Electrocatalytic water oxidation by copper(ii) complexes with a pentadentate amine-pyridine ligand

Abstract

Two five-coordinate mononuclear copper complexes, [Cu(mpydien)](ClO4)2 (1, mpydien = 5-methyl-1,9-bis (2-pyridyl)-2,5,8-triazanonane) and [Cu(pydien)](ClO4)2 (2, pydien = 1,9-bis (2-pyridyl)-2,5,8-triazanonane), are synthesized and found to be molecular electrochemical water oxidation catalyst (WOCs)...

Efficient homogeneous electrochemical water oxidation by a copper(ii) complex with a hexaaza macrotricyclic ligand

“…Therefore, there is no deposition containing Cu element on the surface of ITO electrode. 63,64 Finally, the UV-Vis absorption spectra of the electrolyte before and after the CPE experiment indicate the decomposition of about 9% of the catalyst (Fig. S22, ESI†), which should be ascribed to the reduction of Cu( ii ) to Cu(0), similar to some cases of homogeneous Cu-based WOCs.…”

Electrochemical water oxidation catalyzed by a mononuclear cobalt complex of a pentadentate ligand: the critical effect of the borate anion

“…S16 and S17, ESI†), giving a Faraday efficiency of 97%, which is comparable with those of reported homogeneous WOCs. 38,50,51,54,55…”

“…S16 and S17, ESI †), giving a Faraday efficiency of 97%, which is comparable with those of reported homogeneous WOCs. 38,50,51,54,55 After the CPE experiment, the micro morphology of the surface of the used ITO electrode was analyzed by scanning electron microscopy (SEM), as well as energy-dispersive spectroscopy (EDX). According to the SEM images depicted in Fig.…”

Polyoxometalate-Supported Copper(I)–Pyrazole Complex: Unusual Stability, Geometrical Isomers, Organic Transformation, and Computation

“…This assignment is consistent with the relevant literature. 43 The quasi-reversible response at −0.11 V vs Ag/AgCl ( E PC = −0.25 V and E PA = 0.03 V) can be assigned to the Cu(II)/Cu(I) couple according to the relevant literature. 44 The oxidation of Cu(II) to Cu(III) being irreversible can be explained by hard–soft interactions (Cu 3+ as an acceptor and hard acid, N as the donor atom and soft base).…”