Herein, we have demonstrated a facile method for the synthesis of CeO/Ce-Co-LDH heterostructures using zeolitic imidazolate framework-67 as the precursor. The Ce-incorporation in Co-LDH results in 4f-2p-3d orbital overlap to tune the electronic structure whereas the oxygen-deficient CeO controls the interface charge transfer. This results in excellent water oxidation activity to attain 500 mA cm current density at 320 overpotential.
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