Methanol-driven structuring of Au-Pt bimetallic nanoclusters on a thin film of Al 2O 3/NiAl(100)

Chiun Yu Ho, Rahul B. Patil, Chao Chuan Wang, Chen Sheng Chao, Yu Da Li, Hsing Chung Hsu, Meng Fan Luo, Yin Chang Lin, Yu Lin Lai, Yao Jane Hsu

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9 Scopus citations

Abstract

The adsorption of methanol altered structures of Au-Pt bimetallic nanoclusters on a thin film of Al 2O 3/NiAl(100). Methanol adsorbed on the Au-Pt intermixed bimetallic clusters, of which the surfaces consist of both Au and Pt, induced a segregation of Au from Pt. This segregation state was unstable, as the clusters returned to the initial Au-Pt intermixed state upon desorption or decomposition of adsorbed methanol. Ethanol and cyclohexene were adsorbed on Au-Pt bimetallic clusters for comparisons, indicating that the interaction of the hydroxyl group of methanol with the clusters accounts for the structural modifications.

Original languageEnglish
Pages (from-to)1173-1179
Number of pages7
JournalSurface Science
Volume606
Issue number15-16
DOIs
StatePublished - Aug 2012

Keywords

  • Aluminum oxide
  • Bimetallic nanoclusters
  • Gold
  • Methanol
  • Photoelectron spectra
  • Platinum

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