Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 15: Solid-Liquid Interfaces 2: Structure and Spectroscopy
O 15.11: Vortrag
Montag, 5. September 2022, 17:45–18:00, S054
Electrochemical reflection anisotropy spectroscopy for time-resolved interface structures in aqueous and non-aqueous electrolytes — •Matthias M. May1,2, Margot Guidat1,2, Mario Löw2, Florian Keller2, Justus Leist2, and Jongmin Kim1,2 — 1Universität Tübingen, Institute of Physical and Theoretical Chemistry, Tübingen, Germany — 2Universität Ulm, Institute of Theoretical Chemistry, Ulm, Germany
The microscopic structure of electrochemical interfaces determines many properties that are decisive for the performance of applications in catalysis or batteries. Yet access to this solid--liquid interface at sufficient temporal and spatial resolution is challenging and limits the understanding of this complex interface. Electrochemical reflection anisotropy spectroscopy (RAS) is a powerful emerging tool in spectroelectrochemistry [1], which we apply to a number of systems relevant for energy and matter conversion. Here, we present initial results on InP and Au in aqueous systems as well as select post-Li battery systems. For InP, we can directly observe stability windows with respect to applied potentials and electrolyte composition. We highlight the potential and challenges of electrochemical RAS from a perspective of both computational and experimental spectroscopy.
[1] May and Sprik, New. J. Phys. 20 (2018) 033031.