Adsorption and reactivity of SO2 on Ir(1 1 1) and Rh(1 1 1)

T. Fujitani, I. Nakamura, Y. Kobayashi, A. Takahashi, M. Haneda, H. Hamada

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The adsorption and reactivity of SO2 on the Ir(1 1 1) and Rh(1 1 1) surfaces were studied by surface science techniques. X-ray photoelectron spectroscopy measurements showed that SO2 was molecularly adsorbed on both the Ir(1 1 1) surface and the Rh(1 1 1) surface at 200 K. Adsorbed SO2 on the Ir(1 1 1) surface disproportionated to atomic sulfur and SO3 at 300 K, whereas adsorbed SO2 on the Rh(1 1 1) surface dissociated to atomic sulfur and oxygen above 250 K. Only atomic sulfur was present on both surfaces above 500 K, but the formation process and structure of the adsorbed atomic sulfur on Ir(1 1 1) were different from those on Rh(1 1 1). On Ir(1 1 1), atomic sulfur reacted with surface oxygen and was completely removed from the surface, whereas on Rh(1 1 1), sulfur did not react with oxygen.

Original languageEnglish
Pages (from-to)1615-1622
Number of pages8
JournalSurface Science
Issue number6
Publication statusPublished - 2007 Mar 15
Externally publishedYes


  • Ir(1 1 1)
  • Low-energy electron diffraction
  • Rh(1 1 1)
  • Sulfur dioxide
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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