Electron Spectroscopic Studies of Acetylene Adsorption on Polycrystalline Iron Films

Pirner, Manfred L.; Borgmann, D.; Wedler, G.

doi:10.1007/978-3-642-75066-3_27

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…They include a variety of metals used as catalysts, like Fe, Ni, Pt, Rh, and Ru. Many different experimental methods have been applied, e.g., low energy electron diffraction (LEED), , photoelectron diffraction, high resolution electron energy loss spectroscopy (HREELS), − reflection absorption infrared spectroscopy (RAIRS), , ultraviolet and X-ray photoelectron spectroscopy (UPS and XPS), ,, Auger electron spectroscopy (AES), static secondary ion mass spectrometry (SSIMS) and thermal desorption spectroscopy (TDS). − Most of these techniques provide experimental data that allow the identification of the structure and geometrical arrangement of the chemisorbed species. Usually the investigations were carried out with small hydrocarbons like ethene or ethyne and higher hydrocarbons like butenes or benzene, but only a few papers deal with the adsorption of propene on transition metal surfaces. ,,,,, …”

Section: Introductionmentioning

confidence: 99%

Interaction of Propene with Pure and Hydrogen-Precovered Nickel Films. Studied by Means of Isothermal Reaction Mass Spectrometry and Thermal Desorption Spectroscopy

Kleyna¹,

Fickert²,

Borgmann³

et al. 1998

Langmuir

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A special experimental setup was used to study the equilibrium gas composition after interaction of propene with pure thin polycrystalline nickel films and nickel films precovered with hydrogen under ultrahigh vacuum conditions. Isothermal reaction mass spectrometry allows the analysis of the gas phase composition under equilibrium conditions. The analyzed gas phase consists of desorbed reaction products formed in the adsorbate phase after adsorption of propene on nickel films at 273 K. This technique was combined with thermal desorption spectroscopy and measurements of adsorption-induced changes in the electrical resistance of the polycrystalline films. After interaction with pure nickel films, in addition to propene, hydrogen, methane, propane, and butane could be detected as reaction products. The interaction of propene with nickel films precovered with hydrogen leads to a higher yield of butane and additionally to the formation of pentane. Thermal desorption experiments carried out after adsorption of propene at 77 K show only desorption of hydrogen, when the propene coverage was small. At higher coverages also propene desorbed.

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Section: Introductionmentioning

confidence: 99%

Interaction of Propene with Pure and Hydrogen-Precovered Nickel Films. Studied by Means of Isothermal Reaction Mass Spectrometry and Thermal Desorption Spectroscopy

Kleyna¹,

Fickert²,

Borgmann³

et al. 1998

Langmuir

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Adsorption and Reaction of Butenes on Polycrystalline Nickel Films

Klingenberg

Haseneder

Borgmann

et al. 1992

Ber Bunsenges Phys Chem

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Supplementary to literature on spectroscopic investigations of butenes adsorbed on transition metal surfaces at 273 K, the gas phase which is in equilibrium with the adsorbed layer has been analysed. Isothermic reaction mass spectrometry (IRMS) and thermal desorption spectroscopy (TDS) were applied. It is shown that for cis‐2‐butene, trans‐2‐butene, 1‐butene and 2‐methyl‐propene (iso‐butene) considerable hydrogen abstraction and partly C–C‐bond cleavage takes place. In the monolayer range methane appears in the gas phase. At coverages exceeding a monolayer hydrogen, butane and butene become the main components. Thermal desorption spectroscopy after adsorption at 77 K shows only hydrogen and methane at rather high temperatures. Starting with a multilayer adsorption of butenes at 77 K leads to desorption of butene, butane, hydrogen and methane.

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Identification of the carbonaceous residues at nickel and platinum surfaces on the basis of the carbon KLL spectra

Lesiak¹,

Jabłoński²,

Palczewska³

et al. 1992

Surface & Interface Analysis

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Interaction of carbon compounds with transition metal surfaces results, under appropriate conditions, in the formation of a number of carbon-containing species of different character. In the present work, the pattern recognition method (the k-nearest neighbour rule) together with AES was applied to study the carbonaceous residues after adsorption of acetylene and ethylene at the surface of polycrystalline nickel and platinum. The above method identifies the residues by comparison to different samples of polyacetylenes. Identification is based on analysis of the KLL Auger spectra shape recorded for carbon atoms. As hypothetical oligomers, polyacetylenes with different conjugation lengths were chosen (7-105 hi). The applied method confirmed that ethylene and acetylene oligomerize at the nickel surface. Carbonaceous residues were recognized as the polyacetylenes with the longest conjugation lengths (105 hi). At the platinum surface the oligomerization process was also observed, but to a much smaller extent (average conjugation length equal to 15 A).

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Electron Spectroscopic Studies of Acetylene Adsorption on Polycrystalline Iron Films

Cited by 3 publications

References 11 publications

Interaction of Propene with Pure and Hydrogen-Precovered Nickel Films. Studied by Means of Isothermal Reaction Mass Spectrometry and Thermal Desorption Spectroscopy

Interaction of Propene with Pure and Hydrogen-Precovered Nickel Films. Studied by Means of Isothermal Reaction Mass Spectrometry and Thermal Desorption Spectroscopy

Adsorption and Reaction of Butenes on Polycrystalline Nickel Films

Identification of the carbonaceous residues at nickel and platinum surfaces on the basis of the carbon KLL spectra

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