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- W2104200417 abstract "Abstract Information from ex situ characterization can fall short in describing complex materials systems simultaneously exposed to multiple external stimuli. Operando X‐ray absorption spectroscopy (XAS) was used to probe the local atomistic and electronic structure of specific elements in a La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF) thin film cathode exposed to air contaminated with H 2 O and CO 2 under operating conditions. While impedance spectroscopy showed that the polarization resistance of the LSCF cathode increased upon exposure to both contaminants at 750 °C, XAS near‐edge and extended fine structure showed that the degree of oxidation for Fe and Co decreases with increasing temperature. Synchrotron‐based X‐ray photoelectron spectroscopy tracked the formation and removal of a carbonate species, a Co phase, and different oxygen moieties as functions of temperature and gas. The combined information provides insight into the fundamental mechanism by which H 2 O and CO 2 cause degradation in the cathode of solid oxide fuel cells." @default.
- W2104200417 created "2016-06-24" @default.
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- W2104200417 date "2014-09-09" @default.
- W2104200417 modified "2023-10-18" @default.
- W2104200417 title "Operando and In situ X-ray Spectroscopies of Degradation in La<sub>0.6</sub>Sr<sub>0.4</sub>Co<sub>0.2</sub>Fe<sub>0.8</sub>O<sub>3−<i>δ</i></sub>Thin Film Cathodes in Fuel Cells" @default.
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- W2104200417 doi "https://doi.org/10.1002/cssc.201402670" @default.
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