High Sintering Resistance of Size-Selected Platinum Cluster Catalysts by Suppressed Ostwald Ripening

被引：144

作者：

Wettergren, Kristina ^{[1
]}

Schweinberger, Florian F. ^{[2
,3
]}

Deiana, Davide ^{[4
]}

Ridge, Claron J. ^{[2
,3
]}

Crampton, Andrew S. ^{[2
,3
]}

Roetzer, Marian D. ^{[2
,3
]}

Hansen, Thomas W. ^{[4
]}

Zhdanov, Vladimir P. ^{[1
,5
]}

Heiz, Ueli ^{[2
,3
]}

Langhammer, Christoph ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

[2] Tech Univ Munich, Catalysis Res Ctr, Chair Phys Chem, D-85748 Garching, Germany

[3] Tech Univ Munich, Dept Chem, D-85748 Garching, Germany

[4] Tech Univ Denmark, Ctr Electron Nanoscopy, DK-2800 Lyngby, Denmark

[5] Russian Acad Sci, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

NANO LETTERS | 2014年 / 14卷 / 10期

基金：

瑞典研究理事会;

关键词：

Size-selected clusters; indirect nanoplasmonic sensing; sintering; sintering resistance; Ostwald ripening; platinum; TRANSMISSION ELECTRON-MICROSCOPY; NANOPARTICLES; NANOMATERIALS; GROWTH;

D O I：

10.1021/nl502686u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：5803 / 5809

页数：7

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