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Updated: Jun 7, 2025

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
Unveiling the effect of codoping in strontium ferrite for oxygen evolution in alkaline media
Shuangshuang Zhu1, Mingyuan Wang2, Yuguang Mao1
1Henan Key Laboratory of Quantum Materials and Quantum Energy, School of Quantum Information Future Technology, Henan University, Zhengzhou 450046, China. wfzhang@henu.edu.cn.
Abstract:
Co and Ni codoped strontium ferrite particles were prepared by a solid-state strategy and employed as catalysts for the OER. They exhibited a Tafel slope of 55 mV dec-1 and required an overpotential of 334 mV to afford a current density of 10 mA cm-2, which is lower than that of Co and Ni separately doped samples. The DFT calculations reveal the redistribution of local charge around Fe atoms, decrease of energy barriers, and increase of conductivity by doping. This work unveils the effect of codoping on the activities of Fe-based perovskite oxide for the OER, providing a strategy to engineer other perovskite-based materials for catalysis.
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