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Developing highly efficient and less-expensive electrocatalysts toward the oxygen evolution reaction (OER) is an ongoing effort for sustainable energy generation and faces great challenges in achieving more effective and renewable energy conversion systems. Herein, we report the synthesis of Ni-doped Fe₂O₃ (denoted as Ni–Fe₂O₃) nanoclews as a highly efficient electrocatalyst via a facile light-assisted solution chemistry route without employing any template. Ni–Fe₂O₃ nanoclews demonstrate superior electrocatalytic activity toward OER with a low overpotential of 277 mV at current density of 10 mA cm^–2 and small Tafel slope of 68 mV dec^–1, accompanied by their excellent durability. Outstanding OER activity with long-standing structural and morphological stability of the nanoclews has been achieved by virtue of their clew-like morphology, comprising tiny nanorods with uniform distribution of constituent …