SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 28: Organic Molecules on Inorganic Substrates III: Adsorption and Growth I
O 28.5: Vortrag
Dienstag, 28. März 2023, 11:30–11:45, CHE 89
Adsorption and thermal stability of phenyl phosphonic acid on cerium oxide: effect of surface morphology, stoichiometry and composition. — •Viacheslav Kalinovych1, Lesia Piliai1, Yuliia Kosto1, Sascha L. Mehl2, Tomáš Skála1, Iva Matolinová1, Vladimír Matolín1, Kevin C. Prince2, and Nataliya Tsud1 — 1Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic — 2Elettra-Sincrotrone Trieste S.C.p.A., in Area Science Park, Strada Statale 14, km 163.5, Basovizza (Trieste), 34149, Italy
In the present work, the binding properties and thermal stability of the phosphonate group to several well-ordered cerium oxide systems: stoichiometric CeO2(111), fully reduced Ce2O3(111), Ce6WO12(100) and polycrystalline RF CeO2 were studied. Phenyl phosphonic acid (PPA) has been chosen as a molecule consisting of a phosphonate group and a benzene ring. PPA deposition was performed in UHV conditions. The binding properties and thermal stability has been investigated in the range of 25-450 °C by synchrotron radiation photoelectron spectroscopy, resonant photoelectron spectroscopy and near-edge X-ray absorption fine structure spectroscopy. This work comprehensively describes the phosphonate group binding to cerium oxide as a function of substrate morphology, stoichiometry, composition and temperature.