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.

platinum

sintering resistance

Size-selected clusters

Ostwald ripening

sintering

indirect nanoplasmonic sensing

Author

Kristina Wettergren

Chalmers, Applied Physics, Chemical Physics

F. F. Schweinberger

D. Deiana

C. J. Ridge

A. S. Crampton

M. D. Rotzer

T. W. Hansen

V. P. Zhdanov

U. Heiz

Christoph Langhammer

Chalmers, Applied Physics, Chemical Physics

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 14 10 5803-5809

Subject Categories

Other Physics Topics

Nano Technology

DOI

10.1021/n1502686u

More information

Created

10/6/2017