In situ CCD video and voltammetric studies on enhanced cathodic peak observed at a hanging mercury drop electrode during consecutive two one-electron redox reactions in aprotic solutions

Metal Influence in Porphyrine Structure on Kinetic of Electrodeposition and Morphology of Hydroxyphenylporphyrins Based Films

“…2 a, b, curve 3) shows intense irreversible peak of oxygen electroreduction at potentials more negative than -0.5 V. In the absence of porphyrins the electroreduction of oxygen in DMSO is quasi reversible (inset in Fig. 2a) and leads to superoxide anion radicals formation through the one-electron mechanism: (O 2 •-): О 2 + е → O 2 •- [36][37][38][39]. At the porphyrins presence the electroreduction of oxygen turn to irreversibility due to an effective interaction of superoxide with porphyrins [40][41][42][43].…”