Regensburg 2025 – scientific programme

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O: Fachverband Oberflächenphysik

O 27: Solid-Liquid Interfaces: Reactions and Electrochemistry I

O 27.7: Invited Talk

Tuesday, March 18, 2025, 12:00–12:30, H4

Ultrafast electrochemistry beyond the RC time constant — •Yujin Tong — Universität Duisburg-Essen, Duisburg

Electrochemistry relies on charge transfer, which can occur on time scales from femtoseconds to seconds or longer. Traditional electrochemical detection methods are limited in their ability to study ultrafast processes such as solvent reorganization and electron tunneling. This presentation focuses on the advancements and challenges in ultrafast electrochemistry, specifically exploring processes occurring on timescales shorter than the RC time constant. Traditional electrochemical processes have typically been studied over longer timescales, often constrained by limitations in mass diffusion and hardware capabilities. However, recent developments in ultrafast laser technology and femtochemistry have enabled the observation of rapid processes with femto /pico second time resolution at electrochemical interfaces, such as ultrafast potential relaxation in electric double layers and the dynamics of solvated electrons [1-3]. [1] G. Zwaschka, F. Lapointe, R. K. Campen, Y. Tong, Curr. Opin. Electrochem. 29, 100813 (2021) [2] F. Lapointe, M. Wolf, R. K. Campen, Y. Tong, J. Am. Chem. Soc. 142, 18619-18627 (2020) [3] Z. Huang, M. Bridger, O. A. Naranjo-Montoya, A. Tarasevitch, U. Bovensiepen, Y. Tong, R. K. Campen, arXiv preprint, doi: 10.48550/arXiv.2304.06684 (2023)

Keywords: Electrochemistry; RC time constant; Ultrafast processes; Solvated electron; femto-electrochemistry