Dresden 2026 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 16: Thin Film Application

DS 16.10: Vortrag

Donnerstag, 12. März 2026, 12:15–12:30, REC/C213

Influence of Crystal Orientation on the Oxygen Evolution Reaction in La₂NiMnO₆ Films — •Felix Tegtmeyer¹, Pia Henning², Shagun Thakur², Tobias Meyer², Ulrich Ross³, Vasily Moshnyaga⁴, and Jasnamol Palakkal² — ¹Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany — ²Institute of Materials Physics, University of Göttingen, Germany — ³4th Physical Institute, University of Göttingen, Germany — ⁴1st Institute of Physics, University of Göttingen, Germany

Double perovskites such as La₂NiMnO₆ (LNMO) promise applications for catalysis in energy storage and conversion. However, investigations of the oxygen evolution reaction (OER) in LNMO remain limited to nanoparticles and powders while the effects of crystal orientation remain elusive. In this work, we study monocrystalline LNMO thin film catalysts grown by metalorganic aerosol deposition at ambient air. By controlling the facet which is in contact with the electrolyte, the influence of crystal orientation is identified. We found that the activity of LNMO films with (100) crystal orientation is enhanced by one order of magnitude compared to (111) oriented films. We attribute this to the availability of both Ni and Mn active sites for the (100) surface. Moreover, an overall enhancement of the activity is identified for higher thicknesses. In long-term chronoamperometry measurements, the LNMO film retains a high activity and excellent bulk stability while the degradation is limited to a surface-near region.

Keywords: Catalysis; Oxygen evolution reaction; Perovskite oxides; Thin films; Metalorganic aerosol deposition