Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes
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 b...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00134686_v39_n11-12_p1655_Vago |
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todo:paper_00134686_v39_n11-12_p1655_Vago2023-10-03T14:10:57Z Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes Vago, E.R. Calvo, E.J. Stratmann, M. 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 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. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00134686_v39_n11-12_p1655_Vago |
| institution |
Universidad de Buenos Aires |
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I-28 |
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R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Vago, E.R. Calvo, E.J. Stratmann, M. Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| topic_facet |
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 |
| description |
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. |
| format |
JOUR |
| author |
Vago, E.R. Calvo, E.J. Stratmann, M. |
| author_facet |
Vago, E.R. Calvo, E.J. Stratmann, M. |
| author_sort |
Vago, E.R. |
| title |
Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| title_short |
Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| title_full |
Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| title_fullStr |
Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| title_full_unstemmed |
Electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| title_sort |
electrocatalysis of oxygen reduction at well-defined iron oxide electrodes |
| url |
http://hdl.handle.net/20.500.12110/paper_00134686_v39_n11-12_p1655_Vago |
| work_keys_str_mv |
AT vagoer electrocatalysisofoxygenreductionatwelldefinedironoxideelectrodes AT calvoej electrocatalysisofoxygenreductionatwelldefinedironoxideelectrodes AT stratmannm electrocatalysisofoxygenreductionatwelldefinedironoxideelectrodes |
| _version_ |
1782026730730422272 |