Spinel ZnCo2O4Nanosheets Supported on Ni Foam as Electrocatalysts for the Oxygen Evolution Reaction


Shi J. Yu D. Yu X. Sarsenbekuly B. Zhao Z. Kang W. Aidarova S.B.
17 October 2025American Chemical Society

ACS Applied Nano Materials
2025#8Issue 4120077 - 20087 pp.

Oxygen evolution reaction (OER) involves the multistep atomic coupling electron transfer process, which serves as the rate-limiting step in electrocatalytic water splitting. Hence, the design of OER catalysts with high performance and stability represents a critical factor in promoting the oxygen evolution reaction. In this study, ZC/NF-mncatalysts were fabricated by the hydrothermal method, achieving the in situ growth of spinel active phase (ZnCo2O4) on the three-dimensional porous skeleton of nickel foam. Among these catalysts, the ZC/NF-m2catalyst requires an overpotential of only 222 mV at a current density of 10 mA·cm–2in neutral medium. Multiple characterization results demonstrate that the OER performance of the ZC/NF-m2catalyst with ZnCo2O4phase is superior to that of the single metal oxides (Co3O4and ZnO) owing to the synergistic effects of the multicomponent system. More importantly, an appropriate growth amount of the spinel active phase not only optimizes the morphology properties but also provides abundant oxygen vacancies and Co2+–Ovstructures on the catalyst surface, which are crucial for the adsorption of molecular oxygen and electron transfer during the oxygen evolution process. The ZC/NF-m2catalyst with excellent stability and efficient electrocatalytic performance presents a design strategy for developing non-precious-metal materials for oxygen evolution reaction.

electrocatalysis , neutral medium , nickel foam , oxygen evolution reaction , ZnCo2O4

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Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang, 110034, China
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China

Kazakh-British Technical University
Institute of Catalysis for Energy and Environment
State Key Laboratory of Heavy Oil Processing

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