Electrocatalysis of oxygen reduction at Fe3O4 oxide electrodes in alkaline solutions
The 0reduction of O2 at Fe3O4 cathodes in alkaline solutions takes place at electrode potentials where partial reduction of the hydrated Fe(III) surface layer occurs. Simultaneous electroreduction of the surface Fe(III) oxide and dioxygen suggests that octahedrally coordinated surface ferrous ions [...
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1992
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| 003 | AR-BaUEN | ||
| 005 | 20230518202941.0 | ||
| 008 | 190411s1992 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0039071629 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a JECHE | ||
| 100 | 1 | |a Vago, E.R. | |
| 245 | 1 | 0 | |a Electrocatalysis of oxygen reduction at Fe3O4 oxide electrodes in alkaline solutions |
| 260 | |c 1992 | ||
| 270 | 1 | 0 | |m Vago, E.R.; Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, 1428 Buenos Aires, Argentina |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a The 0reduction of O2 at Fe3O4 cathodes in alkaline solutions takes place at electrode potentials where partial reduction of the hydrated Fe(III) surface layer occurs. Simultaneous electroreduction of the surface Fe(III) oxide and dioxygen suggests that octahedrally coordinated surface ferrous ions [Fe(II)OH-], are the active sites for oxygen electrocatalysis as proposed earlier for passive iron. The electroreduction of O2 on Fe3O4 cathodes is a two-electron process: O2 + H2O + 2e- → HO2- + HO- Further decomposition of the intermediate peroxide is catalysed by reduced magnetite with a high turnover: 2HO2- → O2 + 2HO- As a consequence of oxygen recycling the apparent number n* of electrons exchanged per oxygen molecule is strongly dependent on mass transport conditions. These results are relevant to understanding the mechanisms of reactions involved in the overall complex corrosion processes of ferrous alloys in aqueous aerated environments and in atmospheric corrosion. © 1992. |l eng | |
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas | ||
| 536 | |a Detalles de la financiación: * Dedicated to Professor Ernest Yeager on the occasion of his retirement and in recognition of his contribution to electrochemistry. ** Permanent research staff of Consejo National de Investigaciones Cientificas y T&znicas (CONICET), Argentina. | ||
| 536 | |a Detalles de la financiación: This work was carried out as part of’s cooperativep rogrammew ith Dr. Martin Stratmanno f EisenforschungI nstitut der Max-Planck Gesselschaft( Dusseldorf, Germany) on the mechanismso f oxygen reduction on well-defined iron oxides. Financial support by CONICET (Argentina) and a Cooperation Research Grant from VolkswagenS tiftung( Germany)a re greatlya ppreciated. Helpful discussionsw ith Dr. M. Blesa and commentsfr om Dr. P. Morando and Dr. A. Regazzonio f the ComisionN ational de Energia Atomica (CNEA), Buenos Aires, are gratefully acknowledged.T he samples of synthetic and geological magnetitew ere kindly suppliedb y Dr. A. Regazzonia nd the Geology Department of Facultad de Ciencias Exactas, Universidad de Buenos Aires, respectively. Electron microscopyw as performedb y Lit. M. Villegas and Dr. A.M.T. Olmedo, CNEA, Buenos Aires. | ||
| 593 | |a Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, 1428 Buenos Aires, Argentina | ||
| 700 | 1 | |a Calvo, E.J. | |
| 773 | 0 | |d 1992 |g v. 339 |h pp. 41-67 |k n. 1-2 |p J Electroanal Chem |x 00220728 |w (AR-BaUEN)CENRE-102 |t Journal of Electroanalytical Chemistry | |
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| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00220728_v339_n1-2_p41_Vago |y Handle |
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