摘要
A 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.
A 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.
