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• W4360975551 abstract "A La_0.5Ba_0.5MnO_3-δ oxide was prepared using the sol-gel technique. Instead of a pure phase, La_0.5Ba_0.5MnO_3-δ was discovered to be a combination of La_0.₇Ba_0.₃MnO_3-δ and BaMnO₃. The in-situ production of La_0.₇Ba_0.₃MnO_3-δ+BaMnO₃ nanocomposites enhanced oxygen vacancy formation compared to single-phase La_0.₇Ba_0.₃MnO_3-δ- or BaMnO₃, providing potential benefits as a cathode for fuel cells. Subsequently, La_0.₇Ba_0.₃MnO_3-δ-+BaMnO₃ nanocomposites were utilized as the cathode for proton-conducting solid oxide fuel cells (H-SOFCs), which significantly improved cell performance. At 700 ^oC, an H-SOFC with a La_0.₇Ba_0.₃MnO_3-δ+ BaMnO₃ nanocomposite cathode achieved the highest power density yet recorded for H-SOFCs with manganate cathodes: 1504 mW cm^-2. This performance was much greater than the single-phase La_0.₇Ba_0.₃MnO_3-δ or BaMnO₃ cathode cells. In addition, the cell demonstrated excellent working stability. First-principles calculations indicated that the La_0.₇Ba_0.₃MnO_3-δ/BaMnO₃ interface was crucial for the enhanced cathode performance. The oxygen reduction reaction (ORR) free energy barrier was significantly lower at the La_0.₇Ba_0.₃MnO_3-δ/BaMnO₃ interface than at the La_0.₇Ba_0.₃MnO_3-δ or BaMnO₃ surfaces, which explained the origins of the high performance and gave a guide for the construction of novel cathodes for H-SOFCs." @default.
• W4360975551 created "2023-03-30" @default.
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• W4360975551 date "2023-06-01" @default.
• W4360975551 modified "2023-10-14" @default.
• W4360975551 title "Attempted preparation of La _0.5Ba _0.5MnO _{3− <i>δ</i>} leading to an <i>in-situ</i> formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells" @default.
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• W4360975551 doi "https://doi.org/10.26599/jac.2023.9220748" @default.
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