Karadas, Ferdi/0000-0001-7171-9889WOS: 000394144300010Although cobalt-based heterogeneous catalysts are the central focus in water oxidation research, interest in copper-based water oxidation catalysts has been growing thanks the great abundance of copper and its biological relevance. Several copper oxides have recently been reported to be active catalysts for water oxidation. in this study, a heterogeneous copper-based water oxidation catalyst that is not an oxide has been reported for the first time. Single-crystal XRD studies indicate that the compound is a one-dimensional coordination compound incorporating copper paddle-wheel units connected through phosphine dioxide ligands. the catalyst exhibits an onset potential of 372mV at pH10.2, whereas an overpotential of only 563mV is required to produce a current density of 1mAcm(-2). in addition to cyclic voltammetric and chronoamperometric studies, an investigation into the effect of pH on the catalytic activity and the robustness of the catalyst using long-term bulk electrolysis (12h) is presented.Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [214Z095]; TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [1929B011500059]The authors thank the Scientific and Technological Research Council of Turkey (TUBITAK) for financial support (Project No. 214Z095). E.U. thanks TUBITAK for support (Project 1929B011500059)
