Oxygen electro-reduction on iron oxide electrodes: III. Heterogeneous catalytic H2O2 decomposition
Oxygen reduction on two well-defined iron oxide electrodes (γ-FeOOH and Fe3O4) shows deviations from linear Koutecky-Levich plots. These results can be explained by two limiting cases of the heterogeneous catalytic peroxide decomposition mechanism proposed by McIntyre (J. Phys. Chem., 71 (1967) 1196...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00220728_v388_n1-2_p161_Vago |
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| Sumario: | Oxygen reduction on two well-defined iron oxide electrodes (γ-FeOOH and Fe3O4) shows deviations from linear Koutecky-Levich plots. These results can be explained by two limiting cases of the heterogeneous catalytic peroxide decomposition mechanism proposed by McIntyre (J. Phys. Chem., 71 (1967) 1196; J. Phys. Chem., 73 (1969) 4102). Recycling of oxygen by peroxide decomposition at the oxide surfaces depends on the relative magnitude of the peroxide decomposition rate (k4), the convective-diffusion flux (ZpW1 2) and the oxygen adsorption kinetics ( k2 k-2). © 1995. |
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