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. 2021 Nov 24;12:6814. doi: 10.1038/s41467-021-26739-1

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© The Author(s) 2021, corrected publication 2022

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Fig. 6 — Schematic illustration of the fuel electrode side of Pr_0.5Ba_0.5−xSr_xFeO_3−δ (x = 0, 0.3, and 0.5) symmetrical cells and its relation to electrochemical performances.