Published January 1, 2009
| Version v1
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Proton-Coupled Oxygen Reduction at Liquid-Liquid Interfaces Catalyzed by Cobalt Porphine
Creators
- 1. Ecole Polytech Fed Lausanne, Lab Electrochim Phys & Analyt, Stn 6, CH-1015 Lausanne, Switzerland
- 2. Univ Bourgogne, Inst Chim Mol, ICMUB, UMR 5260, F-21078 Dijon, France
- 3. Selcuk Univ, Dept Chem, TR-42031 Konya, Turkey
- 4. Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic
Description
Cobalt porphine (COP) dissolved in the organic phase of a biphasic system is used to catalyze O-2 reduction by an electron donor, ferrocene (Fc). Using voltammetry at the interface between two immiscible electrolyte solutions (ITIES), it is possible to drive this catalytic reduction at the interface as a function of the applied potential difference, where aqueous protons and organic electron donors combine to reduce O-2. The current signal observed corresponds to a proton-coupled electron transfer (PCET) reaction, as no current and no reaction can be observed in the absence of either the aqueous acid, COP, c, or O-2.
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