By substituting 10% of Fe with Mn, the researchers synthesized La₀.₆Ca₀.₄Co₀.₂Fe₀.₇Mn₀.₁O₃_-d (LCCF_6428) via ultrasonic spray pyrolysis. This new composition improved hydrogen tolerance to at least 50 hours, while oxygen permeability decreased only slightly by around 5%. The improved stability could be attributed to stronger Mn⁴⁺–O bonds, which help to preserve the crystal structure under reducing conditions. Overall, the material demonstrates significantly more robust performance and emerges as a promising candidate for CO₂ conversion processes that use hydrogen as a reactant.

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Rashid, Aasir; Thiem, Moritz; Wellmann, Merle; Bresser, Marc; Lindemann, Olaf; Wiegers, Katharina-Sophia; Hofmann, Jan Philipp; Schulz, Andreas; Feldhoff, Armin; Weidenkaff, Anke; Widenmeyer, Marc (2025): Enhancing the hydrogen tolerance of La0.6Ca0.4Co0.2Fe0.8O3-d oxygen transport membranes with the substitution of 10 % Mn at the B site for plasma assisted CO2 conversion. In: Open Ceramics, 22, DOI: 10.1016/j.oceram.2025.100781