Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 84: Poster Focus Session: Structure and Chemistry of Metal-Oxide Surfaces

O 84.8: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

FeO(111) islands on Ru(0001): A potential catalyst for the CO oxidation reaction — •Natalia Michalak^1,2, Zygmunt Milosz¹, Stefan Jurga¹, and Mikolaj Lewandowski¹ — ¹NanoBioMedical Centre, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland — ²Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznan, Poland

Oxide films epitaxially grown on metal single crystal surfaces are widely used as model catalysts that allow deeper understanding of processes that occur on the surfaces of bulk oxide catalysts. We studied ultrathin FeO(111) islands epitaxially grown on Ru(0001) by room temperature iron deposition and post-oxidation in molecular oxygen. Such preparation leads to the formation of well-dispersed and well-ordered FeO(111) islands the size of which can be tuned by additional UHV annealing. Scanning tunneling microscopy (STM) operating in dI/dV mapping mode revealed the presence of potentially catalytically-active coordinatively unsaturated ferrous sites (CUFs) at the perimeter of the FeO islands and within the islands. The results indicate that FeO(111)/Ru(0001) can be a promising catalytic system for the CO oxidation reaction. Acknowledgement: This work was financially supported by the National Science Centre of Poland (PRELUDIUM project No. 2016/21/N/ST4/00302).