Abstract
AbstractA copper(II) complex with a rigid macrocyclic ligand has been synthesized and utilized as a homogeneous electrocatalyst for water oxidation in sodium phosphate buffer at pH 12.0. By using a glassy carbon electrode in a 3 h electrolysis, a high current density of 1.3–1.4 mA/cm2 and a turn‐over number of 4 can be obtained with 1.0 mmol•L−1 of the copper catalyst at an overpotential of 750 mV. Kinetic studies revealed that the electrocatalysis with this complex is a single‐site catalysis with proton‐coupled electron transfers. Finally, its possible catalytic mechanism was tentatively proposed.
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