Oxygen Nonstoichiometry and Valence State of Manganese in La_1-x Ca _x MnO_3+δ.

ABSTRACT: Perovskites of the ABO₃ type, such as LaMnO₃, can be used as air electrodes in solid oxide fuel cells and electrolyzers. Their properties can be tuned by A- and B-site substitutions. The influence of La substitution by Ca on the oxygen nonstoichiometry has been investigated frequently, but the results depend highly on the synthesis and atmospheric conditions. In this work, a series of La_1-x Ca _x MnO_3+δ (x = 0-0.5) was synthesized using conventional solid-state synthesis under an air atmosphere. The structures of the materials were studied in detail with powder X-ray diffraction. The initial oxygen nonstoichiometries were determined using thermogravimetric reduction. The samples were subsequently analyzed in terms o

SUBMITTER: Heuer SA 

PROVIDER: S-EPMC8047706 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature