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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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).

元の言語English
ページ(範囲)20507-20512
ページ数6
ジャーナルJournal of Physical Chemistry B
110
発行部数41
DOI
出版物ステータスPublished - 2006 10 19
外部発表Yes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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