Journal
CHEMICAL PHYSICS LETTERS
Volume 377, Issue 1-2, Pages 170-176Publisher
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DOI: 10.1016/S0009-2614(03)01130-8
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Experimental evidences for the non-dissociative chemisorption of O-2 are presented on even-numbered free Au anion clusters (Au-n(-), n =number of atoms) up to Au-20(-) at room temperature. Our result indicates that the formation of the activated di-oxygen species is the key of the unusual catalytic activities of Au-based catalysts. No correlation between geometrical structures of Au-n(-) and the activities towards O-2 adsorption was found, showing that site-specific chemistry disappears for Au-nanocatalysis. We demonstrate that interplay between cluster physics and surface chemistry is a promising strategy to unveil mechanisms of elementary steps in nanocatalysis. (C) 2003 Elsevier B.V. All rights reserved.
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