Herein, we have demonstrated Lewis acid Fe(III)-assisted hydroxylation of ZIF-67 to form FeCo-layered double hydroxide (LDH) nanosheets. The catalyst FeCo-LDH produced an excellent water oxidation activity to reach a current density of 20 mA cm at only 190 mV overpotential, superior to that of hydrothermally synthesized LDH with a similar composition.
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