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Talks and Poster Presentations (with Proceedings-Entry):

C. Garcia Yago, N. Barrabés-Rabanal, G. Rupprechter:
"Cluster-support interaction study: effect of cluster size and oxide material under oxidation processes";
Poster: ISMPC17: International Symposium on Monolayer Protected Clusters, Monte Verita, Switzerland; 08-13-2017 - 08-16-2017; in: "ISMPC17: International Symposium on Monolayer Protected Clusters", (2017).



English abstract:
Atomically designed metal clusters offer the possibility to design well-defined and truly homogeneous surfaces leading to optimal catalysts for reaction mechanism studies. Although, the stability of the cluster structure and type of interaction with the support during the thiolate ligands removal treatments and under reaction conditions represent key understanding for their catalytic application. In previous work, it was observed strong effect of the different support materials and the pre-treatments in their stability and catalytic activity [1]. The stability of the supported cluster is related with the interaction with the oxide depending on the ligands configuration, structure and oxide nature.

Therefore, an in-depth investigation of the effect of the cluster size (Au25 vs Au144), the staple configuration (short vs long staple) and the ligand interactions depending on the material support nature is the focused on the present work. The interaction and stability of Au25(SC2H4Ph)18 and Au144(SC2H4Ph)60 clusters with different oxide materials (SiO2, TiO2 and ZrO2) have been studied by (UV-Vis. FTIR, XRD, HRTEM and XAFS). Different stability of the cluster is observed depending on the cluster size (structure-ligands configuration) and the oxide material.

References
[1] Zhang, B.; Kaziz, S.; Li H.; Hevia, M.G.; Wodka, D.; Mazet, C.; Bürgi, T.; Barrabés, N. J. Phys.Chem. C. 2015, 119, 11193


Electronic version of the publication:
http://publik.tuwien.ac.at/files/publik_267046.pptx


Created from the Publication Database of the Vienna University of Technology.