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公开(公告)号：US11434575B2
公开(公告)日：2022-09-06
申请号：US16394869
申请日：2019-04-25
发明人： Yuki Kudo , Satoshi Mikoshiba , Akihiko Ono , Jun Tamura , Ryota Kitagawa , Masakazu Yamagiwa , Yoshitsune Sugano
摘要： A reduction electrode of an embodiment includes a metal base material and a plurality of metal nanowires provided on the metal base material. The plurality of metal nanowires include metal nanowires whose average height of contour curve of surface is 20 nm or less for 50% or more in a number ratio. The plurality of metal nanowires are formed by reducing a plurality of metal oxides each having a nanowire shape formed on the metal base material by an electrochemical reduction method. A reduction process of the metal oxides includes a first process of passing a current under a constant current condition where an absolute value is 5 mA/cm2 or more through the plurality of metal oxides, and a second process of passing a current under a constant potential condition through the plurality of metal oxides.
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公开(公告)号：US11098409B2
公开(公告)日：2021-08-24
申请号：US16560082
申请日：2019-09-04
发明人： Yuki Kudo , Akihiko Ono , Masakazu Yamagiwa , Ryota Kitagawa , Jun Tamura , Yoshitsune Sugano , Asahi Motoshige , Satoshi Mikoshiba
摘要： An electrolytic cell for carbon dioxide of an embodiment includes: an anode part including an anode to oxidize water or a hydroxide ion and thus produce oxygen and an anode solution flow path to supply an anode solution to the anode; a cathode part including a cathode to reduce carbon dioxide and thus produce a carbon compound, a cathode solution flow path to supply a cathode solution to the cathode, and a liquid passing member disposed between the cathode and the cathode solution flow path and having a pore allowing the cathode solution to pass through while holding the cathode solution; and a separator to separate the anode part and the cathode part from each other.
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公开(公告)号：US20200087233A1
公开(公告)日：2020-03-19
申请号：US16288145
申请日：2019-02-28
发明人： Akihiko ONO , Yuki Kudo , Ryota Kitagawa , Masakazu Yamagiwa , Jun Tamura , Satoshi Mikoshiba , Yoshitsune Sugano , Asahi Motoshige
IPC分类号： C07C29/153 , C25B1/10 , C25B3/04 , G01N33/00 , G01N27/30
摘要： A carbon dioxide electrolytic device includes: an electrolysis cell including a cathode, an anode, cathode and anode flow paths, and a separator; a carbon dioxide source to supply carbon dioxide to the cathode flow path; a solution source to supply an electrolytic solution containing water to the anode flow path; at least one sensor to acquire at least one data of a data indicating a discharge amount per unit time of a liquid containing water to be discharged from at least one flow path and a data indicating a concentration of at least one ion in the liquid; a refresh material source including a gas source to supply a gaseous substance to the at least one flow path; and a controller programmed to stop the supply of the carbon dioxide and the electrolytic solution, and start supply of a gaseous substance from the refresh material source, in accordance with the at least one data.
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公开(公告)号：US10590550B2
公开(公告)日：2020-03-17
申请号：US15251825
申请日：2016-08-30
发明人： Akihiko Ono , Satoshi Mikoshiba , Yuki Kudo , Ryota Kitagawa , Jun Tamura , Yoshitsune Sugano , Eishi Tsutsumi , Masakazu Yamagiwa
摘要： An electrochemical reaction device includes a first unit group having a plurality of first electrochemical reaction units and a second unit group having a plurality of second electrochemical reaction units. Respective electrolytic tanks of the plurality of first electrochemical reaction units are serially connected with each other. Respective electrolytic tanks of the plurality of second electrochemical reaction units are serially connected with each other. The electrolytic tanks of the plurality of second electrochemical reaction units are parallelly connected to the electrolytic tanks of the plurality of first electrochemical reaction units.
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公开(公告)号：US20200002827A1
公开(公告)日：2020-01-02
申请号：US16560332
申请日：2019-09-04
发明人： Asahi Motoshige , Ryota Kitagawa , Akihiko Ono , Yoshitsune Sugano , Yuki Kudo , Jun Tamura , Masakazu Yamagiwa , Satoshi Mikoshiba
摘要： An oxidation electrode in an embodiment includes: a conductive substrate made of a metal material including titanium, titanium alloy, or stainless steel; and an oxidation catalyst layer provided on the conductive substrate and made of a composite body containing nickel and iron. A bonding state of nickel and iron in the composite body containing nickel and iron is composed of Ni(OH)2, NiOOH, and FeOOH.
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6.发明申请公开(公告)号：US20180209053A1
公开(公告)日：2018-07-26
申请号：US15690610
申请日：2017-08-30
发明人： Jun TAMURA , Satoshi Mikoshiba , Yuki Kudo , Akihiko Ono , Ryota Kitagawa , Masakazu Yamagiwa , Yoshitsune Sugano
摘要： 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.
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公开(公告)号：US12012663B2
公开(公告)日：2024-06-18
申请号：US17446472
申请日：2021-08-31
发明人： Yusuke Kofuji , Akihiko Ono , Yuki Kudo , Ryota Kitagawa , Masakazu Yamagiwa , Jun Tamura , Satoshi Mikoshiba
摘要： A carbon dioxide electrolysis device, includes: an anode configured to oxidize water or a hydroxide ion and thus generate oxygen; an anode solution flow path configured to supply an anode solution to the anode; a cathode configured to reduce carbon dioxide to generate a carbon compound; a gas flow path configured to supply a gas to the cathode, the gas containing carbon dioxide; a diaphragm provided between the anode and the cathode and including a porous film with a hydrophilic polymer supported thereon; and a protective member provided between the anode and the diaphragm and protecting the diaphragm.
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公开(公告)号：US11286573B2
公开(公告)日：2022-03-29
申请号：US16559905
申请日：2019-09-04
发明人： Akihiko Ono , Yuki Kudo , Ryota Kitagawa , Masakazu Yamagiwa , Jun Tamura , Satoshi Mikoshiba , Yoshitsune Sugano , Asahi Motoshige , Takayuki Tsukagoshi
摘要： A carbon dioxide electrolytic device comprises: an electrolysis cell including a first electrode having a first catalyst to reduce carbon dioxide, a second electrode having a second catalyst to oxidize water or hydroxide ions, a first electrode flow path facing the first electrode, a second electrode flow path facing the second electrode, and a separator separating the first and second electrodes; a power controller; a first flow path through which the carbon dioxide flows; a second flow path through which the carbon compound flows; a third flow path through which an electrolytic solution containing the water flows; a fourth flow path through which the oxygen flows; a first valve to connect the first electrode flow path and the first flow path; a second valve to connect the first electrode flow path and the second flow path; a tank connected to the first electrode flow path and configured to store a rinse solution; and a controller programmed to control opening and closing of the first and second valves in accordance with performance requirements of the electrolysis cell.
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公开(公告)号：US10465303B2
公开(公告)日：2019-11-05
申请号：US15261030
申请日：2016-09-09
发明人： Jun Tamura , Satoshi Mikoshiba , Yuki Kudo , Akihiko Ono , Ryota Kitagawa , Masakazu Yamagiwa , Yoshitsune Sugano
摘要： A producing system of reduction product of carbon dioxide includes a chemical reaction apparatus including an oxidation reaction electrolytic bath and a reduction reaction electrolytic bath, the chemical reaction apparatus configured to generate a reduction product by reducing carbon dioxide, an electrolytic solution supply unit supplying an electrolytic solution to the reduction reaction electrolytic bath, a carbon dioxide supply unit configured to dissolve carbon dioxide into the electrolytic solution, the carbon dioxide supply unit serving to sustain a reduction reaction in the reduction reaction electrolytic bath, and a separation unit configured to separate the reduction product from the electrolytic solution.
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公开(公告)号：US10344388B2
公开(公告)日：2019-07-09
申请号：US15262362
申请日：2016-09-12
发明人： Yoshitsune Sugano , Ryota Kitagawa , Akihiko Ono , Jun Tamura , Yuki Kudo , Masakazu Yamagiwa , Eishi Tsutsumi , Satoshi Mikoshiba , Asahi Motoshige , Arisa Yamada
摘要： According to one embodiment of a CO2 reduction catalyst of the present invention, a conductive material is immersed in an aqueous solution containing a gold source, and a current or a potential is applied, whereby a highly active CO2 reduction catalyst can be formed in a wide range portion on a surface of the conductive material. According to one embodiment of a CO2 reduction catalyst of the present invention, in a CO2 reduction reaction apparatus including a CO2 reduction electrode having the CO2 reduction catalyst, CO2 is reduced.
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