Search for adsorption potential energy minima of NO on Pt(9 9 7) at 11 K

N. Tsukahara, K. Mukai, Y. Yamashita, J. Yoshinobu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We observed four kinds of adsorbed NO molecules on Pt(9 9 7) at 11 K using infrared reflection absorption spectroscopy (IRAS). The peaks at 1690, 1484 and 1615 cm-1 are assigned to the N-O stretching modes of the on-top site and the hollow site on the terrace and the bridge site at the step, respectively. The 1385 cm-1 peak is observed below ∼70 K. We assign the 1385 cm-1 peak to the hollow site of the (1 1 1) microfacet at the step or the lower-terrace hollow site nearest to the step. By heating, site-to-site hopping to the more stable site occurs and the relative stability of four adsorption sites can be determined.

Original languageEnglish
Pages (from-to)3560-3563
Number of pages4
JournalSurface Science
Volume600
Issue number18
DOIs
Publication statusPublished - 2006 Sep 15
Externally publishedYes

Keywords

  • Adsorption
  • Infrared absorption spectroscopy
  • Nitric monoxide
  • Platinum
  • Step surface

ASJC Scopus subject areas

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

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