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O: Fachverband Oberflächenphysik

O 65: Solid-Liquid Interfaces: Reactions and Electrochemistry III

O 65.2: Vortrag

Mittwoch, 19. März 2025, 15:15–15:30, H6

Au(111) in the Ionic Liquid [MPPip][TFSI]: Corrosion, Reconstruction and Other Surface Restructuring Phenomena — •Maren-Kathrin Heubach¹ and Timo Jacob^1,2,3 — ¹Institute of Electrochemistry, Ulm University, Ulm, Germany. — ²Helmholtz-Institute-Ulm (HIU), Ulm, Germany. — ³Karlsruhe Institute of Technology, Karlsruhe, Germany.

In fundamental electrochemistry, Au single-crystals are a good benchmarking standard because of the ease of their preparation and high chemical stability.[1-4] Nevertheless, the morphological stability of Au under measurement conditions is rather limited. In this study, we utilize in situ scanning tunnelling microscopy (STM) to investigate the stability of a Au(111) electrode in the ionic liquid N-methyl-N-propylpiperidinium bis(trifluoromethane)sulfonimide ([MPPip][TFSI]). We will provide an overview of the observed surface structures and the corresponding potential ranges in which they remain stable.

[1] J. M. Hermann, et al. Electrochim Acta 2020, 347, 136287. [2] M.-K. Heubach, et al. ChemElectroChem 2022, 9, e202200722. [3] X. Hu, et al. Sci. Bull. (Beijing) 2015, 60, 877-883. [4] L. A. Kibler, et al. in Encyclopedia of Solid-Liquid Interfaces, Elsevier, 2024, pp. 426-449.

Keywords: Ionic Liquid; Scanning Tunnelling Microscopy; Corrosion; Reconstruction; Stability