Speaker
Lena Haager
(TU Wien)
Description
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)
Co-authors
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)
