Non-dissociative adsorption of diatomic molecules on nanoclusters at room temperature

2003
Kim, Young Dok
Journal article
Published in
Chemical Physics Letters ; 382 (2003), 5-6. - pp. 644-649
Abstract
Experiments using vibrationally resolved ultraviolet photoelectron spectroscopy (UPS) provide evidence that dissociative chemisorption of N2 becomes less stable than the molecular chemisorption on small clusters consisting of less than 10 metal atoms, which can efficiently dissociate diatomic molecules in the bulk form. This result is different from the generally accepted view that undercoordinated atoms are chemically more reactive. Our observation can be rationalized with a less efficient screening of the positive holes in smaller clusters created by a metal to adsorbate charge transfer, caused by the lower number of the directly neighbouring atoms.
530 Physics
Cite This
ISO 690KIM, Young Dok, Gerd GANTEFÖR, 2003. Non-dissociative adsorption of diatomic molecules on nanoclusters at room temperature. In: Chemical Physics Letters. 382(5-6), pp. 644-649. Available under: doi: 10.1016/j.cplett.2003.10.143
BibTex
@article{Kim2003Nondi-5231,
year={2003},
doi={10.1016/j.cplett.2003.10.143},
title={Non-dissociative adsorption of diatomic molecules on nanoclusters at room temperature},
number={5-6},
volume={382},
journal={Chemical Physics Letters},
pages={644--649},
author={Kim, Young Dok and Ganteför, Gerd}
}

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<dcterms:abstract xml:lang="eng">Experiments using vibrationally resolved ultraviolet photoelectron spectroscopy (UPS) provide evidence that dissociative chemisorption of N2 becomes less stable than the molecular chemisorption on small clusters consisting of less than 10 metal atoms, which can efficiently dissociate diatomic molecules in the bulk form. This result is different from the generally accepted view that undercoordinated atoms are chemically more reactive. Our observation can be rationalized with a less efficient screening of the positive holes in smaller clusters created by a metal to adsorbate charge transfer, caused by the lower number of the directly neighbouring atoms.</dcterms:abstract>
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Yes