Direct evidence of oxidized gold on supported gold catalysts

L. Fu, N. Q. Wu, J. H. Yang, F. Qu, D. L. Johnson, M. C. Kung, H. H. Kung, V. P. Dravid

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104 Citations (Scopus)

Abstract

Supported gold catalysts have drawn worldwide interest due to the novel properties and potential applications in industries. However, the origin of the catalytic activity in gold nanoparticles is still not well understood. In this study, time-of-flight secondary ion mass spectroscopy (TOF-SIMS) has been applied to investigate the nature of gold in Au (1.3 wt %)/γ-Al 2O 3 and Au (2.8 wt %)/TiO 2 catalysts prepared by the deposition-precipitation method. The SIMS spectrum of the supported gold catalysts presented AuO -, AuO 2 -, and AuOH - ion clusters. These measurements show direct evidence for oxidized gold on supported gold catalysts and may be helpful to gaining better understanding of the origin of the catalytic activity.

Original languageEnglish
Pages (from-to)3704-3706
Number of pages3
JournalJournal of Physical Chemistry B
Volume109
Issue number9
DOIs
Publication statusPublished - Mar 10 2005

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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    Fu, L., Wu, N. Q., Yang, J. H., Qu, F., Johnson, D. L., Kung, M. C., Kung, H. H., & Dravid, V. P. (2005). Direct evidence of oxidized gold on supported gold catalysts. Journal of Physical Chemistry B, 109(9), 3704-3706. https://doi.org/10.1021/jp045117e