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Dipole–dipole interactions among CH3Cl molecules on Ru(001): Correlation between work function change and thermal desorption studies
Work function change measurements () combined with temperature programmed desorption (TPD) were employed to study layer growth mechanism and the CH3Cl dipole–dipole interactions on Ru(001), over ...
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Atomic and molecular hydrogen interacting with Pt(111)
This computational study is motivated by the apparent conflict between an experiment on dissociation of H2 and D2 on Pt(111), which suggests a rather corrugated potential energy surface (PES) for the ...

Vibrational and structural properties of OH adsorbed on Pt(111)

J. Chem. Phys. 111, 11147 (1999); doi:10.1063/1.480472

Issue Date: 22 December 1999

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K. Bedürftig, S. Völkening, Y. Wang, J. Wintterlin, K. Jacobi, and G. Ertl
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
OH species adsorbed on Pt(111) were studied in a combined investigation using scanning tunneling microscopy (STM) and high-resolution electron energy loss spectroscopy (HREELS). OH was formed by two different reactions, by reaction of H2O with O, and as an intermediate in the reaction of O with hydrogen to H2O. In both cases, two ordered OH phases were observed, a ([square root of]3×[square root of]3)R30° and a (3×3) structure, for which models are proposed. Both structures have OH coverages of 2/3, and their formation is driven by hydrogen bond formation between the adparticles; the OH adsorption site is most likely on top. OH molecules at defects in the adlayer, in particular at island edges, are spectroscopically distinguishable and contribute significantly to the vibrational spectra in disordered OH layers. This is important for the water formation reaction, where the OH islands are small. The discrepancies between previous HREELS studies on OH can be explained by the different degree of order under the various formation conditions. ©1999 American Institute of Physics.
History: Received 11 May 1999; accepted 27 September 1999
Permalink: http://link.aip.org/link/?JCPSA6/111/11147/1
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KEYWORDS and PACS

Keywords
PACS
  • 68.45.-v
    Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties) Solid–fluid interfaces
  • 82.65.My
    Physical chemistry Surface and interface chemistry Chemisorption
  • 33.15.Mt
    Molecular properties and interactions with photons Properties of molecules and molecular ions Rotation, vibration, and vibration–rotation constants
  • 33.15.Bh
    Molecular properties and interactions with photons Properties of molecules and molecular ions General molecular conformation and symmetry; stereochemistry
  • 61.16.Ch
    Structure of solids and liquids; crystallography Electron, ion, and scanning probe microscopy Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc.
  • 34.80.-i
    Atomic and molecular collision processes and interactions Electron scattering
  • 79.20.Kz
    Electron and ion emission by liquids and solids; impact phenomena Impact phenomena (including electron spectra and sputtering) Other electron-impact emission phenomena
  • 33.15.Fm
    Molecular properties and interactions with photons Properties of molecules and molecular ions Bond strengths, dissociation energies
  • 61.50.Lt
    Structure of solids and liquids; crystallography Crystalline state Crystal binding; cohesive energy
  • 82.65.-i
    Physical chemistry Surface and interface chemistry
  • YEAR: 1999

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (31)
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