Title
Controlled deposition of iron oxide on the surface of zirconia by the molecular designed dispersion of <tex>$Fe(acac)_{3}$</tex> : a spectroscopic study
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Washington, D.C. ,
Subject
Physics
Chemistry
Source (journal)
Langmuir
Langmuir: the ACS journal of surfaces and colloids. - Washington, D.C.
Volume/pages
18(2002) :11 , p. 4420-4425
ISSN
0743-7463
ISI
000175801600037
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The reaction of Fe(acac)(3) with the surface of zirconia has been studied for the first time using in situ infrared diffuse reflectance spectroscopy, photoacoustic spectroscopy, and Fourier transform Raman spectroscopy. The unstable Fe(acac)(3) reacts readily with the surface of zirconia at room temperature in the liquid phase or at 110degreesC in the gas phase, yielding grafted Fe-OH species and Zr-acac surface groups. We present evidence that the reaction occurs both with coordinatively unsaturated Zr sites and with the surface hydroxyls. The grafted Zr-acac groups are thermally unstable and form Zr-acetate groups after thermal treatment at 110degreesC in ambient air. After removal of the organic ligands, noncrystalline iron oxide species are formed on the zirconia surface. The grafting of iron oxide on zirconia is a relevant procedure to form either redox catalysts or solid-state fuel cells.
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