Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 24: Solid-liquid interfaces: Reactions and electrochemistry – Poster

O 24.2: Poster

Monday, March 9, 2026, 18:00–20:00, P2

Influence of electrolyte and electrode parameters on the current voltage characteristics during high voltage and plasma electrolysis — •Benjamin Schilling, Lukas Forschner, Justus Leist, Timo Jacob, and Albert K. Engstfled — Ulm University, Ulm, Germany

Electrolysis at gas evolving electrodes at high voltages, up to several hundreds of volts, leads to vivid bubble formation at the electrode, which ultimately leads to the ignition of a plasma in a gas sheath forming around the significantly smaller driving electrode. [1] Depending on the applied voltage, the approach can be used to tailor the electrodes structural properties or to modify the electrolyte, to form nanoparticles or generate H2O2. Systematic studies to elucidate the fundamental physical properties are still scarce [2], which are, however, highly relevant to understand the aforementioned changes on the electrode and electrolyte. In this work we focus on the influence of the electrolyte concentration and composition, voltage scan rate, working electrode geometry and material, electrode distance and electrolyte convection. The electrode structural properties are studied by SEM imaging, the dynamics of the gas film around the electrode are monitored using a high-speed camera and the temperature is proved locally by multiple temperature probes. By correlating these results, we discuss the parameters influencing the temporal changes of the system’s properties and their consequences for the application of high-voltage electrolysis. [1] Yerokhin et al., SURF COAT TECH 122 (1999) 73-93. [2] Forschner et al., J. Phys. D: Appl. Phys 58 (2025) 215204.

Keywords: high-voltage; electrolysis; plasma; SEM imaging; high-speed camera