SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 29: Supported Nanoclusters: Structure, Reactions and Catalysis
O 29.6: Vortrag
Dienstag, 28. März 2023, 11:45–12:00, CHE 91
Cu Nanoparticles on Vicinal and Basal ZnO as Model Catalysts for Methanol Synthesis — •Robert Gleißner1, 2, Simon Chung1, Esko Erik Beck1, 2, Guilherme D. L. Semione1, 2, Michael Wagstaffe1, Leon Jacobse1, Steffen Tober1, 2, Gökhan Gizer4, Christopher Goodwin3, Marcus Soldemo3, 6, Mikhail Shipilin1, 3, Patrick Lömker1, 3, Christoph Schlueter1, Peter Amann3, Olof Gutowski1, Ann-Christin Dippel1, Matthias Muntwiler5, Vedran Vonk1, Heshmat Noei1, and Andreas Stierle1, 2 — 1Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 2Universität Hamburg, Germany — 3University of Stockholm, Sweden — 4Helmholtz-Zentrum hereon, Gesthaacht, Germany — 5Paul-Scherrer Institut, Villingen, Switzerland — 6Stanford University, Stanford, USA
Over recent years, the vicinal ZnO(10-14) surface garnered increased scientific interest, as it combines a high density of surface steps with high stability. However, the role of vicinal ZnO in Cu/ZnO catalysts remained to be investigated. In this study, Cu nanoparticles were grown on vicinal and basal ZnO and studied by STM, LEED, SEM, and ambient pressure XPS, GIXRD, and XRR. On vicinal ZnO, the Cu nanoparticles show a high prevalence of stepped Cu facets, which are interesting for catalytic reactions. Our study elucidates the morphology of the Cu nanoparticles, their interplay with the ZnO support, their stability under oxidation/reduction conditions, and the prospects for improving the activity of Cu/ZnO-based catalysts for methanol synthesis.