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- W2088790855 abstract "The primary aim of this work was to establish the mechanism of the oxygen reduction reaction (ORR) at (La0.8Sr0.2)0.98MnO3 (LSM)-based cathodes in solid oxide fuel cells. Rate equations, based on the Butler−Volmer equation and employing either Langmuir or Temkin adsorption conditions for reactant and intermediate species, were derived, yielding predicted reaction orders and transfer coefficients. Experimental data were collected using half-cell cyclic voltammetry in a variable pO2 atmosphere (0.03 to 1 atm) at 600 to 900 °C, using both dense and porous LSM-based cathodes, employed to establish the impact of the accessibility of the active site on cathode activity. The rate of the ORR at dense LSM has been found to be limited by the dissociation of at low currents and by the first electron-transfer step, reducing O2ads to , at high currents. However, at porous LSM cathodes, the reaction mechanism is more difficult to deduce because the electrode morphology impacts significantly on the measured kinetic and mechanistic parameters, giving anomalous transfer coefficients of <0.5." @default.
- W2088790855 created "2016-06-24" @default.
- W2088790855 creator A5035378389 @default.
- W2088790855 creator A5038372990 @default.
- W2088790855 date "2006-05-24" @default.
- W2088790855 modified "2023-10-16" @default.
- W2088790855 title "Mechanistic Analysis of the Oxygen Reduction Reaction at (La,Sr)MnO<sub>3</sub> Cathodes in Solid Oxide Fuel Cells" @default.
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- W2088790855 doi "https://doi.org/10.1021/jp060099h" @default.
- W2088790855 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16771400" @default.
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