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Volume 152, 2011
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Exploring the structure and chemical activity of 2-D gold islands on graphene moiré/Ru(0001)

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Abstract

Au deposited on Ru(0001)-supported extended, continuous graphene moiré forms large 2-D islands at room temperature that are several nanometers in diameter but only 0.55 nm in height, in the apparent absence of typical binding sites such as defects and adsorbates. These Au islands conform to the corrugation of the underlying graphene and display commensurate moiré patterns. Several extended Au structure models on graphene/Ru(0001) are examined using density functional theory calculations. Close-packed Au overlayers are energetically more stable, but all interact weakly with the support. Preliminary tests found the Au islands/graphene/Ru(0001) surface to be active for CO oxidation at cryogenic temperature, which suggests that the Au itself is the locus of catalytic activity.

  • This article is part of the themed collection: Gold
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Publication details

The article was received on 02 Mar 2011, accepted on 06 May 2011 and first published on 27 Jul 2011


Article type: Paper
DOI: 10.1039/C1FD00030F
Citation: Faraday Discuss., 2011,152, 267-276
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    Exploring the structure and chemical activity of 2-D gold islands on graphene moiré/Ru(0001)

    Y. Xu, L. Semidey-Flecha, L. Liu, Z. Zhou and D. Wayne Goodman, Faraday Discuss., 2011, 152, 267
    DOI: 10.1039/C1FD00030F

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