Transient Surface Degradation of LSCO and LSFO during OER in Alkaline Electrolyte under Dynamic Cycling Conditions

Published 25 July 2025

Understanding the link between activity and stability is essential for optimizing oxygen evolution reaction (OER) catalysts. Our comparison of La_0.6Sr_0.4CoO_3−δ (LSCO) and La_0.6Sr_0.4FeO_3−δ (LSFO) reveals distinct degradation mechanisms, with surface passivation for LSFO and bulk degradation for LSCO, highlighting the impact of the transition metal on degradation behavior and the loss of hybrid electronic states over time.

Autors: Anton Kaus, Bixian Ying, Zhenjie Teng, Muzaffar Maksumov, Lisa Heymann, Michael Merz, Stefan Schuppler, Peter Nagel, Florian Hausen, Karin Kleiner, Felix Gunkel

ACS Catalysis volume 15, 13768-13777 https://doi.org/10.1021/acscatal.5c02273

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Dr. Felix Gunkel