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Title: Direct 4-Electron Reduction of Molecular Oxygen to Water Mediated by Cu-10-(4-aminophenyl)-5,15-dimesitylcorrole-modified Electrodes
Authors: Isaacs, Fabiola
Dehaen, Wim
Maes, Wouter 
Ngo, Thien H.
Ruiz-Leon, Domingo
Herrera, Francisco
Arce, Roxana
Arevalo, Maria C.
Aguirre, Maria J.
Issue Date: 2013
Publisher: ESG
Abstract: At pH 3 and 7, a glassy carbon electrode modified by deposition of a physio-adsorbed Cu-10-(4-aminophenyl)-5,15-dimesitylcorrole reduces molecular oxygen to water through a 4-electron direct transference. In the case of a glassy carbon electrode modified by electropolymerizing the same corrole on the surface, the reduction occurs by two parallel ways giving peroxide and water simultaneously. However at pH 7 this electrode gives peroxide as the unique product. This indicates that the way of modifying the electrode affects the product of reduction of oxygen. At pH 12, both modified electrodes catalyze the reduction to peroxide. It is noticeable that a Cu-azamacrocycle reduces oxygen to water. At all the studied pH values, the modified electrodes are unstable and lose activity after a first cycle in the presence of oxygen.
Notes: [Isaacs, Fabiola; Ruiz-Leon, Domingo; Herrera, Francisco; Arce, Roxana; Aguirre, Maria J.] Univ Santiago Chile, Fac Quim & Biol, Dept Quim Mat, Lab Polimeros Conductores, Santiago, Chile. [Dehaen, Wim; Maes, Wouter; Ngo, Thien H.] Katholieke Univ Leuven, Dept Chem, B-3001 Louvain, Belgium. [Maes, Wouter] Hasselt Univ, Inst Mat Res IMO IMOMEC, B-3590 Diepenbeek, Belgium. [Ngo, Thien H.] Free Univ Berlin, Inst Chem & Biochem Organ Chem, D-14195 Berlin, Germany. [Arevalo, Maria C.] Univ La Laguna, Dept Quim Fis, Tenerife 38071, Spain.
Keywords: Oxygen to Water Reduction; Cu-Corrole; Modified Electrodes; Electrocatalysis; Reduction and Oxidation of Peroxide;Electrochemistry
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ISSN: 1452-3981
e-ISSN: 1452-3981
ISI #: 000316566700027
Category: A1
Type: Journal Contribution
Validations: ecoom 2014
Appears in Collections:Research publications

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