Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 65: Solid-liquid interfaces: Reactions and electrochemistry II
O 65.12: Vortrag
Mittwoch, 11. März 2026, 17:45–18:00, TRE/PHYS
Electroreduction of Acetone on PtRu Model Catalysts — •Robert Hübsch1, Daniel Schauermann1, Pankaj Kumar Samal2, Jan Škvára2, Frederike Jäschke1, Lesia Piliai2, Tomáš Skála2, Nataliya Tsud2, Josef Mysliveček2, Olaf Brummel1, Yaroslava Lykhach1, and Jörg Libuda1 — 1Interface Research and Catalysis, ECRC, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany — 2Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic
The isopropanol/acetone system functions as an electrochemically active liquid organic hydrogen carrier (EC-LOHC). In this context, direct electrochemical charging is particularly attractive but requires highly active and selective catalysts. In this study, we investigated acetone reduction on well-defined PtRu model surface alloys. Our approach combined cyclic voltammetry (CV), ex-situ emersion synchrotron radiation photoelectron spectroscopy (SRPES), electrochemical infrared reflection absorption spectroscopy (EC-IRRAS), and differential electrochemical mass spectrometry (DEMS). The PtRu/Ru(0001) surface exhibits low intrinsic catalytic activity; but can be activated through a dealloying procedure. This treatment produces small Pt aggregates on a rough Ru support. In contrast, the PtRu/Ru(10 10) surface, characterized by a lower coordination number, does not require dealloying. Unlike Pt(110), which predominantly produces propane, the PtRu model catalysts selectively yield the target product isopropanol.
Keywords: Acetone Reduction; Model Electrocatalysis; PtRu Alloys; Selectivity; EC-LOHC