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- W2000563351 abstract "The complex N,N',N″,N‴ -tetramethyl-tetra-3,4-pyridinoporphyrazinocobalt(II) ([ Co II TMPz [4+]) 4+ adsorbed on a graphite electrode undergoes spontaneous reduction, forming a surface containing Co I . Five reversible surface peaks are observed at low pH, two of which are two-electron concerted processes. At high pH, one of these two-electron processes splits into two one-electron waves. Both oxidation and reduction of the central metal can be observed, along with successive reduction steps involving the porphyrazine ligand. Notable is the marked shift to positive potentials of these processes, relative to unsubstituted cobalt phthalocyanine, due to the positive charge localized on the porphyrazine. The electrocatalytic activity of this complex modified electrode toward the reduction of hydrogen peroxide is also reported. We demonstrate that a series of different surfaces exist which are obtained by variation of pH and polarization potential and that these surfaces possess differing electrocatalytic activity. Surfaces inactive to hydrogen peroxide can exist at potentials more negative than active surfaces even though the driving force for peroxide reduction will be greater for the former." @default.
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- W2000563351 date "2006-10-01" @default.
- W2000563351 modified "2023-10-16" @default.
- W2000563351 title "Surface electrochemistry of N,N',N″,N‴-tetramethyl-tetra-3,4-pyridinoporphyrazinocobalt(II)" @default.
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- W2000563351 doi "https://doi.org/10.1142/s1088424606000600" @default.
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