High Sintering Resistance of Size-Selected Platinum Cluster Catalysts by Suppressed Ostwald Ripening
Artikel i vetenskaplig tidskrift, 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
Författare
Kristina Wettergren
Chalmers, Teknisk fysik, Kemisk fysik
F. F. Schweinberger
Technische Universität München
D. Deiana
Danmarks Tekniske Universitet (DTU)
C. J. Ridge
Technische Universität München
A. S. Crampton
Technische Universität München
M. D. Rotzer
Technische Universität München
T. W. Hansen
Danmarks Tekniske Universitet (DTU)
V. P. Zhdanov
Chalmers, Fysik
Russian Academy of Sciences
U. Heiz
Technische Universität München
Christoph Langhammer
Chalmers, Teknisk fysik, Kemisk fysik
Nano Letters
1530-6984 (ISSN) 1530-6992 (eISSN)
Vol. 14 10 5803-5809Ämneskategorier
Annan fysik
Nanoteknik
DOI
10.1021/nl502686u