In-Operando Friction Force Microscopy Reveals Degradation and Repassivation of Epitaxial Perovskites During Oxygen Evolution Reaction Under Dynamic Cycling Conditions

Published: January 28, 2026

In this study led by Muzaffar Maksumov (IET-1), we applied in-operando friction force microscopy during cyclic voltammetry in alkaline electrolyte to track how epitaxial perovskite OER catalysts evolve. By mapping topography and friction simultaneously, we show that friction is a particularly sensitive probe of interfacial reorganization and we quantify material-dependent repassivation during cycling. Across LSCO, LSFO, and LSMO, distinct surface-evolution pathways are revealed—ranging from soft, tip-displaceable adlayers to a thick particulate-rich passivation layer—highlighting how different perovskite oxides degrade under dynamic cycling conditions.

Journal: ChemElectroChem volume 13, e202500426
Autor: Muzaffar Maksumov, Anton Kaus, Karin Kleiner, Felix Gunkel, Rüdiger-A. Eichel, Florian Hausen
DOI: https://doi.org/10.1002/celc.202500426

Contact

Dr. Felix Gunkel

Senior Researcher / Group leader Associate Professor, University of Twente (Guest @ IMS)

• Peter Grünberg Institute (PGI)
• Electronic Materials (PGI-7)

Building 04.6 /
Room 51

+49 2461/61-5339

E-Mail