When Gold Is Not Noble: Nanoscale Gold Catalysts

A. Sanchez, S. Abbet, U. Heiz, W. D. Schneider, H. Häkkinen, R. N. Barnett, Uzi Landman

Research output: Contribution to journalReview articlepeer-review

1378 Scopus citations

Abstract

While inert as bulk material, nanoscale gold particles dispersed on oxide supports exhibit a remarkable catalytic activity. Temperature-programmed reaction studies of the catalyzed combustion of CO on size-selected small monodispersed Aun (n ≤ 20) gold clusters supported on magnesia, and first-principle simulations, reveal the microscopic origins of the observed unusual catalytic activity, with Au8 found to be the smallest catalytically active size. Partial electron transfer from the surface to the gold cluster and oxygen-vacancy F-center defects are shown to play an essential role in the activation of nanosize gold clusters as catalysts for the combustion reaction.

Original languageEnglish
Pages (from-to)9573-9578
Number of pages6
JournalJournal of Physical Chemistry A
Volume103
Issue number48
DOIs
StatePublished - 2 Dec 1999
Externally publishedYes

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