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O: Fachverband Oberflächenphysik
O 12: Nanostructures at Surfaces I
O 12.3: Vortrag
Montag, 17. März 2025, 15:30–15:45, H6
Influence of Plasma on the Electrode and the Electrolyte during Plasma Electrolysis — •Lukas Forschner1, Jan-Luca Gembus2, Peter Awakowicz2, Andrew R. Gibson3, Timo Jacob1, and Albert K. Engstfeld1 — 1Ulm University, Institute of Electrochemistry, Ulm, Germany — 2Ruhr University Bochum, Chair of Applied Electrodynamics and Plasma Technology, Bochum, Germany — 3University of York, York Plasma Institute, Heslington, United Kingdom
During plasma electrolysis, a plasma is ignited in a thin vapor layer between the powered electrode and the liquid electrolyte. The plasma interacts with both the electrode[1] and the electrolyte, which can modify their properties.[2] In this work, we focus on a metal electrode used as a cathode, where nanoparticle formation can be observed during plasma electrolysis. To gain fundamental insight into nanoparticle formation, we studied the gas sheath surrounding the electrode (including the plasma) and the respective interfaces in detail. Specifically, we use optical emission spectroscopy and high-speed camera imaging to analyze the processes on a milli- to microsecond time scale. We elucidate the structural changes on the electrode induced by the plasma under these conditions with scanning electron microscopy imaging. Based on these results, we discuss mechanisms leading to the formation of nanoparticles in the solution from the electrode.
[1] Artmann et al., ChemPhysChem 22 (2021) 2429.
[2] Forschner et al. J. Phys. Chem. C 127 (2023) 4394.
Keywords: Plasma; Electrolysis; Nanoparticles