[Zurück]

C. Garcia Yago, N. Barrabés-Rabanal, G. Rupprechter:
"Pd DOPING EFFECT ON THE CATALYTIC PROPERTIES OF GOLD NANOCLUSTERS SUPPORTED ON OXIDES";
in: "Vienna Young Scientists Symposium", Book-of-Abstracts.com / D.I. Krebs, Gumpoldskirchen, 2019, ISBN: 978-3-9504017-9-0, S. 114 - 115.

Atomically designed metal clusters offer the possibility to design well-defined and truly
homogeneous surfaces leading to optimal catalysts for reaction mechanism studies. Thiolateprotected
metal clusters supported on metal oxides have been shown enhanced catalytic activity in
several reaction processes, both in liquid phase and gas phase
[1]. These structures can be tuned by different strategies:
modifying the ligands (ligand exchange reactions), by size
(variating the synthetic procedure) or by heteroatom doping
(variating the metal composition). In the case of Au25(SR)18
clusters, Pd have a preferential position in the core centre,
leading to an increase in stability and reactivity [2,3]. Previously
we studied the effect of support and nanocluster size on the
catalytic properties in liquid phase oxidation reactions
(cyclohexane oxidation) [4,5]. Clear influence was observed,
related with the cluster stability. Therefore, we further
investigate the effect of Pd doping in the cluster structure
stability under pretreatment and reaction conditions, in addition
to the catalytic properties.