(19)
(11) EP 4 435 149 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.10.2024 Bulletin 2024/42

(43) Date of publication A2:
25.09.2024 Bulletin 2024/39

(21) Application number: 23196520.3

(22) Date of filing: 11.09.2023
(51) International Patent Classification (IPC): 
C25B 1/23(2021.01)
C25B 3/07(2021.01)
C25B 9/23(2021.01)
C25B 11/063(2021.01)
 C25B 3/03(2021.01)
C25B 3/26(2021.01)
C25B 11/052(2021.01)
C25B 1/04(2021.01)
(52) Cooperative Patent Classification (CPC):
C25B 1/23; C25B 3/03; C25B 3/07; C25B 3/26; C25B 9/23; C25B 11/052; C25B 11/063; C25B 1/04
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 23.03.2023 JP 2023046157
22.08.2023 JP 2023134597

(71) Applicant: KABUSHIKI KAISHA TOSHIBA
Minato-ku Tokyo 105-0023 (JP)

(72) Inventors:
  • Yonetsu, Maki
    Minato-ku, Tokyo, 105-0023 (JP)
  • Kudo, Yuki
    Minato-ku, Tokyo, 105-0023 (JP)
  • Kitagawa, Ryota
    Minato-ku, Tokyo, 105-0023 (JP)
  • Mikoshiba, Satoshi
    Minato-ku, Tokyo, 105-0023 (JP)
  • Ono, Akihiko
    Minato-ku, Tokyo, 105-0023 (JP)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

   


(54) CARBON DIOXIDE ELECTROLYTIC DEVICE AND METHOD OF ELECTROLYZING CARBON DIOXIDE


(57) A carbon dioxide electrolytic device of an embodiment includes: an electrolysis cell including a cathode to reduce carbon dioxide, an anode to oxidize water or hydroxide ion and having a base containing titanium, a cathode flow path to supply carbon dioxide to the cathode, an anode flow path to supply an electrolytic solution containing water to the anode, and a separator to separate the anode and the cathode; a gas supply unit to supply carbon dioxide to the cathode flow path; at least either of a humidifier to humidify carbon dioxide supplied to the cathode flow path by using a humidification water, and a liquid pouring part to add the humidification water to the carbon dioxide; and an electrolytic solution supply unit to supply the electrolytic solution to the anode flow path. At least one of the electrolytic solution, the humidification water, and the supplied gas contains an oxidant.







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