901
    Abstract: [Object] Provided is a catalyst having a high catalytic activity. [Solving Means] Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst support includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, a surface area formed by the pores having a radius of less than 1 nm is equal to or larger than a surface area formed by the pores having a radius of 1 nm or more, and an average particle diameter of the catalyst metal is 2.8 nm or more.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: February 25, 2020
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Atsushi Ohma, Ken Akizuki, Yoshitaka Ono, Tetsuya Mashio, Koichi Matsutani
  • Patent number: 10562018
    Abstract: Provided is a catalyst that can exhibit high activity. The catalyst is an electrode catalyst having catalytic metals supported on a catalyst support, in which the catalytic metals include platinum and a metal component other than platinum; the electrode catalyst has mesopores having a mode radius of pore distribution of mesopores having a radius of 1 nm or more, of 1 nm or more and less than 2.5 nm; alloy microparticles of platinum and the metal component other than platinum are supported inside the mesopores; and a molar content ratio of platinum with respect to the metal component other than platinum in the alloy microparticles supported inside the mesopores is 1.0 to 10.0.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: February 18, 2020
    Assignees: NISSAN MOTOR CO., LTD., TANAKA KIKINZOKU KOGYO K.K., NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Yoshinori Suzue, Kazuki Arihara, Tetsuya Mashio, Hiroyuki Tanaka, Katsuichiro Hayakawa, Koichi Matsutani, Hitoshi Nakajima
  • Publication number: 20200052309
    Abstract: The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum or platinum alloy are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which the bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of a Pt5d orbit-derived spectrum which is obtained by measuring a valence band spectrum in a range of 0 eV or more and 20 eV or less in the result of subjecting the catalyst particles to X-ray photoelectron spectroscopic analysis.
    Type: Application
    Filed: April 16, 2018
    Publication date: February 13, 2020
    Applicant: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Takeshi KAIEDA, Koichi MATSUTANI
  • Publication number: 20200036014
    Abstract: The present invention is a catalyst for a solid polymer fuel cell including: catalyst particles of platinum, cobalt and manganese; and a carbon powder carrier supporting the catalyst particles, wherein the component ratio (molar ratio) of the platinum, cobalt and manganese of the catalyst particles is of Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, and wherein in an X-ray diffraction analysis of the catalyst particles, the peak intensity ratio of a Co—Mn alloy appearing around 2?=27° is 0.15 or less on the basis of a main peak appearing around 2?=40°. It is particularly preferred that the catalyst have a peak ratio of a peak of a CoPt3 alloy and an MnPt3 alloy appearing around 2?=32° of 0.14 or more on the basis of a main peak.
    Type: Application
    Filed: September 24, 2019
    Publication date: January 30, 2020
    Applicant: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: MINORU ISHIDA, KOICHI MATSUTANI
  • Patent number: 10497942
    Abstract: A method for forming catalyst particles, each of which has a core/shell structure, by a Cu-UPD method. Namely, a method of manufacturing a catalyst wherein catalyst particles, each of which has a core/shell structure composed of a shell layer that is formed of platinum and a core particle that is covered with the shell layer and is formed of a metal other than platinum, are supported on a carrier. This method is characterized by comprising: an electrolysis step wherein the carrier supporting the core particles is electrolyzed in an electrolytic solution containing copper ions, so that copper is precipitated on the surfaces of the core particles; and a substitution reaction step wherein a platinum compound solution is brought into contact with the core particles, on which copper has been precipitated, so that the copper on the surface of each core particle is substituted by platinum, thereby forming a shell layer that is formed of platinum.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: December 3, 2019
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Koichi Matsutani, Takeshi Kaieda, Tomohiro Akiyama
  • Publication number: 20190336956
    Abstract: Provided is a catalyst that can exhibit high activity. The catalyst is an electrode catalyst having catalytic metals supported on a catalyst support, in which the catalytic metals include platinum and a metal component other than platinum; the electrode catalyst has mesopores having a mode radius of pore distribution of mesopores having a radius of 1 nm or more, of 1 nm or more and less than 2.5 nm; alloy microparticles of platinum and the metal component other than platinum are supported inside the mesopores; and a molar content ratio of platinum with respect to the metal component other than platinum in the alloy microparticles supported inside the mesopores is 1.0 to 10.0.
    Type: Application
    Filed: April 6, 2017
    Publication date: November 7, 2019
    Applicants: NISSAN MOTOR CO., LTD., TANAKA KIKINZOKU KOGYO K.K., NIPPON STEEL CHEMICAL & MATERIAL CO., LTD.
    Inventors: Yoshinori SUZUE, Kazuki ARIHARA, Tetsuya MASHIO, Hiroyuki TANAKA, Katsuichiro HAYAKAWA, Koichi MATSUTANI, Hitoshi NAKAJIMA
  • Patent number: 10454113
    Abstract: The present invention is a catalyst for a solid polymer fuel cell including: catalyst particles of platinum, cobalt and manganese; and a carbon powder carrier supporting the catalyst particles, wherein the component ratio (molar ratio) of the platinum, cobalt and manganese of the catalyst particles is of Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, and wherein in an X-ray diffraction analysis of the catalyst particles, the peak intensity ratio of a Co—Mn alloy appearing around 2?=27° is 0.15 or less on the basis of a main peak appearing around 2?=40°. It is particularly preferred that the catalyst have a peak ratio of a peak of a CoPt3 alloy and an MnPt3 alloy appearing around 2?=32° of 0.14 or more on the basis of a main peak.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: October 22, 2019
    Assignee: TANAKA KIKINZOKU KOGYO K.K.
    Inventors: Minoru Ishida, Koichi Matsutani
  • Publication number: 20190296363
    Abstract: Provided are (i) a catalyst that has a core-shell structure and is highly active in an oxygen reduction reaction, which is a cathode reaction of a fuel cell, and (ii) a reaction acceleration method in which the catalyst is used. A core-shell catalyst for accelerating an oxygen reduction reaction, contains: silver or palladium as a core material; and platinum as a shell material, the core-shell catalyst having, on a surface thereof, a (110) surface of a face centered cubic lattice.
    Type: Application
    Filed: June 14, 2019
    Publication date: September 26, 2019
    Inventors: Koichi MATSUTANI, Takeshi KAIEDA, Yasushi MASAHIRO, Hideaki KASAI, Hiroshi NAKANISHI, Koji SHIMIZU
  • 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
  • Publication number: 20180138518
    Abstract: Provided are (i) a catalyst that has a core-shell structure and is highly active in an oxygen reduction reaction, which is a cathode reaction of a fuel cell, and (ii) a reaction acceleration method in which the catalyst is used. A core-shell catalyst for accelerating an oxygen reduction reaction, contains: silver or palladium as a core material; and platinum as a shell material, the core-shell catalyst having, on a surface thereof, a (110) surface of a face centered cubic lattice.
    Type: Application
    Filed: June 17, 2016
    Publication date: May 17, 2018
    Applicants: TANAKA KIKINZOKU KOGYO K.K., OSAKA UNIVERSITY
    Inventors: Koichi MATSUTANI, Takeshi KAIEDA, Yasushi MASAHIRO, Hideaki KASAI, Hiroshi NAKANISHI, Koji SHIMIZU