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Effects of hydrogen on ISS analysis of dispersed metal catalysts
Author(s) -
Diehl J. R.,
Stencel J. M.,
Spitler C. A.,
Makovsky L. E.
Publication year - 1984
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740060204
Subject(s) - calcination , hydrogen , chemisorption , catalysis , metal , x ray photoelectron spectroscopy , inelastic scattering , spectral line , chemistry , analytical chemistry (journal) , scattering , materials science , inorganic chemistry , chemical engineering , metallurgy , physics , organic chemistry , optics , astronomy , engineering
The origin of inelastic scattering in ISS spectra at low energy ratios ( E / E 0 ≤ 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 H 2 , H 2 + 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 H 2 O, affects significantly the intensity of the inelastic scattering.