High Sintering Resistance of Size-Selected Platinum Cluster Catalysts by Suppressed Ostwald Ripening
Journal article, 2014
Employing rationally designed model systems with precise atom-by-atom particle size control, we demonstrate by means of combining noninvasive in situ indirect nano-plasmonic sensing and ex situ scanning transmission electron microscopy that monomodal size-selected platinum cluster catalysts on different supports exhibit remarkable intrinsic sintering resistance even under reaction conditions. The observed stability is related to suppression of Oftwald ripening by elimination of its main driving force via size-selection. This study thus constitutes a general blueprint for the rational design of sintering resistant catalyst systems and for efficient experimental strategies to determine sintering mechanisms. Moreover, this is the first systematic experimental investigation of sintering processes in nanoparticle systems with an initially perfectly monomodal size distribution under ambient conditions.
Ostwald ripening
sintering resistance
sintering
platinum
Size-selected clusters
indirect nanoplasmonic sensing
Author
Kristina Wettergren
Chalmers, Applied Physics, Chemical Physics
F. F. Schweinberger
Technical University of Munich
D. Deiana
Technical University of Denmark (DTU)
C. J. Ridge
Technical University of Munich
A. S. Crampton
Technical University of Munich
M. D. Rotzer
Technical University of Munich
T. W. Hansen
Technical University of Denmark (DTU)
V. P. Zhdanov
Chalmers, Physics
Russian Academy of Sciences
U. Heiz
Technical University of Munich
Christoph Langhammer
Chalmers, Applied Physics, Chemical Physics
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 14 10 5803-5809Subject Categories
Other Physics Topics
Nano Technology
DOI
10.1021/nl502686u