(19)
(11) EP 4 817 104 A1

(12)

(43) Date of publication:
07.10.2026 Bulletin 2026/41

(21) Application number: 24821143.5

(22) Date of filing: 27.11.2024
(51) International Patent Classification (IPC): 
H01M 4/90(2006.01)
H01M 4/92(2006.01)
(52) Cooperative Patent Classification (CPC):
C25B 1/04; C25B 11/093; H01M 4/9016; H01M 4/923; H01M 4/926; H01M 4/881; Y02E 60/36; Y02E 60/50
(86) International application number:
PCT/GB2024/052977
(87) International publication number:
WO 2025/114700 (05.06.2025 Gazette 2025/23)
(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:
GE KH MA MD TN

(30) Priority: 30.11.2023 GB 202318307

(71) Applicant: Johnson Matthey Hydrogen Technologies Limited
Royston SG8 5HE (GB)

(72) Inventors:
  • LUISMAN, Luke Alan
    Reading, RG4 9NH (GB)
  • STEVENS, James George
    Reading, RG4 9NH (GB)

(74) Representative: Johnson Matthey Public Limited Company 
Blounts Court Road, Sonning Common Intellectual Property Department
Reading RG4 9NH
Reading RG4 9NH (GB)

   


(54) PROCESS FOR MANUFACTURING SUPPORTED IRIDIUM OXYGEN EVOLUTION REACTION CATALYST, A PRODUCT THEREOF AND ITS USE