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AEM, XPS and ISS characterization of catalyst modifications during propene oxidation over a supported mixed oxide catalyst
Author(s) -
Kremenić G.,
Corberán V. Cortés,
Tascón J. M. D.
Publication year - 1986
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.740090403
Subject(s) - propene , catalysis , x ray photoelectron spectroscopy , characterization (materials science) , selectivity , dispersion (optics) , oxide , scanning electron microscope , chemistry , chemical engineering , analytical chemistry (journal) , materials science , nanotechnology , organic chemistry , physics , optics , engineering , composite material
The activity of a (MoFeTeCo) O/SiO 2 catalyst for propene partial oxidation increases with time on stream, being accompanied by no noticeable change in selectivity to products. The use of a series of characterization techniques (x‐ray diffraction, SEM, analytical electron microscopy, XPS and ISS) allowed us to conclude that the presence of the same phases in the fresh and used catalysts agrees with the constancy of selectivities, while catalytic activity increase is ascribable to a higher degree of dispersion of the active phases. The advantage of the joint use of characterization techniques with different degrees of accessibility to the sample in study are emphasized.