A mononuclear cobalt complex for water oxidation: new controversies and puzzles.

Herein the role of a mononuclear cobalt(iii) complex, [CoIII(DPKOH)2]ClO4 (DPK = di(2-pyridyl)ketone), in the water electrooxidation process is investigated with scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction studies, NMR, chronoamperometry, cyclic voltammetry, extended X-ray absorption fine structure and X-ray absorption near edge structure determination. Our experiments show that, in comparison to the reported literature, other cobalt-containing structures on the surface of the FTO electrode could also be the true catalyst for water oxidation.

Water oxidation by a soluble iron(III)-cyclen complex: new findings.

Herein, the role of iron oxide in the electrochemical water oxidation of an iron cyclen (cyclen = 1,4,7,10-tetraazacyclododecane) is considered using scanning electron microscopy, energy-dispersive spectrometry, X-ray diffraction, nuclear magnetic resonance spectroscopy, chronoamperometry, cyclic voltammetry and electrochemical impedance spectroscopy.

New findings and the current controversies for water oxidation by a copper(ii)-azo complex: homogeneous or heterogeneous?

In this paper, new findings for the water-oxidizing activity of [(L)Cu(II)(NO3)], (L = (E)-3-(pyridin-2-yldiazenyl)naphthalen-2-ol (HL)) under both electro-water oxidation conditions and in the presence of cerium(iv) ammonium nitrate are reported.