Issue 6, 2013

Electronic interactions and charge transfers of metal atoms and clusters on oxide surfaces

Abstract

Understanding the interaction of small metal clusters and isolated atoms with oxide surfaces is crucial in order to rationalize the properties of heterogeneous catalysts composed of sub-nanometer metal particles dispersed on an oxide support. The interaction with the oxide surface can significantly alter the original properties of the metal deposit. In particular, the occurrence and the direction of charge transfer at the metal/oxide interface determine the chemical activity of the supported catalyst. The charge transfer depends on a number of factors like the nature of the oxide (reducible or non-reducible), the surface exposed, the presence of defects, the nature of the supported metal, etc. In this article we describe the most important conceptual aspects of the electronic metal–support interaction, a phenomenon related to the direct modification of the metal nano-particle determined by the formation of chemical bonds at the interface with the oxide. For metal nano-particles with a size of about 1 nm or below these effects become dominant although difficult to identify experimentally.

Graphical abstract: Electronic interactions and charge transfers of metal atoms and clusters on oxide surfaces

Article information

Article type
Perspective
Submitted
23 Oct 2012
Accepted
04 Dec 2012
First published
03 Jan 2013

Phys. Chem. Chem. Phys., 2013,15, 1737-1757

Electronic interactions and charge transfers of metal atoms and clusters on oxide surfaces

G. Pacchioni, Phys. Chem. Chem. Phys., 2013, 15, 1737 DOI: 10.1039/C2CP43731G

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