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Abstract:

A comparative study of O2 reduction on well defined iron oxides Fe3O4 and γ-FeOOH is presented. The Fe(III)/Fe(II) surface stoichiometry strongly depends on potential and determines the electronic conductivity and electron transfer rate to soluble redox species. A common feature of O2 reduction on both oxides is the occurrence of Fe2+ surface sites simultaneous to O2 reduction, which is necessary for the specific interaction between Fe(II) and O2. The electrocatalytic differences for γ-FeOOH and Fe3O4 are related to differences in oxide structure and different structure of the oxide-electrolyte interface. © 1994.

Registro:

Documento: Artículo
Título:Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes
Autor:Vago, E.R.; Calvo, E.J.; Stratmann, M.
Filiación:INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Max-Planck Institut für Eisenforschung, Max-Planck Strasse 1, 4000 Düsseldorf, Germany
Palabras clave:electrocatalysis; iron oxide; oxygen; peroxide; Catalysis; Composition; Electric conductivity; Electrochemistry; Electrodes; Electrolytes; Interfaces (materials); Iron oxides; Oxygen; Peroxides; pH; Structure (composition); Cyclic voltammetry; Electrocatalysis; Electronic conductivity; Rotating disc electrodes; Soluble redox species; Surface stoichiometry; X ray photoelectron spectroscopy; Reduction
Año:1994
Volumen:39
Número:11-12
Página de inicio:1655
Página de fin:1659
DOI: http://dx.doi.org/10.1016/0013-4686(94)85150-6
Título revista:Electrochimica Acta
Título revista abreviado:Electrochim Acta
ISSN:00134686
CODEN:ELCAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00134686_v39_n11-12_p1655_Vago

Referencias:

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Citas:

---------- APA ----------
Vago, E.R., Calvo, E.J. & Stratmann, M. (1994) . Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes. Electrochimica Acta, 39(11-12), 1655-1659.
http://dx.doi.org/10.1016/0013-4686(94)85150-6
---------- CHICAGO ----------
Vago, E.R., Calvo, E.J., Stratmann, M. "Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes" . Electrochimica Acta 39, no. 11-12 (1994) : 1655-1659.
http://dx.doi.org/10.1016/0013-4686(94)85150-6
---------- MLA ----------
Vago, E.R., Calvo, E.J., Stratmann, M. "Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes" . Electrochimica Acta, vol. 39, no. 11-12, 1994, pp. 1655-1659.
http://dx.doi.org/10.1016/0013-4686(94)85150-6
---------- VANCOUVER ----------
Vago, E.R., Calvo, E.J., Stratmann, M. Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes. Electrochim Acta. 1994;39(11-12):1655-1659.
http://dx.doi.org/10.1016/0013-4686(94)85150-6