Fuchs, TimoBriega-Martos, ValentínFehrs, Jan O.Qiu, CanrongMirolo, MartaYuan, ChentianCherevko, SerhiyDrnec, JakubMagnussen, Olaf M.Harrington, David A.2023-04-1420232023-04-05Fuchs, T., Briega-Martos, V., Fehrs, J. O., Qiu, C., Mirolo, M., Yuan, C., Cherevko, S., Drnec, J., Magnussen, O. M., & Harrington, D. A. (2023). Driving Force of the Initial Step in Electrochemical Pt(111) Oxidation. The Journal of Physical Chemistry Letters, 3589–3593. https://doi.org/10.1021/acs.jpclett.3c00520https://doi.org/10.1021/acs.jpclett.3c00520http://hdl.handle.net/1828/14950The first step of electrochemical surface oxidation is extraction of a metal atom from its lattice site to a location in a growing oxide. Here we show by fast simultaneous electrochemical and in situ high-energy surface X-ray diffraction measurements that the initial extraction of Pt atoms from Pt(111) is a fast, potential-driven process, whereas charge transfer for the related formation of adsorbed oxygen-containing species occurs on a much slower time scale and is evidently uncoupled from the extraction process. It is concluded that potential plays a key independent role in electrochemical surface oxidation.enExtractionOxidationOxygenPlatinumSeparation scienceArticleDepartment of Chemistry