Formation of methyne intermediates by hydrogenation of surface carbon on Ru(001)

M. A. Barteau; P. Feulner; R. Stengl; J. Q. Broughton; D. Menzel

doi:10.1016/0021-9517(85)90081-8

Formation of methyne intermediates by hydrogenation of surface carbon on Ru(001)

M. A. Barteau, P. Feulner, R. Stengl, J. Q. Broughton, D. Menzel

Chair of Experimental Physics

Technical University of Munich

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

52 Scopus citations

Abstract

Adsorbed methyne (CH) intermediates were synthesized on the Ru(001) surface by hydrogenation of predeposited carbon under UHV conditions. These species were identified by High-Resolution Electron Energy-Loss Spectroscopy (HREELS) based upon spectra which exhibited an intense CH stretch at 2950 cm^-1 and no evidence for CH₂ scissor or CH₃ umbrella modes. The adsorbed CH species could be formed by hydrogenation of carbon initially deposited by electron-beam-stimulated dissociation of CO, by thermal decomposition of ethylene, or by ethylene hydrogenolysis. The maximum intensity of the CH stretch was observed for surface temperatures of 370 K; the CH species decomposed completely to H₂ plus adsorbed carbon upon heating the surface to 500 K. These results are consistent with the participation of CH intermediates in the Fischer-Tropsch synthesis via the "active-carbide" mechanism.

Original language	English
Pages (from-to)	51-59
Number of pages	9
Journal	Journal of Catalysis
Volume	94
Issue number	1
DOIs	https://doi.org/10.1016/0021-9517(85)90081-8
State	Published - Jul 1985

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title = "Formation of methyne intermediates by hydrogenation of surface carbon on Ru(001)",

abstract = "Adsorbed methyne (CH) intermediates were synthesized on the Ru(001) surface by hydrogenation of predeposited carbon under UHV conditions. These species were identified by High-Resolution Electron Energy-Loss Spectroscopy (HREELS) based upon spectra which exhibited an intense CH stretch at 2950 cm-1 and no evidence for CH2 scissor or CH3 umbrella modes. The adsorbed CH species could be formed by hydrogenation of carbon initially deposited by electron-beam-stimulated dissociation of CO, by thermal decomposition of ethylene, or by ethylene hydrogenolysis. The maximum intensity of the CH stretch was observed for surface temperatures of 370 K; the CH species decomposed completely to H2 plus adsorbed carbon upon heating the surface to 500 K. These results are consistent with the participation of CH intermediates in the Fischer-Tropsch synthesis via the {"}active-carbide{"} mechanism.",

author = "Barteau, {M. A.} and P. Feulner and R. Stengl and Broughton, {J. Q.} and D. Menzel",

note = "Funding Information: We wish to thank H. v. Seefeldf or his contribution in the constructiono f the spectrometere lectronicsa nd the crystal manipulator.T his work was supportedb y the DeutscheF orschungsgemeinshatfth roughS onder-forschungsbereich1 28.O ne of us (M.A.B.) wishes to thank the National Science Foundation for support througha n NSF PostdoctoralF ellowship.",

year = "1985",

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doi = "10.1016/0021-9517(85)90081-8",

language = "English",

volume = "94",

pages = "51--59",

journal = "Journal of Catalysis",

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T1 - Formation of methyne intermediates by hydrogenation of surface carbon on Ru(001)

AU - Barteau, M. A.

AU - Feulner, P.

AU - Stengl, R.

AU - Broughton, J. Q.

AU - Menzel, D.

N1 - Funding Information: We wish to thank H. v. Seefeldf or his contribution in the constructiono f the spectrometere lectronicsa nd the crystal manipulator.T his work was supportedb y the DeutscheF orschungsgemeinshatfth roughS onder-forschungsbereich1 28.O ne of us (M.A.B.) wishes to thank the National Science Foundation for support througha n NSF PostdoctoralF ellowship.

PY - 1985/7

Y1 - 1985/7

N2 - Adsorbed methyne (CH) intermediates were synthesized on the Ru(001) surface by hydrogenation of predeposited carbon under UHV conditions. These species were identified by High-Resolution Electron Energy-Loss Spectroscopy (HREELS) based upon spectra which exhibited an intense CH stretch at 2950 cm-1 and no evidence for CH2 scissor or CH3 umbrella modes. The adsorbed CH species could be formed by hydrogenation of carbon initially deposited by electron-beam-stimulated dissociation of CO, by thermal decomposition of ethylene, or by ethylene hydrogenolysis. The maximum intensity of the CH stretch was observed for surface temperatures of 370 K; the CH species decomposed completely to H2 plus adsorbed carbon upon heating the surface to 500 K. These results are consistent with the participation of CH intermediates in the Fischer-Tropsch synthesis via the "active-carbide" mechanism.

AB - Adsorbed methyne (CH) intermediates were synthesized on the Ru(001) surface by hydrogenation of predeposited carbon under UHV conditions. These species were identified by High-Resolution Electron Energy-Loss Spectroscopy (HREELS) based upon spectra which exhibited an intense CH stretch at 2950 cm-1 and no evidence for CH2 scissor or CH3 umbrella modes. The adsorbed CH species could be formed by hydrogenation of carbon initially deposited by electron-beam-stimulated dissociation of CO, by thermal decomposition of ethylene, or by ethylene hydrogenolysis. The maximum intensity of the CH stretch was observed for surface temperatures of 370 K; the CH species decomposed completely to H2 plus adsorbed carbon upon heating the surface to 500 K. These results are consistent with the participation of CH intermediates in the Fischer-Tropsch synthesis via the "active-carbide" mechanism.

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DO - 10.1016/0021-9517(85)90081-8

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VL - 94

SP - 51

EP - 59

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Formation of methyne intermediates by hydrogenation of surface carbon on Ru(001)

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