Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism

A complete kinetic study of oxygen electroreduction on Fe3O4 electrodes is presented and the results are analysed with a general kinetic scheme that includes intermediate peroxide reduction (k3), heterogeneous disproportionation (k4), adsorption (k6) and desorption (k5). The kinetic analysis takes i...

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Autores principales: Vago, Ernesto Rómulo, Calvo, Ernesto Julio
Publicado: 1995
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v91_n15_p2323_Vago
http://hdl.handle.net/20.500.12110/paper_09565000_v91_n15_p2323_Vago
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09565000_v91_n15_p2323_Vago
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spelling paper:paper_09565000_v91_n15_p2323_Vago2023-06-08T15:56:03Z Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism Vago, Ernesto Rómulo Calvo, Ernesto Julio A complete kinetic study of oxygen electroreduction on Fe3O4 electrodes is presented and the results are analysed with a general kinetic scheme that includes intermediate peroxide reduction (k3), heterogeneous disproportionation (k4), adsorption (k6) and desorption (k5). The kinetic analysis takes into account the chemistry of FeII at the oxide surface. The reduction of oxygen follows an electrochemical-chemical-electrochemical (ECE) mechanism with the chemical oxidation of surface FeII by O2 and the electrochemical reduction of the FeIII site. The kinetic similarities of the cathodic reduction of oxygen on other FeII systems, such as passive iron and iron-macrocycle-modified electrodes, are discussed. Fil:Vago, E.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calvo, E.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1995 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v91_n15_p2323_Vago http://hdl.handle.net/20.500.12110/paper_09565000_v91_n15_p2323_Vago
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A complete kinetic study of oxygen electroreduction on Fe3O4 electrodes is presented and the results are analysed with a general kinetic scheme that includes intermediate peroxide reduction (k3), heterogeneous disproportionation (k4), adsorption (k6) and desorption (k5). The kinetic analysis takes into account the chemistry of FeII at the oxide surface. The reduction of oxygen follows an electrochemical-chemical-electrochemical (ECE) mechanism with the chemical oxidation of surface FeII by O2 and the electrochemical reduction of the FeIII site. The kinetic similarities of the cathodic reduction of oxygen on other FeII systems, such as passive iron and iron-macrocycle-modified electrodes, are discussed.
author Vago, Ernesto Rómulo
Calvo, Ernesto Julio
spellingShingle Vago, Ernesto Rómulo
Calvo, Ernesto Julio
Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism
author_facet Vago, Ernesto Rómulo
Calvo, Ernesto Julio
author_sort Vago, Ernesto Rómulo
title Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism
title_short Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism
title_full Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism
title_fullStr Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism
title_full_unstemmed Electroreduction of oxygen on Fe3O4 electrodes. Part 2. - Rotating ring-disc electrode studies and mechanism
title_sort electroreduction of oxygen on fe3o4 electrodes. part 2. - rotating ring-disc electrode studies and mechanism
publishDate 1995
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v91_n15_p2323_Vago
http://hdl.handle.net/20.500.12110/paper_09565000_v91_n15_p2323_Vago
work_keys_str_mv AT vagoernestoromulo electroreductionofoxygenonfe3o4electrodespart2rotatingringdiscelectrodestudiesandmechanism
AT calvoernestojulio electroreductionofoxygenonfe3o4electrodespart2rotatingringdiscelectrodestudiesandmechanism
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