title: Proton-coupled oxygen reduction at liquid-liquid interfaces catalyzed by cobalt porphine.
abstract: 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, Fc, or O(2).
authors.affiliation: Laboratoire d'Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, Switzerland.
authors.forename: Imren
authors.initials: I
authors.lastname: Hatay
authors.forename: Bin
authors.initials: B
authors.lastname: Su
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.forename: Manuel Alejandro
authors.initials: MA
authors.lastname: Méndez
authors.forename: Tony
authors.initials: T
authors.lastname: Khoury
authors.forename: Claude P
authors.initials: CP
authors.lastname: Gros
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Barbe
authors.forename: Mustafa
authors.initials: M
authors.lastname: Ersoz
authors.forename: Zdenek
authors.initials: Z
authors.lastname: Samec
authors.forename: Hubert H
authors.initials: HH
authors.lastname: Girault
mesh_terms: D002384:Catalysis; D004553:Electric Conductivity; D004563:Electrochemistry; D004579:Electron Transport; D004583:Electrons; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008665:Metalloporphyrins / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D011522:Protons; D013816:Thermodynamics; D014867:Water / Q000737:chemistry
chemical_list: D008665:Metalloporphyrins; D011522:Protons; C546020:porphinecobalt(II); D014867:Water; D010100:Oxygen