August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【214】Comparison of single Rh adatoms on α-Fe2O3(1-102) and TiO2(110) stabilized by adsorbed water

Aug 31, 2021, 5:15 PM
Room C

Room C

Talk Surfaces, Interfaces and Thin Films Surfaces, Interfaces and Thin Films


Lena Haager (TU Wien)


Despite its high cost, rhodium is a widely applied catalyst. So-called single-atom catalysis offers an opportunity to reduce the amount of Rh required for traditional heterogeneous catalysis, and a path to heterogenize homogeneous reactions.

Using STM, nc-AFM and XPS we compare the stability of Rh adatoms on two different model supports: $\alpha$-Fe$_{2}$O$_{3}(1\overline{1}02)$ and TiO$_{2}$(110), both after metal deposition in UHV and in a $2*10^{-8}$ mbar water background. We show that the Rh adatoms on $\alpha$-Fe$_{2}$O$_{3}(1\overline{1}02)$ sinter in UHV, but are stabilized by water up to 150 °C through coordination to 2$-$3 OH ligands. In contrast, Rh adatoms on TiO$_{2}$(110) could not be stabilized above room temperature.

Primary author

Lena Haager (TU Wien)


Mr Florian Kraushofer (TU Wien) Mr Moritz Eder (TU München) Mr Ali Rafsanjani-Abbasi (TU Wien) Dr Giada Franceschi (TU Wien) Dr Michele Riva (TU Wien) Mr Panukorn Sombut (TU Wien) Mrs Atzmüller Marlene (TU Wien) Prof. Michael Schmid (TU Wien) Prof. Cesare Franchini (Universitá di Bologna) Prof. Ulrike Diebold (TU Wien) Prof. Gareth S. Parkinson (TU Wien)

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