Characterization and catalytic investigation of NO plus CO reaction on perovskites of the general formula LaxM1-xFeO3 (M = Sr and/or Ce) prepared via a reverse micelles microemulsion route
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Ημερομηνία
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Applied Catalysis a-General
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
Four different perovskite type solids with nominal composition LaFeO3 (LFOr), La0.85Sr0.15FeO3 (LSFOr), La0.8Sr0.1Ce0.1FeP3 (LSCFOr) and La0.8Ce0.2FeO3 (LCFOr) were prepared via a reverse micelles microemulsion route. The aim of this work was to investigate the effect of doping with Sr and Ce in the structural properties, surface area and catalytic properties of final solids in comparison with the undoped reference solid LaFeO3. The microemulsion system which was used is composed of cetyl-trimethyl-ammonium-bromide (CTAB), 1-butanol, n-octane and nitrate salts of the metals. XRD measurements combined with Rietveld analysis helped us to identify the % quantity of structural phases which were formed. Scanning electron microscopy (SEM) images showed that the obtained solids consist of nanoparticles in the range of 20-80 run. BET experiments showed that-the final solids achieve much higher specific surface area (ssa) (30-61 m(2)/g) than similar solids which have been prepared by other methods. Catalytic tests in NO + CO reaction were made with the use of gases He/NO/CO in the ratio 96/2/2 with a total flow rate of 100 cm(3)/min. The full sequence of catalytic activity of tested solids is LCFOr > LSCFOr > LSFOr > LFOr and this sequence is in full agreement with the sequence of increment of ssa of the solids. (C) 2006 Elsevier B.V. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
perovskites, ce, sr, no plus co, reverse microemulsion, mixed oxides, oxidation, lamno3, fe, substitution, reduction, complex, oxygen
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000239288800012
http://ac.els-cdn.com/S0926860X06003887/1-s2.0-S0926860X06003887-main.pdf?_tid=2d94cdb2d0ae1d1e6b85ba563bcfdb3b&acdnat=1333036286_559d0a2eb343859c1842dd1519304f9a
http://ac.els-cdn.com/S0926860X06003887/1-s2.0-S0926860X06003887-main.pdf?_tid=2d94cdb2d0ae1d1e6b85ba563bcfdb3b&acdnat=1333036286_559d0a2eb343859c1842dd1519304f9a
Γλώσσα
en
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Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας