Regensburg 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 82: Fundamentals of Catalysis II
O 82.8: Vortrag
Donnerstag, 4. April 2019, 16:45–17:00, H5
Adsorption and Interfacial Reactions of 2H-Tetraphenylporphyrin on Cobalt Oxide Thin Films — •Daniel Wechsler1, Cynthia Fernández2, Quratulain Tariq1, Nataliya Tsud3, Kevin Prince3,4, Federico Williams2, Hans-Peter Steinrück1, and Ole Lytken1 — 1Chair of Physical Chemistry II, University Erlangen-Nürnberg, 91058 Erlangen, Egerlandstraße 3, Germany — 2Department of Inorganic, Analytical and Physical Chemistry, University of Buenos Aires, Buenos Aires C1428EHA, Argentina — 3Elettra-Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza-Trieste, Italy — 4IOM, Strada Statale 14, km 163.5, 34149 Basovizza-Trieste, Italy
Understanding the interactions between organic molecules and metal-oxide surfaces plays an important role in many nanotechnology devices.
We have studied the adsorption and interfacial reactions of 2H-tetraphenylporphyrin (2HTPP) with synchrotron-radiation X-ray photoelectron spectroscopy on cobalt- and oxygen-terminated Co3O4 and CoO cobalt-oxide thin films. Already at 175 K, we find evidence for the formation of a metalated species, most likely CoTPP, on both surfaces. The degree of metalation increases with temperature on both surfaces until 575 K, at which point desorption is observed from the reducible cobalt-terminated Co3O4 oxide, while decomposition is observed on the non-reducible oxygen-terminated CoO oxide.
The project is supported by the DFG trough FOR 1878 (funCOS).