The appropriate co-doping of Ce and Gd into NiFe-LDH creates abundant oxygen vacancies. During the oxygen evolution reaction (OER), Ce segregates as CeO2 nano-islands while Gd remains uniformly dispersed, jointly enhancing stability. Ce,Gd-NiFe LDH achieves an overpotential 30 mV lower than NiFe-LDH (228 mV) at 10 mA cm-2 and operates stably for over 140 h.
X. Bao, J. Wang, Y. Yang, Q. Liu, X. Fan, S. Mao, Y. Gong and L. Gou, Chem. Commun., 2026, Accepted Manuscript , DOI: 10.1039/D6CC00175K
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