Patents by Inventor Shigenori Mitsushima
Shigenori Mitsushima 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).
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Publication number: 20200040471Abstract: The present invention provides an oxide-dispersed metal porous body including a porous metal framework, and oxide particles carried in the metal framework.Type: ApplicationFiled: April 23, 2018Publication date: February 6, 2020Applicants: Sumitomo Electric Industries, Ltd., National University Corporation YOKOHAMA National UniversityInventors: Kazuki OKUNO, Masatoshi MAJIMA, Takahiro HIGASHINO, Hiromasa TAWARAYAMA, Shigenori MITSUSHIMA
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Publication number: 20190352786Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.Type: ApplicationFiled: October 18, 2017Publication date: November 21, 2019Applicants: National University Corporation YOKOHAMA National University, DE NORA PERMELEC LTDInventors: Shigenori MITSUSHIMA, Kensaku NAGASAWA, Yoshinori NISHIKI, Akihiro KATO, Setsuro OGATA, Awaludin ZAENAL, Akiyoshi MANABE, Koji MATSUOKA, Yasushi SATO
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Publication number: 20190264340Abstract: An organic hydride production apparatus includes: an electrolyte membrane having proton conductivity; a cathode that includes a cathode catalyst layer used to hydrogenate a hydrogenation target substance using protons to produce an organic hydride and also includes a cathode chamber; an anode that includes an anode catalyst layer used to oxidize water to produce protons and also includes an anode chamber; and a gas introduction unit that introduces, into the anolyte at a certain position, a certain gas used to remove at least one of the hydrogenation target substance and the organic hydride that have passed through the electrolyte membrane and been mixed into the anolyte.Type: ApplicationFiled: May 15, 2019Publication date: August 29, 2019Applicants: National University Corporation YOKOHAMA National University, DE NORA PERMELEC LTDInventors: Shigenori MITSUSHIMA, Kensaku NAGASAWA, Yoshinori NISHIKI, Akihiro KATO, Setsuro OGATA, Awaludin ZAENAL, Akiyoshi MANABE, Koji MATSUOKA, Yasushi SATO
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Publication number: 20190226102Abstract: Provided is a method capable of producing, in a simple and low-cost manner, an electrolysis electrode which can be used in alkaline water electrolysis and has superior durability against output variation. The method for producing an anode for alkaline water electrolysis includes: a step of dissolving lithium nitrate and a nickel carboxylate in water to prepare an aqueous solution containing lithium ions and nickel ions, a step of applying the aqueous solution to the surface of a conductive substrate having at least the surface composed of nickel or a nickel-based alloy, and a step of subjecting the conductive substrate to which the aqueous solution has been applied to a heat treatment at a temperature within a range from at least 450° C. to not more than 600° C., thereby forming a catalyst layer composed of a lithium-containing nickel oxide on the conductive substrate.Type: ApplicationFiled: September 11, 2017Publication date: July 25, 2019Inventors: Shigenori MITSUSHIMA, Sho FUJITA, Ikuo NAGASHIMA, Yoshinori NISHIKI, Akiyoshi MANABE, Akihiro KATO
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Patent number: 10202698Abstract: A device for producing an organic hydride 10 of an aspect of the present invention has an electrochemical cell provided with an anode 12 on a surface of an electrolyte membrane 11 and a cathode including a cathode catalyst layer 13 and a cathode diffusion layer 14 on another surface of the electrolyte membrane 11. A gap is provided between the anode 12 and the electrolyte membrane 11. The anode 12 has a network structure with an aperture ratio of 30 to 70%, and has an electrical supply supporting material formed of an electronic conductor and the electrode catalyst held by the electrical supply supporting material.Type: GrantFiled: March 24, 2015Date of Patent: February 12, 2019Assignees: Yokohama National University, DE NORA PERMELEC LTDInventors: Shigenori Mitsushima, Yasutomo Takakuwa, Yoshinori Nishiki, Akihiro Kato, Akiyoshi Manabe, Yasushi Sato, Kota Miyoshi, Kojiro Nakagawa, Shinji Oshima
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Patent number: 10050282Abstract: The present invention provides a novel oxygen reduction catalyst having a good stability and a high oxygen reduction performance. The oxygen reduction catalyst includes: a conductive oxide; and an oxide(s), having oxygen holes and provided at least on the surface of the conductive oxide, of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta.Type: GrantFiled: February 27, 2015Date of Patent: August 14, 2018Assignee: National University Corporation Yokohama National UniversityInventors: Kenichiro Ota, Akimitsu Ishihara, Shigenori Mitsushima, Makoto Hamazaki
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Publication number: 20170321331Abstract: An anode for oxygen evolution that operates at a small overpotential and in a stable manner, and can be used favorably in an organic chemical hydride electrolytic synthesis apparatus. An anode 10 for oxygen evolution that evolves oxygen in a sulfuric acid aqueous solution containing a substance to be hydrogenated dissolved at a concentration higher than 1 mg/L, wherein an anode substrate 10a is composed of a valve metal, and an anode catalyst layer 10b containing at least one oxide, nitride or carbide of iridium, and at least one oxide, nitride or carbide of at least one metal selected from the group consisting of elements belonging to groups 4, 5 and 13 of the periodic table is formed on the surface of the anode substrate 10a.Type: ApplicationFiled: November 19, 2015Publication date: November 9, 2017Applicants: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.Inventors: Shigenori MITSUSHIMA, Yasutomo TAKAKUWA, Awaludin ZAENAL, Akihiro KATO
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Publication number: 20170314145Abstract: An organic hydride production apparatus that enables the reduction reaction at the cathode of an organic compound having an unsaturated bond to proceed at high current efficiency and at a low electric power consumption rate, and a method for producing an organic hydride that uses this production apparatus.Type: ApplicationFiled: November 19, 2015Publication date: November 2, 2017Applicants: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, DE NORA PERMELEC LTD.Inventors: Shigenori MITSUSHIMA, Yasutomo TAKAKUWA, Yoshinori NISHIKI, Akihiro KATO, Akiyoshi MANABE
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Publication number: 20170292198Abstract: To provide an electrolysis cell for producing an organic chemical hydride capable of advancing a reduction reaction in a cathode of an organic compound having an unsaturated bond with high current efficiency and a small electric power consumption unit.Type: ApplicationFiled: September 18, 2015Publication date: October 12, 2017Applicants: NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY, De Nora Permelec Ltd.Inventors: Shigenori MITSUSHIMA, Yasutomo TAKAKUWA, Yoshinori NISHIKI, Akihiro KATO, Akiyoshi MANABE
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Patent number: 9748580Abstract: Provided is an oxygen reduction catalyst having a high oxygen reduction performance. An oxygen reduction catalyst according to the present embodiment includes a transition metal oxide to which an oxygen defect is introduced, and a layer that is provided on the transition metal oxide and that contains an electron conductive substance. A method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition metal carbonitride as a starting material in an oxygen-containing mixed gas. In addition, a method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition-metal phthalocyanine and a carbon fiber powder as starting materials in an oxygen-containing mixed gas.Type: GrantFiled: March 21, 2012Date of Patent: August 29, 2017Assignee: Yokohama National UniversityInventors: Ken-ichiro Ota, Akimitsu Isihara, Shigenori Mitsushima, Koichi Matsuzawa, Keisuke Ukita, Hideto Imai, Masashi Matsumoto, Takashi Miyazaki
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Publication number: 20170130344Abstract: A device for producing an organic hydride 10 of an aspect of the present invention has an electrochemical cell provided with an anode 12 on a surface of an electrolyte membrane 11 and a cathode including a cathode catalyst layer 13 and a cathode diffusion layer 14 on another surface of the electrolyte membrane 11. A gap is provided between the anode 12 and the electrolyte membrane 11. The anode 12 has a network structure with an aperture ratio of 30 to 70%, and has an electrical supply supporting material formed of an electronic conductor and the electrode catalyst held by the electrical supply supporting material.Type: ApplicationFiled: March 24, 2015Publication date: May 11, 2017Inventors: Shigenori MITSUSHIMA, Yasutomo TAKAKUWA, Yoshinori NISHIKI, Akihiro KATO, Akiyoshi MANABE, Yasushi SATO, Kota MIYOSHI, Kojiro NAKAGAWA, Shinji OSHIMA
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Publication number: 20170098830Abstract: The present invention provides a novel oxygen reduction catalyst having a good stability and a high oxygen reduction performance. The oxygen reduction catalyst includes: a conductive oxide; and an oxide(s), having oxygen holes and provided at least on the surface of the conductive oxide, of at least one or more transition metals selected from the group consisting of Ti, Zr, Nb and Ta.Type: ApplicationFiled: February 27, 2015Publication date: April 6, 2017Applicant: National University Corporation Yokohama National UniversityInventors: Kenichiro Ota, Akimitsu Ishihara, Shigenori Mitsushima, Makoto Hamazaki
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Publication number: 20160237578Abstract: An anode for alkaline water electrolysis includes a conductive substrate having at least a surface made of nickel or a nickel-base alloy and a lithium-containing nickel oxide catalytic layer formed on a surface of the substrate. The molar ratio (Li/Ni) of lithium and nickel in the catalytic layer is in the range of 0.005 to 0.15.Type: ApplicationFiled: October 29, 2014Publication date: August 18, 2016Inventors: Hiroki ICHIKAWA, Shigenori MITSUSHIMA, Ikuo NAGASHIMA, Yoshio SUNADA, Akihiro KATO, Liang YIN, Akiyoshi MANABE, Yoshinoñ NISHIKI
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Publication number: 20140011102Abstract: Provided is an oxygen reduction catalyst having a high oxygen reduction performance. An oxygen reduction catalyst according to the present embodiment includes a transition metal oxide to which an oxygen defect is introduced, and a layer that is provided on the transition metal oxide and that contains an electron conductive substance. A method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition metal carbonitride as a starting material in an oxygen-containing mixed gas. In addition, a method for producing an oxygen reduction catalyst according to the present embodiment includes heating a transition-metal phthalocyanine and a carbon fiber powder as starting materials in an oxygen-containing mixed gas.Type: ApplicationFiled: March 21, 2012Publication date: January 9, 2014Applicant: YOKOHAMA NATIONAL UNIVERSITYInventors: Ken-ichiro Ota, Akimitsu Isihara, Shigenori Mitsushima, Koichi Matsuzawa, Keisuke Ukita, Hideto Imai, Masashi Matsumoto, Takashi Miyazaki
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Patent number: 7919215Abstract: A corrosion-resistant electrode catalyst for oxygen reduction includes a main catalyst composed of at least one transition metal oxide selected from oxygen-deficient ZrO2, Ta2O5, Nb2O5, TiO2, V2O5, MoO3, and WO3 and a co-catalyst composed of gold. The electrode catalyst is used in contact with an acidic electrolyte at a potential at least 0.4 V higher than the reversible hydrogen electrode potential. The catalyst may be used, for example, in such a form that the transition metal oxide in the form of fine particles and gold in the form of fine particles, or fine particles including fine gold particles coated with the transition metal oxide are dispersed on a catalyst carrier which is an electron conductive powder. This electrode catalyst is suitable as an electrode catalyst for an electrochemical system using an acidic electrolyte in the fields of water electrolysis, inorganic/organic electrolysis, fuel cells, etc.Type: GrantFiled: August 18, 2005Date of Patent: April 5, 2011Assignee: Japan Science and Technology AgencyInventors: Kenichiro Ota, Nobuyuki Kamiya, Shigenori Mitsushima, Akimitsu Ishihara, Liu Yan
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Publication number: 20100279202Abstract: An electrode catalyst for an oxygen reduction electrode for use in a cathode of a polymer electrolyte fuel cell, produced by oxidizing ZrCN, wherein ZrCN and ZrO2 are detected by X-ray diffraction of the electrode catalyst, the electrode catalyst has an ionization potential of 5.0 to 6.0 eV, and ZrO2 is detected by X-ray photoelectron spectroscopy of the electrode catalyst.Type: ApplicationFiled: October 30, 2008Publication date: November 4, 2010Inventors: Ken-ichiro Ota, Shigenori Mitsushima, Akimitsu Ishihara, Yoshiro Ohgi
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Patent number: 7670712Abstract: An electrode catalyst that maintains catalytic activity under conditions of an electrode potential as high as 0.4 V or above and exhibits improved stability. The metal oxynitride electrode catalyst is composed of an oxynitride containing at least one transition metal element selected from the group consisting of La, Ta, Nb, Ti, and Zr, the metal oxynitride electrode catalyst being used at a potential of 0.4 V or higher relative to the reversible hydrogen electrode potential in an acidic electrolyte. The metal oxynitride electrode catalyst is useful as an electrode catalyst for electrochemical systems used in acidic electrolytes in the fields of water electrolysis, organic electrolysis, fuel cells, etc.Type: GrantFiled: November 30, 2004Date of Patent: March 2, 2010Assignee: Japan Science and Technology AgencyInventors: Kenichiro Ota, Nobuyuki Kamiya, Shigenori Mitsushima, Akimitsu Ishihara, Kazunari Doumen, Michikazu Hara
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Publication number: 20070259267Abstract: A corrosion-resistant electrode catalyst for oxygen reduction includes a main catalyst composed of at least one transition metal oxide selected from oxygen-deficient ZrO2, Ta2O5, Nb2O5, TiO2, V2O5, MoO3, and WO3 and a co-catalyst composed of gold. The electrode catalyst is used in contact with an acidic electrolyte at a potential at least 0.4 V higher than the reversible hydrogen electrode potential. The catalyst may be used, for example, in such a form that the transition metal oxide in the form of fine particles and gold in the form of fine particles, or fine particles including fine gold particles coated with the transition metal oxide are dispersed on a catalyst carrier which is an electron conductive powder. This electrode catalyst is suitable as an electrode catalyst for an electrochemical system using an acidic electrolyte in the fields of water electrolysis, inorganic/organic electrolysis, fuel cells, etc.Type: ApplicationFiled: August 18, 2005Publication date: November 8, 2007Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Kenichiro Ota, Nobuyuki Kamiya, Shigenori Mitsushima, Akimitsu Ishihara, Liu Yan
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Publication number: 20070128884Abstract: [Problems] Carbides and many other non-platinum-based compounds are activated and dissolved and cannot be stably present in an acidic electrolyte under conditions of an electrode potential as high as 0.4 V or above, and thus, the application range of these compounds as an electrode catalyst is limited to low electrode potentials. There has been need for development of an electrode catalyst that maintains catalytic activity under these conditions and exhibits improved stability. [Means for Solving Problems] To provide a metal oxynitride electrode catalyst composed of an oxynitride containing at least one transition metal element selected from the group consisting of La, Ta, Nb, Ti, and Zr, the metal oxynitride electrode catalyst being used at a potential of 0.4 V or higher relative to the reversible hydrogen electrode potential in an acidic electrolyte.Type: ApplicationFiled: November 30, 2004Publication date: June 7, 2007Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Kenichiro Ota, Nobuyuki Kamiya, Shigenori Mitsushima, Akimitsu Ishihara, Kazunari Doumen, Michikazu Hara