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Homogeneous Electrocatalytic Water Oxidation by a Rigid Macrocyclic Copper( II ) Complex
Author(s) -
Wang Jiawei,
Huang Haihua,
Lu Tongbu
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201600669
Subject(s) - chemistry , electrocatalyst , overpotential , copper , electrolysis , catalysis , inorganic chemistry , glassy carbon , ligand (biochemistry) , electrolysis of water , electrochemistry , electrode , organic chemistry , cyclic voltammetry , biochemistry , receptor , electrolyte
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 /cm 2 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.