Premium
Surface basicity of ceria‐supported lanthana. Influence of the calcination temperature
Author(s) -
Bernal S.,
Blanco G.,
El Amarti A.,
Cifredo G.,
Fitian L.,
Galtayries A.,
Martín J.,
Pintado J. M.
Publication year - 2006
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.2224
Subject(s) - calcination , x ray photoelectron spectroscopy , desorption , raman spectroscopy , chemistry , adsorption , thermal desorption spectroscopy , mass spectrometry , inorganic chemistry , analytical chemistry (journal) , chemical engineering , catalysis , environmental chemistry , organic chemistry , chromatography , physics , optics , engineering
The surface basicity of pure ceria is strongly enhanced by the presence of the supported La 2 O 3 , the effect being very much influenced by the calcination temperature. X‐ray diffraction (XRD), Raman spectroscopy, and La 3d 5/2 XPS data for the different samples show a progressive incorporation of La 3+ into the ceria lattice as the calcination temperature is increased. This structural change is considered to be responsible for the modifications that occurred in the basicity of the lanthana‐modified ceria samples as revealed by temperature‐programmed desorption‐mass spectrometry (TPD‐MS) of pre‐adsorbed CO 2 . Copyright © 2006 John Wiley & Sons, Ltd.