title: Structural study of NO adsorbed on the reconstructed Pt(110)-(1 x 2) surface with X-ray photoelectron diffraction and near-edge X-ray absorption fine structure spectroscopy.
abstract: The adsorption structure of NO on the reconstructed Pt(110)-(1 x 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 x 2) to (1 x 1) takes place after NO adsorption. XPS indicates that the (1 x 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 x 2) unit cell are adsorbed on the atop site of the close-packed Pt rows (ridges) along the [10] 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).
authors.affiliation: Department of Chemistry, School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Shimada
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kondoh
authors.forename: Masaoki
authors.initials: M
authors.lastname: Iwasaki
authors.forename: Ikuyo
authors.initials: I
authors.lastname: Nakai
authors.forename: Masanari
authors.initials: M
authors.lastname: Nagasaka
authors.forename: Kenta
authors.initials: K
authors.lastname: Amemiya
authors.forename: Hideo
authors.initials: H
authors.lastname: Orita
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Ohta