The adsorption of NO on Ru(001) and on O(2 × 1)/Ru(001) revisited

P. Jakob; M. Stichler; D. Menzel

doi:10.1016/S0039-6028(96)01176-4

The adsorption of NO on Ru(001) and on O(2 × 1)/Ru(001) revisited

P. Jakob, M. Stichler, D. Menzel

Chair of Experimental Physics

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

The infrared absorption spectra of NO adsorbed on Ru(001) and on O(2 × 1)/Ru(001) have been re-examined to clarify several open questions in these systems, including an old puzzle regarding the insensitivity of IRAS to detect NO/Ru(001) on threefold bridge sites despite its clear presence in (specular) HREELS spectra. We find no indication for such an inconsistency in vibrational spectra as we observe both, the multiply coordinated v₁-NO and the linear v₂-NO species; we are able to detect their internal stretching modes with signal-to-noise ratios up to 1000:1. We attribute this to better instrumentation as well as to improved crystal perfection and layer homogeneity. These improvements reflect themselves in unparalleled 3 cm^-1 linewidths of the vibrational bands and very narrow peaks in thermal desorption spectroscopy. As in the case of CO/O(2 × 1)/Ru(001), a (2 × 2) honeycomb structure must form for NO/O(2 × 1)/Ru(001) after annealing to 400 K. A consistent new picture of the processes occurring upon coadsorption and annealing can be obtained.

Original language	English
Pages (from-to)	L185-L192
Journal	Surface Science
Volume	370
Issue number	1
DOIs	https://doi.org/10.1016/S0039-6028(96)01176-4
State	Published - 1 Jan 1997

Keywords

Infrared absorption spectroscopy
Low index single crystal surface
Nitrogen oxides
Oxygen
Ruthenium
Surface structure, morphology, roughness, and topography
Thermal desorption spectroscopy
Vibrations of adsorbed molecules

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10.1016/S0039-6028(96)01176-4

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title = "The adsorption of NO on Ru(001) and on O(2 × 1)/Ru(001) revisited",

abstract = "The infrared absorption spectra of NO adsorbed on Ru(001) and on O(2 × 1)/Ru(001) have been re-examined to clarify several open questions in these systems, including an old puzzle regarding the insensitivity of IRAS to detect NO/Ru(001) on threefold bridge sites despite its clear presence in (specular) HREELS spectra. We find no indication for such an inconsistency in vibrational spectra as we observe both, the multiply coordinated v1-NO and the linear v2-NO species; we are able to detect their internal stretching modes with signal-to-noise ratios up to 1000:1. We attribute this to better instrumentation as well as to improved crystal perfection and layer homogeneity. These improvements reflect themselves in unparalleled 3 cm-1 linewidths of the vibrational bands and very narrow peaks in thermal desorption spectroscopy. As in the case of CO/O(2 × 1)/Ru(001), a (2 × 2) honeycomb structure must form for NO/O(2 × 1)/Ru(001) after annealing to 400 K. A consistent new picture of the processes occurring upon coadsorption and annealing can be obtained.",

keywords = "Infrared absorption spectroscopy, Low index single crystal surface, Nitrogen oxides, Oxygen, Ruthenium, Surface structure, morphology, roughness, and topography, Thermal desorption spectroscopy, Vibrations of adsorbed molecules",

author = "P. Jakob and M. Stichler and D. Menzel",

note = "Funding Information: This work was supported by the Deutsche Forschungsgemeinschaft through SFB 338.",

year = "1997",

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doi = "10.1016/S0039-6028(96)01176-4",

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T1 - The adsorption of NO on Ru(001) and on O(2 × 1)/Ru(001) revisited

AU - Jakob, P.

AU - Stichler, M.

AU - Menzel, D.

N1 - Funding Information: This work was supported by the Deutsche Forschungsgemeinschaft through SFB 338.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - The infrared absorption spectra of NO adsorbed on Ru(001) and on O(2 × 1)/Ru(001) have been re-examined to clarify several open questions in these systems, including an old puzzle regarding the insensitivity of IRAS to detect NO/Ru(001) on threefold bridge sites despite its clear presence in (specular) HREELS spectra. We find no indication for such an inconsistency in vibrational spectra as we observe both, the multiply coordinated v1-NO and the linear v2-NO species; we are able to detect their internal stretching modes with signal-to-noise ratios up to 1000:1. We attribute this to better instrumentation as well as to improved crystal perfection and layer homogeneity. These improvements reflect themselves in unparalleled 3 cm-1 linewidths of the vibrational bands and very narrow peaks in thermal desorption spectroscopy. As in the case of CO/O(2 × 1)/Ru(001), a (2 × 2) honeycomb structure must form for NO/O(2 × 1)/Ru(001) after annealing to 400 K. A consistent new picture of the processes occurring upon coadsorption and annealing can be obtained.

AB - The infrared absorption spectra of NO adsorbed on Ru(001) and on O(2 × 1)/Ru(001) have been re-examined to clarify several open questions in these systems, including an old puzzle regarding the insensitivity of IRAS to detect NO/Ru(001) on threefold bridge sites despite its clear presence in (specular) HREELS spectra. We find no indication for such an inconsistency in vibrational spectra as we observe both, the multiply coordinated v1-NO and the linear v2-NO species; we are able to detect their internal stretching modes with signal-to-noise ratios up to 1000:1. We attribute this to better instrumentation as well as to improved crystal perfection and layer homogeneity. These improvements reflect themselves in unparalleled 3 cm-1 linewidths of the vibrational bands and very narrow peaks in thermal desorption spectroscopy. As in the case of CO/O(2 × 1)/Ru(001), a (2 × 2) honeycomb structure must form for NO/O(2 × 1)/Ru(001) after annealing to 400 K. A consistent new picture of the processes occurring upon coadsorption and annealing can be obtained.

KW - Infrared absorption spectroscopy

KW - Low index single crystal surface

KW - Nitrogen oxides

KW - Oxygen

KW - Ruthenium

KW - Surface structure, morphology, roughness, and topography

KW - Thermal desorption spectroscopy

KW - Vibrations of adsorbed molecules

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SP - L185-L192

JO - Surface Science

JF - Surface Science

IS - 1

ER -

The adsorption of NO on Ru(001) and on O(2 × 1)/Ru(001) revisited

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