Team

Stephan

STEPHAN POLLITT, DI, Bsc.                                                                       PhD student                                                     stephan.pollitt@tuwien.ac.at

My current fields of research are ligand stabilized mono- and bimetallic nanoclusters in heterogeneous catalysis from the synthesis to the characterization.

Keywords: Heterogeneous Catalysis, Metal Clusters, Surface Science, Solid State Chemistry, Spectroscopy, XAFS, ATR-FTIR, XPS, Powder X-Ray Diffraction, Single Crystal X-Ray Diffraction, Residual Stress Measurements, Rietveld Refinement, Crystallite Size Determination (X-Ray).

Master Thesis: Synthesis and characterization of Cox(SR)m and CoxAu25-x(SR)m clusters catalysts

Publications

Support effect on the reactivity and stability of Au25(SR)18 and Au144(SR)60 nanoclusters in liquid phase cyclohexane oxidation
C.García, S.Pollitt., M. van der Linde, V.Truttmann., M. Stöger-Pollarch, N.Barrabés*, G.Rupprechter Catalysis Today (2018) under revision

Ligand migration from cluster to support: A crucial factor for catalysis by thiolate-protected gold clusters
B. Zhang, A.Sels, G.Salassa, S.Pollitt., V.Truttmann., C.Rameshan., J.Llorca, W.Olszewski, G.Rupprechter, T.Bürgi and N.Barrabés, ChemCatChem (2018) in press

On the mechanism rapid metal exchange between thiolate-protected gold and gold/silver clusters: a time-resolved in situ XAFS study. 
B. Zhang*,  O.V. Safonova, S. Pollitt, G. Salassa, A.Sels, R.Kazan, Y.Wang, G. Rupprechter, N. Barrabés*, and T. Bürgi, PCCP 2018

Synthesis and Properties of Monolayer-Protected Cox(SC2H4Ph)m Nanoclusters 
S.Pollitt, E.Pittenauer, C.Rameshan, T. Schachinger, Safonova O.V., Truttmann V., Bera A., Allmaier G., Barrabes N., Rupprechter G. , J. Phys. Chem. C 2017

Structural Investigation of the Ligand Exchange Reaction with Rigid Dithiol on Doped (Pt, Pd) Au25 Clusters
A.Sels A., Salassa G., Pollitt S., Guglieri C., Rupprechter G., Barrabes N., Buergi T., J. Phys. Chem. C 2017

Vera

 

VERA TRUTTMANN, DI, BSc.                                                                        PhD student                                                        vera.truttmann@gmail.com

My current research focuses on Au-nanoclusters, which are protected by different kinds of ligands (thiols, phosphines, alkynes).This ranges from synthesis to characterisation and testing their catalytic activity in model reactions.

Keywords: Homogeneous/Heterogeneous Catalysis, Metal Clusters, Inorganic Chemistry, Surface Science, Asymmetric Synthesis, XAFS, FTIR, Raman, XPS.

Master Thesis: Ligand Exchange Reactions of Au Nanoclusters (Awarded by GÖCH and StadtWien)

Publications

Support effect on the reactivity and stability of Au25(SR)18 and Au144(SR)60 nanoclusters in liquid phase cyclohexane oxidation
C.García, S.Pollitt., M. van der Linde, V.Truttmann., M. Stöger-Pollarch, N.Barrabés*, G.Rupprechter Catalysis Today (2018) under revision

Ligand migration from cluster to support: A crucial factor for catalysis by thiolate-protected gold clusters
B. Zhang, A.Sels, G.Salassa, S.Pollitt., V.Truttmann., C.Rameshan., J.Llorca, W.Olszewski, G.Rupprechter, T.Bürgi and N.Barrabés, ChemCatChem (2018) in press

Synthesis and Properties of Monolayer-Protected Cox(SC2H4Ph)m Nanoclusters 
S.Pollitt, E.Pittenauer, C.Rameshan, T. Schachinger, Safonova O.V., Truttmann V., Bera A., Allmaier G., Barrabes N., Rupprechter G. , J. Phys. Chem. C 2017



DSCN0064

 

CLARA ISABEL GARCIA, MSc.                                                             PhD student                                                           clara.yago@tuwien.ac.at

 

My current research focuses on understanding the cluster-surface interaction and its effect on the catalytic activity. I am studying several cluster sizes (from Au25 to Au144), with different structure and staple configuration, supported on different oxides materials (TiO2, SiO2, ZrO2, Carbon…)  for alcohol oxidation reactions.

Keywords:  Heterogeneous Catalysis, Metal Clusters,  Surface Science, Oxidation, liquid phase, Synthesis, XAFS, FTIR.

Publications

Support effect on the reactivity and stability of Au25(SR)18 and Au144(SR)60 nanoclusters in liquid phase cyclohexane oxidation
C.García, S.Pollitt., M. van der Linde, V.Truttmann., M. Stöger-Pollarch, N.Barrabés*, G.Rupprechter Catalysis Today (2018) under revision

Noelia Barrabés