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Hierarchical urchin-like CuxCo3xO4 spinels as oxygen evolution reaction catalysts in alkaline anion exchange membrane water electrolyzers

Lookup NU author(s): Rose Anne Acedera, Dr Gaurav GuptaORCiD, Professor Mohamed MamloukORCiD


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© 2023, Iranian Chemical Society. In this work, powdered hierarchical Cu xCo3−xO4 catalysts were used as catalysts for the oxygen evolution reaction (OER) in an alkaline anion exchange membrane water electrolyzer (AAEMWE). The effect of increasing Cu concentration (x = 0, 0.25, 0.5, 0.75, and 1) on the OER catalysis performance of the spinel Co3O4 was studied. In general, Cu-doped Co3O4 samples performed better than the undoped spinel catalyst. The sample synthesized with Cu-doping at x = 0.75 (CCO-0.75) performed the best among the catalysts tested with an overpotential of 385 mV at 10 mA cm−2 in 1 M KOH, which is 24% lower than that recorded for the undoped Co3O4 sample. An AAEMWE was assembled using CCO-0.75 on Ti gas diffusion layer (GDL), and Pt/C on carbon GDL as the anode, and cathode, respectively. The CCO-0.75||Pt/C cell required only 1.65 V to reach 100 mA cm−2 at 60 ℃ in 1 M KOH.

Publication metadata

Author(s): Acedera RA, Gupta G, Mamlouk M, Kawano K, Shunsuke Y, Balela MD

Publication type: Article

Publication status: Published

Journal: Journal of the Iranian Chemical Society

Year: 2023

Volume: 21

Pages: 151–165

Online publication date: 25/10/2023

Acceptance date: 03/10/2023

ISSN (print): 1735-207X

ISSN (electronic): 1735-2428

Publisher: Springer Nature


DOI: 10.1007/s13738-023-02914-7


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Funder referenceFunder name
Commission on Higher Education (CHED, Philippines)
British Council
Philippine Department of Science and Technology Science Education Institute (DOST SEI)