Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 10: Focus Session: Single Atom Catalysis 2

O 10.2: Vortrag

Montag, 5. September 2022, 15:30–15:45, H4

Synthesis of single-atom model catalysts via atomic layer deposition for CO oxidation — •Chunlei Wang¹, Hélois Tissot¹, Joakim Halldin Stenlid², Markus Soldemo¹, Sarp Kaya³, and Jonas Weissenrieder¹ — ¹Materials and Nano Physics, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden — ²Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden — ³Department of Chemistry, Koc University, 34450 Istanbul, Turkey

Single-atom model catalysts, with individual metal atoms anchored on well-defined single crystals under ultra-high vacuum conditions, can provide an atomic-scale insight into active sites and reaction mechanisms for applied catalysis, thus promoting the design of better industrial catalysts. The metal growth of model catalyst is usually synthesized by physical vapor deposition method. Here, we applied a novel atomic layer deposition strategy to model systems for the synthesis of single-atom Fe1Ox catalysts on Cu2O(100) and Pt(111). The coordination configuration was determined through a combination of scanning tunneling microscopy, synchrotron radiation X-ray photoelectron spectroscopy (XPS), and density functional theory calculations. The redox properties of single atoms were investigated using ambient-pressure XPS under mbar level of reactant gas.