Effects of hydrogen on ISS analysis of dispersed metal catalysts

The origin of inelastic scattering in ISS spectra at low energy ratios (E/E0 ≤ 0.3) is discussed, and a description of results from ISS and XPS experiments on well‐characterized Co/ZSM‐5 catalysts after calcination in air and reduction in H2, H2 + CO, or CO is given. These treatments show that the c...

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Bibliographic Details
Published in:Surface and interface analysis 1984-04, Vol.6 (2), p.56-61
Main Authors: Diehl, J. R., Stencel, J. M., Spitler, C. A., Makovsky, L. E.
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
General. Nomenclature, chemical documentation, computer chemistry
Theory of reactions, general kinetics
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The origin of inelastic scattering in ISS spectra at low energy ratios (E/E0 ≤ 0.3) is discussed, and a description of results from ISS and XPS experiments on well‐characterized Co/ZSM‐5 catalysts after calcination in air and reduction in H2, H2 + CO, or CO is given. These treatments show that the chemisorption of hydrogen on highly dispersed metallic Co and Fe causes shielding of the metal from ISS detection. Additionally, the presence of hydrogen, whether in a chemisorbed form or in other forms such as hydrocarbons or H2O, affects significantly the intensity of the inelastic scattering.
ISSN:0142-2421
1096-9918
DOI:10.1002/sia.740060204