Issue 46, 2010
From the journal:

Physical Chemistry Chemical Physics

Model catalysts of supported Aunanoparticles and mass-selected clusters†

Dong-Chan Lim,a   Chan-Cuk Hwang,b   Gerd Ganteförc  and  Young Dok Kim*d  

* Corresponding authors

a Materials Processing Division, Korea Institute of Materials Science, Changwon, 641-010, Korea

b Beamline Research Division, Pohang Accelerator Laboratory (PAL), Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Korea

c Department of Physics, University of Konstanz, 78457 Konstanz, Germany

d Department of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea
E-mail: ydkim91@skku.edu
Fax: ++82-31-290-7075
Tel: ++83-31-299-4564

Abstract

In surface science, much effort has gone into obtaining a deeper understanding of the size-selectivity of nanocatalysts. In this article, electronic and chemical properties of various model catalysts consisting of Au are reported. Au supported by oxide surfaces becomes inert towards chemisorption and oxidation as the particle size became smaller than a critical size (2–3 nm). The inertness of these small Au nanoparticles is due to the electron-deficient nature of smaller Au nanoparticles, which is a result of metal-substrate charge transfer. Properties of Au clusters smaller than ∼20 atoms were shown to be non-scalable, i.e., every atom can drastically change the chemical properties of the clusters. Moreover, clusters with the same size can show dissimilar properties on various substrates. These recent endeavours show that the activity of a catalyst can be tuned by varying the substrate or by varying the cluster size on an atom-by-atom basis.

Graphical abstract: Model catalysts of supported Au nanoparticles and mass-selected clusters

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Article information

DOI
https://doi.org/10.1039/C0CP00467G
Article type
Perspective
Submitted
06 May 2010
Accepted
06 Sep 2010
First published
07 Oct 2010

Phys. Chem. Chem. Phys., 2010,12, 15172-15180

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Model catalysts of supported Au nanoparticles and mass-selected clusters

D. Lim, C. Hwang, G. Ganteför and Y. D. Kim, Phys. Chem. Chem. Phys., 2010, 12, 15172 DOI: 10.1039/C0CP00467G

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