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High sintering resistance of size-selected platinum cluster catalysts by suppressed ostwald ripening

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Authors:
  • Wettergren, Kristina ;
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    Chalmers University of Technology
  • Schweinberger, Florian F. ;
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    Technische Universität München
  • Deiana, Davide ;
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    Center for Electron Nanoscopy, Technical University of Denmark
  • Ridge, Claron J. ;
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    Technische Universität München
  • Crampton, Andrew S. ;
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    Technische Universität München
  • Rötzer, Marian D. ;
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    Technische Universität München
  • Hansen, Thomas Willum ;
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    Orcid logo0000-0002-1861-3054
    Center for Electron Nanoscopy, Technical University of Denmark
  • Zhdanov, Vladimir P. ;
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    Chalmers University of Technology
  • Heiz, Ueli ;
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    Technische Universität München
  • Langhammer, Christoph
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    Chalmers University of Technology
DOI:
10.1021/nl502686u
Abstract:
Employing rationally designed model systems with precise atom-by-atom particle size control, we demonstrate by means of combining noninvasive in situ indirect nanoplasmonic 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 Ostwald 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.
Type:
Journal article
Language:
English
Published in:
Nano Letters, 2014, Vol 14, Issue 10, p. 5803-5809
Keywords:
Indirect nanoplasmonic sensing; Ostwald ripening; Sintering resistance; Size-selected clusters; Platinum
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2014
Scientific Level:
Scientific
ID:
270706619

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