Structural study of NO adsorbed on the reconstructed Pt(110)-(1 × 2) surface with X-ray photoelectron diffraction and near-edge X-ray absorption fine structure spectroscopy

Toru Shimada, Hiroshi Kondoh, Masaoki Iwasaki, Ikuyo Nakai, Masanari Nagasaka, Kenta Amemiya, Hideo Orita, Toshiaki Ohta

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Abstract

The adsorption structure of NO on the reconstructed Pt(110)-(1 × 2) surface was studied with X-ray photoelectron spectroscopy (XPS), X-ray photoelectron diffraction (XPD), low-energy scanned-angle photoelectron diffraction (LESA-PD), and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. The experiments were performed at 180 K, where no surface lifting from (1 × 2) to (1 × 1) takes place after NO adsorption. XPS indicates that the (1 × 2) unit cell of the Pt(110) surface contains 1.5 NO molecules at the saturated coverage. XPD and LESA-PD analyses allow us to propose a structural model for the NO adlayer, where two-thirds of the NO molecules in the (1 × 2) unit cell are adsorbed on the atop site of the close-packed Pt rows (ridges) along the [11̄0] direction with an inclined geometry and one-third of the NO molecules adsorb on the bridge site between the Pt ridges with an upright configuration. This model is supported by the N K-edge NEXAFS experiments and is consistent with the recently reported model based on the density functional theory (Orita, H.; Nakamura, I.; Fujitani, T. J. Phys. Chem. B 2005, 109, 10312).

Original languageEnglish
Pages (from-to)20507-20512
Number of pages6
JournalJournal of Physical Chemistry B
Volume110
Issue number41
DOIs
Publication statusPublished - 2006 Oct 19

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ASJC Scopus subject areas

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

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