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- W2783100586 abstract "The oxygen-reduction and oxygen-evolution reactions (ORR and OER) at 700 °C on the perovskites ABO3−δ (A = La, Sr and B = Co, Fe, Mn, Cr with undoped versus Nb- or Ta-doped SrCoO3−δ) have been evaluated experimentally with a reversible solid oxide fuel cell (R-SOFC). The predictor for active ORR catalysis at 20 °C in alkaline solution is not applicable at 700 °C; the adsorbed water on the oxide catalyst surface is lost. In a SOFC, the ORR is split between the fuel and the oxygen electrode; in an alkaline air battery, the entire ORR occurs at the oxygen electrode. On the other hand, the OER reaction occurs by a similar process at the oxygen electrode in a R-SOFC at 700 °C and in an air battery or room-temperature fuel cell in an alkaline solution. A proposed condition for both the ORR and the OER occurring at the same oxoperovskite surface at 700 °C is a transition-metal cation of the perovskite at its equilibrium oxidation state at the operating temperature and pO2." @default.
- W2783100586 created "2018-01-26" @default.
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- W2783100586 date "2018-02-05" @default.
- W2783100586 modified "2023-10-16" @default.
- W2783100586 title "Oxygen-Electrode Catalysis on Oxoperovskites at 700 °C versus 20 °C" @default.
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- W2783100586 doi "https://doi.org/10.1021/acs.chemmater.7b03281" @default.
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