Application of Co3O4 as anode catalyst in CO2 electrolyzer cells

Kormányos A, Priamushko T, Samu GF, Samu A, Endrődi B, Cherevko S, Janáky C (2025)

Publication Type: Journal article

Publication year: 2025

Journal

NPG Asia Materials Nature Publishing Group

Book Volume: 17

Article Number: 18

Journal Issue: 1

DOI: 10.1038/s41427-025-00598-4

Abstract

Replacing Ir with anode catalyst materials that are more abundant is a long-sought objective within the CO2 electrolysis community. The chemical environment (near-neutral pH, carbonate buffer electrolyte) that inherently develops during long-term operation, however, limits the pool of applicable candidates. In this contribution, Ir was replaced with a porous Co3O4 nanosheet catalyst layer as the anode of a zero-gap CO2 electrolyzer cell. The catalyst was directly deposited on the Ti porous transport layer via hydrothermal synthesis, which allowed the precise control of the catalyst loading. Under optimal conditions (7 mg cm^-2 Co3O4 loading), 300 mA cm^-2 current density was reached at 3.4 V applied cell voltage. The electrolyzer cell with the Co3O4 anode was operated continuously for 50 hours at 250 mA cm^-2 current density with stable cell voltage and CO2 reduction selectivity.

Involved external institutions

University of Szeged / József Attila Tudományegyetem Szeged

Hungary (HU) Forschungszentrum Jülich / Research Centre Jülich (FZJ)

Germany (DE)

How to cite

APA:

Kormányos, A., Priamushko, T., Samu, G.F., Samu, A., Endrődi, B., Cherevko, S., & Janáky, C. (2025). Application of Co3O4 as anode catalyst in CO2 electrolyzer cells. NPG Asia Materials, 17(1). https://doi.org/10.1038/s41427-025-00598-4

MLA:

Kormányos, Attila, et al. "Application of Co3O4 as anode catalyst in CO2 electrolyzer cells." NPG Asia Materials 17.1 (2025).

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