Mesoporous Ni–Fe oxide multi-composite hollow nanocages for efficient electrocatalytic water oxidation reactions

The mesoporous NiO/NiFe₂O₄multi-composite hollow nanocage electrodes are fabricated and achieve a low overpotential (303 mV at 10 mV cm⁻²) and Tafel plot (58.5 mV dec⁻¹), respectively, and excellent cycling stability (12 h) as an anode material for oxygen evolution reaction, holding great promise for water splitting.