Proton-coupled oxygen reduction at liquid-liquid interfaces catalyzed by cobalt porphine.
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).
Hatay
Imren
I
Laboratoire d'Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, Switzerland.
Su
Bin
B
Li
Fei
F
Méndez
Manuel Alejandro
MA
Khoury
Tony
T
Gros
Claude P
CP
Barbe
Jean-Michel
JM
Ersoz
Mustafa
M
Samec
Zdenek
Z
Girault
Hubert H
HH
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
D008665:Metalloporphyrins; D011522:Protons; C546020:porphinecobalt(II); D014867:Water; D010100:Oxygen