Article (Scientific journals)
Determination of surface composition of alloy nanoparticles and relationships with catalytic activity in Pd-Cu/SiO2 cogelled xerogel catalysts
Lambert, Stéphanie; Heinrichs, Benoît; Brasseur, Alain et al.
2004In Applied Catalysis A: General, 270 (1-2), p. 201-208
Peer Reviewed verified by ORBi
 

Files


Full Text
Lambert 2004-AC-A-G.pdf
Publisher postprint (284.65 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
sol-gel process; Pd-Cu/SiO2 catalysts; Pd-Cu alloy nanoparticles; surface composition; CO chemisorption; TEM; XRD; hydrodechlorination
Abstract :
[en] The combination of results from carbon monoxide chemisorption, X-ray diffraction, and transmission electron microscopy allowed calculating the surface composition of the palladium-copper nanoparticles in Pd-Cu/SiO2 cogelled xerogel catalysts. Values obtained indicate a very pronounced surface enrichment with copper. Surface compositions obtained with this method, which combines three different experimental techniques, are in agreement with the literature data previously obtained for surface segregation in Pd-Cu/SiO2 catalysts by other techniques as low energy ion scattering and X-ray photoelectron spectroscopy. While 1,2-dichloroethane hydrodechlorination over pure palladium mainly produces ethane, increasing copper content in bimetallic catalysts results in an increase in ethylene selectivity, to reach 100% in ethylene selectivity for the sample containing 1.4 wt.% of palladium and 3.0 wt.% of copper. (C) 2004 Elsevier B.V. All rights reserved.
Disciplines :
Chemistry
Materials science & engineering
Author, co-author :
Lambert, Stéphanie  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie Chimique - Chimie physique appliquée
Heinrichs, Benoît ;  Université de Liège - ULiège > Département de chimie appliquée > Génie Chimique - Chimie physique appliquée
Brasseur, Alain;  Université de Liège - ULiège > Département de Chimie appliquée > Génie Chimique - Chimie physique appliquée
Rulmont, André ;  Université de Liège - ULiège > Chimie inorganique structurale
Pirard, Jean-Paul ;  Université de Liège - ULiège > Département de chimie appliquée > Génie Chimique - Chimie physique appliquée
Language :
English
Title :
Determination of surface composition of alloy nanoparticles and relationships with catalytic activity in Pd-Cu/SiO2 cogelled xerogel catalysts
Publication date :
30 August 2004
Journal title :
Applied Catalysis A: General
ISSN :
0926-860X
eISSN :
1873-3875
Publisher :
Elsevier Science Bv, Amsterdam, Netherlands
Volume :
270
Issue :
1-2
Pages :
201-208
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 27 August 2009

Statistics


Number of views
54 (7 by ULiège)
Number of downloads
1 (1 by ULiège)

Scopus citations®
 
42
Scopus citations®
without self-citations
37
OpenCitations
 
39

Bibliography


Similar publications



Contact ORBi