Patents by Inventor Ryota Kitagawa

Ryota Kitagawa 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).

  • ELECTROCHEMICAL REACTION DEVICE AND ELECTROCHEMICAL REACTION METHOD
    Publication number: 20180274113
    Abstract: An electrochemical reaction device of an embodiment includes: a reaction tank which includes a first storage storing a first electrolytic solution containing carbon dioxide, and a second storage storing a second electrolytic solution containing water; a reduction electrode which is disposed at the first storage, an oxidation electrode which is disposed at the second storage; a counter electrode which is used for potential sweep using the reduction electrode as a working electrode; a first power supply which is electrically connected to the reduction electrode and the oxidation electrode, to generate a reduction reaction and an oxidation reaction; and a second power supply which is electrically connected to the reduction electrode and the counter electrode, to sweep a potential while setting an oxidation potential of the reduction electrode or less as an upper limit potential.
    Type: Application
    Filed: September 8, 2017
    Publication date: September 27, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryota KITAGAWA, Yoshitsune SUGANO, Masakazu YAMAGIWA, Jun TAMURA, Yuki KUDO, Akihiko ONO, Satoshi MIKOSHIBA
  • CARBON DIOXIDE ELECTROLYTIC DEVICE AND CARBON DIOXIDE ELECTROLYTIC METHOD
    Publication number: 20180274109
    Abstract: A carbon dioxide electrolytic device of an embodiment includes: an electrolysis cell including a cathode, an anode, a carbon dioxide supply unit, an electrolytic solution supply unit, and a separator; a power supply; a reaction control unit which causes a reduction reaction and an oxidation reaction by passing an electric current from the power supply to the anode and the cathode; a refresh material supply unit including a gas supply unit which supplies a gaseous substance to at least one of the anode and the cathode; and a refresh control unit which stops supply of the current from the power supply and supply of carbon dioxide and an electrolytic solution, and operates the refresh material supply unit, based on request criteria of a cell output of the electrolysis cell.
    Type: Application
    Filed: September 13, 2017
    Publication date: September 27, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuki Kudo, Akihiko Ono, Ryota Kitagawa, Masakazu Yamagiwa, Eishi Tsutsumi, Yoshitsune Sugano, Jun Tamura, Satoshi Mikoshiba
  • ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20180274114
    Abstract: An electrochemical reaction device comprises: an anode to oxidize water; an electrolytic solution flow path facing on the anode and through which an electrolytic solution containing the water flows; a cathode including: a porous conductive layer having first and second surfaces; and a reduction catalyst layer having a third surface disposed on the first surface and containing a reduction catalyst to reduce carbon dioxide; a separator between the anode and the cathode; a power supply connected to the anode and the cathode; and a flow path plate including: a fourth surface on the second surface; and a flow path facing on the second surface and through which the carbon dioxide flows. A ratio of an area of an overlap of the second surface and the flow path to an area of the second surface is 0.5 or more and 0.85 or less.
    Type: Application
    Filed: September 1, 2017
    Publication date: September 27, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko ONO, Satoshi MIKOSHIBA, Yuki KUDO, Masakazu YAMAGIWA, Jun TAMURA, Yoshitsune SUGANO, Ryota KITAGAWA, Eishi TSUTSUMI, Asahi MOTOSHIGE, Takayuki TSUKAGOSHI
  • CARBON DIOXIDE ELECTROLYTIC DEVICE
    Publication number: 20180265440
    Abstract: A carbon dioxide electrolytic device of an embodiment includes: an anode part including an anode which oxidizes water or hydroxide ions to produce oxygen; a cathode part including a cathode which reduces carbon dioxide to produce a carbon compound, a cathode solution flow path which supplies a cathode solution to the cathode, and a gas flow path which supplies carbon dioxide to the cathode; a separator which separates the anode part and the cathode part; and a differential pressure control unit which controls a differential pressure between a pressure of the cathode solution and a pressure of the carbon dioxide so as to adjust a production amount of the carbon dioxide produced by a reduction reaction in the cathode part.
    Type: Application
    Filed: September 7, 2017
    Publication date: September 20, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yuki KUDO, Akihiko Ono, Masakazu Yamagiwa, Eishi Tsutsumi, Yoshitsune Sugano, Ryota Kitagawa, Jun Tamura, Satoshi Mikoshiba
  • CHEMICAL REACTION SYSTEM
    Publication number: 20180264429
    Abstract: A chemical reaction system includes: an electrochemical reaction device including a reduction part to store an electrolytic solution containing carbon dioxide and to reduce the carbon dioxide and thus generate a first product in the electrolytic solution; a reactor including a reaction chamber to store a reaction solution containing the electrolytic solution from the electrochemical reaction device and to chemically react a reactant containing the first product in the reaction solution and thus generate a second product in the reaction solution; and a separation and recovery device including a separation chamber to store a product solution containing the reaction solution from the reactor and to extract and recover at least a part of the second product from the product solution.
    Type: Application
    Filed: September 5, 2017
    Publication date: September 20, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshitsune SUGANO, Jun Tamura, Akihiko Ono, Ryota Kitagawa, Yuki Kudo, Masakazu Yamagiwa, Satoshi Mikoshiba
  • ELECTROCHEMICAL REACTION DEVICE AND METHOD OF MANUFACTURING ANODE FOR ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20180265995
    Abstract: An anode of an electrochemical reaction device includes: a stack having a conductive substrate and an oxide layer on the conductive substrate, the conductive substrate containing nickel or iron, and the oxide layer containing a nickel oxide or an iron oxide; and an oxidation catalyst layer disposed on the stack and containing an oxidation catalyst to oxidize water. A Raman spectrum of the oxide layer measured by a Raman spectroscopic analysis has a peak at a Raman shift of 500 cm?1 or more and 600 cm?1 or less or at a Raman shift of 1270 cm?1 or more and 1370 cm?1 or less.
    Type: Application
    Filed: September 5, 2017
    Publication date: September 20, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Asahi MOTOSHIGE, Ryota Kitagawa, Yoshitsune Sugano, Akihiko Ono, Satoshi Mikoshiba, Yuki Kudo, Jun Tamura, Masakazu Yamagiwa, Eishi Tsutsumi, Takayuki Tsukagoshi
  • ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20180265994
    Abstract: A cathode part of an electrochemical reaction device comprises a conductor, a porous body, a reduction catalyst, an electrolytic solution flow path, a first flow path, and a second flow path. The conductor has a conductive surface. The porous body includes a first surface, a second surface, a first porous portion, and a second porous portion. The first surface is in contact with the conductive surface. A contact angle between an inner wall of the second porous portion and water is higher than a contact angle between an inner wall of the first porous portion and the water. The reduction catalyst is supported on the second surface to reduce carbon dioxide. The electrolytic solution flow path faces the reduction catalyst. The first flow path faces the first porous portion. The second flow path faces the second porous portion.
    Type: Application
    Filed: September 1, 2017
    Publication date: September 20, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masakazu YAMAGIWA, Yuki KUDO, Akihiko ONO, Satoshi MIKOSHIBA, Jun TAMURA, Ryota KITAGAWA, Yoshitsune GANO, Eishi TSUTSUMI, Asahi MOTOSHIGE, Takayuki TSUKAGOSHI
  • Photo-electrochemical cell, manufacturing method of photo-electrochemical cell, and photo-electrochemical reaction device
    Patent number: 10062520
    Abstract: A photo-electrochemical cell of an embodiment includes: a first electrode which has a transparent conductive film provided on a first surface of a photoelectric conversion layer; a first catalyst layer provided on the first electrode; a second electrode provided on a second surface of the photoelectric conversion layer; and a second catalyst layer provided on the second electrode. The first catalyst layer has a plurality of catalyst parts disposed on the first electrode and a transparent dielectric part disposed in a gap between the plurality of catalyst parts.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 28, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryota Kitagawa, Yoshitsune Sugano, Chingchun Huang, Eishi Tsutsumi, Jun Tamura, Akihiko Ono, Yuki Kudo, Satoshi Mikoshiba
  • REDUCTION CATALYST, AND CHEMICAL REACTOR, REDUCTION METHOD AND REDUCTION PRODUCT-PRODUCING SYSTEM EMPLOYING THE CATALYST
    Publication number: 20180209053
    Abstract: The present embodiments provide a reduction catalyst realizing high reaction efficiency and a reduction reactor employing the catalyst. The reduction catalyst of the embodiment comprises an electric conductor and an organic layer having organic modifying groups placed on the surface of the conductor. The organic modifying groups have an aromatic ring having two or more nitrogen atoms. The reduction catalyst is used in a reduction reactor, and the reactor is also provided.
    Type: Application
    Filed: August 30, 2017
    Publication date: July 26, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Jun TAMURA, Satoshi Mikoshiba, Yuki Kudo, Akihiko Ono, Ryota Kitagawa, Masakazu Yamagiwa, Yoshitsune Sugano
  • ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20180119294
    Abstract: An electrochemical reaction device in an embodiment includes: a reaction vessel including a first accommodating part to accommodate a first electrolytic solution containing carbon dioxide, and a second accommodating part to accommodate a second electrolytic solution containing water; a reduction electrode disposed in the first accommodating part; an oxidation electrode disposed in the second accommodating part; a power supply electrode connected to the reduction electrode and the oxidation electrode; and a third accommodating part to mix a first gas component produced in the first accommodating part with the first electrolytic solution after the first gas component is produced.
    Type: Application
    Filed: September 13, 2017
    Publication date: May 3, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryota Kitagawa, Satoshi Mikoshiba, Akihiko Ono, Yuki Kudo, Jun Tamura, Eishi Tsutsumi, Yoshitsune Sugano, Asahi Motoshige, Masakazu Yamagiwa, Arisa Yamada
  • REDUCTION CATALYST, REDUCTION REACTOR AND REDUCTION METHOD
    Publication number: 20180073154
    Abstract: The present embodiments provide: a reduction catalyst having high reaction efficiency, a reduction reactor including the same and a reduction method using the same. This catalyst includes a conductor and an organic layer comprises organic modifying groups capable of binding to the surface of the conductor, wherein the organic modifying groups contain a nitrogen-containing heterocycle.
    Type: Application
    Filed: February 28, 2017
    Publication date: March 15, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Arisa YAMADA, Satoshi MIKOSHIBA, Akihiko ONO, Yuki KUDO, Jun TAMURA, Ryota KITAGAWA, Eishi TSUTSUMI, Masakazu YAMAGIWA, Yoshitsune SUGANO, Asahi MOTOSHIGE, Tomohito IDE
  • OPTICALLY TRANSPARENT OXYGEN GENERATION CATALYST, PRODUCTION METHOD THEREOF, AND CHEMICAL REACTOR UTILIZING THE SAME
    Publication number: 20180073153
    Abstract: The present embodiments provide: a catalyst having excellent optical transparency, catalytic activity and durability; and a method of producing the same. This catalyst comprises a graphene oxide layer and a nickel-iron layered double hydroxide layer supported on the surface of the graphene oxide layer. The graphene oxide layer has an average thickness of 0.33 to 4 nm. The catalyst can be produced by arranging graphene oxide on a substrate by a coating method and then allowing NiFe-LDH to be supported thereon.
    Type: Application
    Filed: March 3, 2017
    Publication date: March 15, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Arisa YAMADA, Satoshi MIKOSHIBA, Akihiko ONO, Yuki KUDO, Jun TAMURA, Ryota KITAGAWA, Eishi TSUTSUMI, Masakazu YAMAGIWA, Yoshitsune SUGANO, Asahi MOTOSHIGE
  • REDUCTION CATALYST AND CHEMICAL REACTOR
    Publication number: 20170369405
    Abstract: According to one embodiment, a reduction catalyst includes a current collector including a metal layer; and organic molecules including a quaternary nitrogen cation, which are bonded to the metal layer. The organic molecules are represented by any of the following general formulae I to V.
    Type: Application
    Filed: September 7, 2017
    Publication date: December 28, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Jun TAMURA, Satoshi Mikoshiba, Yuki Kudo, Akihiko Ono, Ryota Kitagawa, Masakazu Yamagiwa, Eishi Tsutsumi, Yoshitsune Sugano
  • PHOTOCHEMICAL REACTION SYSTEM
    Publication number: 20170370012
    Abstract: According to one embodiment, a photochemical reaction system comprises a CO2 production unit, a CO2 absorption unit, and a CO2 reduction unit. The CO2 reduction unit comprises a laminated body and an ion transfer pathway. The laminated body comprises an oxidation catalyst layer producing O2 and H+ by oxidizing H2O, a reduction catalyst layer producing carbon compounds by reducing CO2 absorbed by the CO2 absorption unit, and a semiconductor layer formed between the oxidation catalyst layer and the reduction catalyst layer and develops charge separation with light energy. The ion transfer pathways make ions move between the oxidation catalyst layer side and the reduction catalyst layer side.
    Type: Application
    Filed: September 7, 2017
    Publication date: December 28, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko ONO, Satoshi MIKOSHIBA, Yuki KUDO, Jun TAMURA, Ryota KITAGAWA, Chingchun HUANG
  • PHOTOCHEMICAL REACTION DEVICE
    Publication number: 20170268115
    Abstract: According to one embodiment, a photochemical reaction device comprises a laminated body and an ion transfer pathway. A laminated body comprises an oxidation catalyst layer for producing oxygen and protons by oxidizing water a reduction catalyst layer for producing carbon compounds by reducing carbon dioxide and a semiconductor layer formed between the oxidation catalyst layer and the reduction catalyst layer and developing charge separation with light energy. An ion transfer pathway moves ions between the oxidation catalyst layer side and the reduction catalyst layer side.
    Type: Application
    Filed: June 7, 2017
    Publication date: September 21, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko ONO, Satoshi MIKOSHIBA, Ryota KITAGAWA, Jun TAMURA, Yuki KUDO, Chingchun HUANG
  • ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20170271089
    Abstract: An electrochemical reaction device includes: an electrolytic solution tank including a first storage part storing a first electrolytic solution and a second storage part storing a second electrolytic solution; a reduction electrode immersed in the first electrolytic solution; and an oxidation electrode immersed in the second electrolytic solution. The second electrolytic solution contains a substance to be oxidized. The first electrolytic solution has a first liquid phase containing water and a second liquid phase containing an organic solvent and being in contact with the first liquid phase. At least one liquid phase of the first liquid phase or the second liquid phase contains a substance to be reduced and is in contact with the reduction electrode.
    Type: Application
    Filed: September 9, 2016
    Publication date: September 21, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko ONO, Satoshi MIKOSHIBA, Ryota KITAGAWA, Jun TAMURA, Yoshitsune SUGANO
  • ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20170268118
    Abstract: An electrochemical reaction device, includes: an electrolytic solution tank including a first storage part to store a first electrolytic solution containing carbon dioxide, and a second storage part to store a second electrolytic solution containing water; a reduction electrode disposed in the first storing part; an oxidation electrode disposed in the second storing part; a porous body disposed in the first storing part; and a flow path connecting the porous body and an outside of the electrolytic solution tank to supply gas containing carbon dioxide to the porous body.
    Type: Application
    Filed: September 8, 2016
    Publication date: September 21, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Akihiko ONO, Satoshi MIKOSHIBA, Ryota KITAGAWA, Jun TAMURA, Yoshitsune SUGANO, Arisa YAMADA, Yuki KUDO
  • Photochemical reaction system
    Patent number: 9758882
    Abstract: According to one embodiment, a photochemical reaction system comprises a CO2 production unit, a CO2 absorption unit, and a CO2 reduction unit. The CO2 reduction unit comprises a laminated body and an ion transfer pathway. The laminated body comprises an oxidation catalyst layer producing O2 and H+ by oxidizing H2O, a reduction catalyst layer producing carbon compounds by reducing CO2 absorbed by the CO2 absorption unit, and a semiconductor layer formed between the oxidation catalyst layer and the reduction catalyst layer and develops charge separation with light energy. The ion transfer pathways make ions move between the oxidation catalyst layer side and the reduction catalyst layer side.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: September 12, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akihiko Ono, Satoshi Mikoshiba, Yuki Kudo, Jun Tamura, Ryota Kitagawa, Chingchun Huang
  • ELECTROCHEMICAL REACTION DEVICE AND ELECTROCHEMICAL REACTION METHOD
    Publication number: 20170247804
    Abstract: A electrochemical reaction device of an embodiment includes: an electrolytic tank storing an electrolytic solution containing water; a fine bubble supply part which supplies fine bubbles containing carbon dioxide into the electrolytic solution; a reduction electrode which is immersed in the electrolytic solution and reduces the carbon dioxide to generate a carbon compound; an oxidation electrode which is immersed in the electrolytic solution and oxidizes the water to generate oxygen; and a photoelectric conversion body electrically connected to the reduction electrode and the oxidation electrode. The fine bubbles have a floating velocity of 10 mm/s or less in the electrolytic solution under an atmospheric pressure and 20° C. condition.
    Type: Application
    Filed: September 13, 2016
    Publication date: August 31, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Arisa YAMADA, Satoshi Mikoshiba, Akihiko Ono, Yuki Kudo, Jun Tamura, Ryota Kitagawa, Eishi Tsutsumi, Masakazu Yamagiwa, Yoshitsune Sugano, Asahi Motoshige
  • ELECTROCHEMICAL REACTION DEVICE
    Publication number: 20170247802
    Abstract: An electrochemical reaction device includes: an electrolytic solution tank including a first storage part to store a first electrolytic solution, and a second storage part to store a second electrolytic solution; a reduction electrode disposed in the first storage part and having a first surface; an oxidation electrode disposed in the second storage part and having a second surface; and a generator connected to the reduction and oxidation electrodes. A region in the first storage part between the first surface and an inner wall of the first storage part is an electrolytic solution flow path. The electrolytic solution flow path has a maximum part and a minimum part.
    Type: Application
    Filed: September 8, 2016
    Publication date: August 31, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Eishi Tsutsumi, Ryota Kitagawa, Akihiko Ono, Yuki Kudo, Jun Tamura, Yoshitsune Sugano, Masakazu Yamagiwa, Arisa Yamada, Asahi Motoshige, Satoshi Mikoshiba