Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 3: Focus Session: Single Atom Catalysis 1
O 3.8: Vortrag
Montag, 5. September 2022, 12:30–12:45, H4
Comparison of Single Metal Atoms on a Fe2O3 Model Support — •Gareth Parkinson1, Ali Rafsanjani-Abbasi1, lena Puntscher1, Florian Kraushofer1, Panukorn Sombut1, Chunlei Wang1, Matthias Meier1,2, Moritz Eder1, Jiri Pavelec1, Giada Franceschi1, Michele Riva1, Michael Schmid1, Cesare Franchini2,3, and Ulrike Diebold1 — 1TU Wien, Vienna, Austria — 2University of Vienna, Vienna, Austria — 3Università di Bologna, Bologna, Italy
Understanding how the local environment of a "single-atom" catalyst affects stability and reactivity remains a significant challenge. Fe2O3 is the most common iron-oxide support material utilized for SAC, but little is known about how metal adatoms bind at its surfaces. In this talk, I will compare and contrast the behavior of Pt, Rh, and Ir atoms on the flat, well-ordered (1x1) termination of Fe2O3(1-102). Using a combination of scanning probe microscopy and spectroscopic data, as well as theoretical calculations, I will demonstrate significant differences between the adsorption site and thermal stability of the metals, as well as differences in their interaction with water and CO.