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

Kristina Wettergren; Florian F. Schweinberger; Davide Deiana; Claron J. Ridge; Andrew S. Crampton; Marian D. Rötzer; Thomas W. Hansen; Vladimir P. Zhdanov; Ueli Heiz; Christoph Langhammer

doi:10.1021/nl502686u

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

Kristina Wettergren, Florian F. Schweinberger, Davide Deiana, Claron J. Ridge, Andrew S. Crampton, Marian D. Rötzer, Thomas W. Hansen, Vladimir P. Zhdanov, Ueli Heiz, Christoph Langhammer

Chair of Physical Chemistry

Research output: Contribution to journal › Article › peer-review

142 Scopus citations

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.

Original language	English
Pages (from-to)	5803-5809
Number of pages	7
Journal	Nano Letters
Volume	14
Issue number	10
DOIs	https://doi.org/10.1021/nl502686u
State	Published - 8 Oct 2014

Keywords

indirect nanoplasmonic sensing
Ostwald ripening
platinum
sintering resistance
Size-selected clusters

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10.1021/nl502686u

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title = "High sintering resistance of size-selected platinum cluster catalysts by suppressed ostwald ripening",

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.",

keywords = "indirect nanoplasmonic sensing, Ostwald ripening, platinum, sintering resistance, Size-selected clusters",

author = "Kristina Wettergren and Schweinberger, {Florian F.} and Davide Deiana and Ridge, {Claron J.} and Crampton, {Andrew S.} and R{\"o}tzer, {Marian D.} and Hansen, {Thomas W.} and Zhdanov, {Vladimir P.} and Ueli Heiz and Christoph Langhammer",

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doi = "10.1021/nl502686u",

language = "English",

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T1 - High sintering resistance of size-selected platinum cluster catalysts by suppressed ostwald ripening

AU - Wettergren, Kristina

AU - Schweinberger, Florian F.

AU - Deiana, Davide

AU - Ridge, Claron J.

AU - Crampton, Andrew S.

AU - Rötzer, Marian D.

AU - Hansen, Thomas W.

AU - Zhdanov, Vladimir P.

AU - Heiz, Ueli

AU - Langhammer, Christoph

PY - 2014/10/8

Y1 - 2014/10/8

N2 - 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.

AB - 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.

KW - indirect nanoplasmonic sensing

KW - Ostwald ripening

KW - platinum

KW - sintering resistance

KW - Size-selected clusters

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U2 - 10.1021/nl502686u

DO - 10.1021/nl502686u

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SP - 5803

EP - 5809

JO - Nano Letters

JF - Nano Letters

IS - 10

ER -

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

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Keywords

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