Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 81: Catalysis and surface reactions II

O 81.4: Talk

Thursday, March 12, 2026, 11:15–11:30, TRE/MATH

Adsorption of CO and CO₂ on MgO(100) single-crystal surfaces investigated by polarization-resolved IRRAS — •Wangtao Li, Zairan Yu, Alexei Nefedov, Christof Wöll, and Yuemin Wang — Institue of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany

MgO, a low-cost alkaline metal oxide material, is widely used in heterogeneous catalysis. Comprehensive understanding of MgO-based catalysts requires reliable reference data from surface science studies on MgO model systems. Here, we present polarization-resolved reflection absorption spectroscopy (IRRAS) data obtained for CO and CO₂ adsorption on MgO(100) single-crystal surfaces using a sophisticated UHV apparatus (THEO). The low-temperature (67 K) and temperature-dependent IRRAS results provide deep insights into the interaction of CO and CO₂ with MgO(100). The p- and s-polarized IRRAS data enable detailed analysis of vibrational frequencies, adsorption configurations, and binding energies of different species bound to distinct surface sites including defects. This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 426888090 - SFB 1441.

Keywords: MgO; IR spectroscopy; Single crystals; IRRAS; Heterogeneous catalysis