A copper(ii) coordination compound under water-oxidation reaction at neutral conditions: decomposition on the counter electrode

Abstract

In the context of energy storage, the oxygen-evolving reaction (OER, 2H2O → O2 + 4H+ + 4e-) through the water-oxidation reaction is uphill thermodynamically in overall water splitting. In recent...

Water Oxidation by a Copper(II) Complex with 6,6′-Dihydroxy-2,2′-Bipyridine Ligand: Challenges and an Alternative Mechanism

“…Square wave voltammetry (SWV) of the ligand and complex 1 show a broad peak associated with ligand oxidation (Figure e). After 250 CVs, a new peak related to the oxidation of CuO/Cu 2 O 3 is observed at 1.15 V (Figure f). The ligand-based peak for complex 1 is sharp and observed at 1.02 V (Figure f).…”

“…It is noted that setups affect complex 1 during OER. In a one-cell setup at 1.135 V in the presence of complex 1 , metallic copper is formed on the counter electrode (see also ref ), and the metal complex is oxidized (Figure ) on the surface of the working electrode. On the other hand, a film is also formed on the surface of the working electrode.…”

Green catalytic synthesis of symmetric and non-symmetric β-hydroxy-1,2,3-triazoles by using epichlorohydrin in the presence of Cu(ii) coordination compounds containing oxazole ligands

“…The length of the axial Cu1–N22 bond (2.343(3) Å in 1 and 2.315(2) Å in 2 ) is longer than equatorial Cu–N bonds which is due to Jahn–Teller distortion. 33 Two halogen atoms are coordinated to the equatorial plane. The Cl1–Cu–Cl2 and Br1–Cu–Br2 angles are 94.80(4) and 92.851(17)°, respectively.…”