Stephan Pollitt

My current fields of research are ligand stabilized mono-, bimetallic and trimetallic nanoclusters , supported on oxides for heterogeneous catalysis processes. From the synthesis, characterization to the catalytic studies.

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

8. The Dynamic Structure of Au38(SR)24 Nanoclusters Supported on CeO2 upon Pretreatment and CO Oxidation
Stephan Pollitt, Vera Truttmann,Thomas Haunold, Clara Garcia, Wojciech Olszewski, Jordi Llorca,  Noelia Barrabés*,  Günther Rupprechter
ACS Catalysis (2020) 1011, 6144-6148 https:// 10.1021/acs.jpcc.0c06858

7. Determining and Controlling Cu-Substitution Sites in Thiolate-Protected Gold-Based 25-Atom Alloy Nanoclusters
S.Hossain, D.Daiki, T.Iwasa, R.Kaneko, T.Suzuki, S.Miyajima, Y.Iwamatsu, S.Pollitt, T.Kawawaki, N.Barrabés, G.Rupprechter, Y.Negishi*
The Journal of Physical Chemistry C (2020) 124, 40 https:// 10.1021/acs.jpcc.0c06858

6.Evaluation of the silver species nature in Ag-zeolites by the CO oxidation reaction
I. López-Hernández , C. García, V. Truttmann, S. Pollitt, N. Barrabés, G. Rupprechter, F. Rey, A. E. Palomares
Catalysis Today(2020) 345, 22-26 https://doi.org/10.1016/j.catcom.2019.105768

5.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 Linden, V.Truttmann, Ch.Rameshan, R. Rameshan, E.Pittenauer, G.Allmaier, P. Kregsamer, M.Stöger-Pollach, N.Barrabés*, G.Rupprechter,
Catalysis Today (2019) 336, 174-185 [OA]DOI:https://doi.org/10.1016/j.cattod.2018.12.013

4.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, 
Physical Chemistry Chemical Physics (2018) 20, 5312-5318 DOI:10.1039/C7CP08272J

3.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) 10, 5372-5376
DOI: doi.org/10.1002/cctc.201801474 ; https://doi.org/10.1002/cctc.201801474

2.Structural Investigation of the Ligand Exchange Reaction with Rigid Dithiol on Doped (Pt, Pd) Au25Clusters
A.Sels, G. Salassa, S. Pollitt, C. Guglieri, G. Rupprechter, N. Barrabés*, T. Bürgi* 
Journal of Physical Chemistry C (2017) 121(20), 10919-10926 (invited paper) DOI: 10.1021/acs.jpcc.6b12066

1.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) 121(20), 10948-10956 DOI: 10.1021/acs.jpcc.6b12076

Awards

PCCP award of the best poster presentation at the European Conference on Catalysis (Europacat 2017) in Florence (Italy)

Conference Contributions

Oral Communications

Posters