Article (Scientific journals)
Synthesis of transition metal-doped carbon xerogels by cogelation
Job, Nathalie; Pirard, René; Vertruyen, Bénédicte et al.
2007In Journal of Non-Crystalline Solids, 353 (24-25), p. 2333-2345
Peer Reviewed verified by ORBi
 

Files


Full Text
Job 07 JoNCS.pdf
Publisher postprint (867.86 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
carbon; TEM/STEM; nanoparticles; sol gels (xerogels); X-ray diffraction; transition metals
Abstract :
[en] The cogelation process, i.e. the co-polymerization of a metal complex with the gel precursors, was used for the synthesis of transition metal-doped resorcinol-formaldehyde gels. The aim of this process is to anchor the metal to the polymer so that the former does not sinter during the pyrolysis step leading to porous carbon. Cu-, Ni-, Pd- or Pt-loaded gels were prepared by this technique. After drying and pyrolysis, Pd and Pt were obtained as metal nanoparticles (2-5 nm in diameter) inserted in the carbon nodules, when the complexing agent and the synthesis conditions were well chosen. These small metal particles were inaccessible to reactive gases, probably due to carbon deposit at the metal surface during pyrolysis: CO almost did not chemisorb. Oxidation of the support or pyrolysis under reductive atmosphere was applied to the metal-doped gels and carbons in order to make the surface of the metal particles accessible, but these treatments develop the macropores only. The cogelation process is then suitable to prepare metal nanoparticles protected from the outside by encapsulation in the carbon matrix. (C) 2007 Elsevier B.V. All rights reserved.
Disciplines :
Materials science & engineering
Author, co-author :
Job, Nathalie  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
Pirard, René ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
Vertruyen, Bénédicte  ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie inorganique structurale
Colomer, Jean-Francois
Marien, José ;  Université de Liège - ULiège > Département de chimie appliquée > Chimie générale et chimie physique
Pirard, Jean-Paul ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Chimie physique appliquée
Language :
English
Title :
Synthesis of transition metal-doped carbon xerogels by cogelation
Publication date :
2007
Journal title :
Journal of Non-Crystalline Solids
ISSN :
0022-3093
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
353
Issue :
24-25
Pages :
2333-2345
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 25 August 2009

Statistics


Number of views
23 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
16
Scopus citations®
without self-citations
16
OpenCitations
 
13

Bibliography


Similar publications



Contact ORBi