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O: Fachverband Oberflächenphysik
O 11: Surface Reactions
O 11.4: Talk
Monday, March 27, 2023, 15:45–16:00, CHE 91
Fischer-Tropsch synthesis on magnetite (111) surface — •Heshmat Noei1, Robert Gleißner1, Michael Wagstaffe1, Christopher Goodwin2, Markus Soldemo2, Mikhail Shipilin2, Patrick Lömker2, Christoph Schlueter3, Peter Amann2, and Andreas Stierle1 — 1Centre for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany — 2Stockholm Universitet, Department of Physics, Roslagstullsbacken 21, 10691 Stockholm, Sweden — 3Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
Magnetite (Fe3O4) is an important and diverse transition metal oxide with applications in catalysis, data storage and biomedical imaging. In this contribution, we demonstrate an operando Fischer-Tropsch synthesis with a focus on product detection on the magnetite (111) surface and clarify the reaction mechanism and intermediates applying state of the art ambient pressure XPS with ability to measure photoemission spectra 76 at above 1 bar using hard X-ray at PETRA III beamline at DESY in Hamburg and clarify the mechanism of FT synthesis by monitoring reaction products operando on single crystal Fe3O4. We show then the dominant product from FT synthesis is a methoxy species and short chain alkanes under our reaction conditions (500 mbar, 400∘C) and that no aldehydes and ketones are formed during reaction.