Simultaneous generation of mild acidic functionalities and small supported Ir NPs from alumina-supported well-defined iridium siloxide

We report the simultaneous formation of small Ir nanoparticles and silica–alumina from a well-defined iridium siloxide precursor grafted on alumina. Treatment of the alumina-supported iridium surface complex with H2 leads to the formation of small and narrowly dispersed metal nanoparticles (0.7 ± 0.2 nm) and to the decomposition of the siloxide ligand thus forming an aluminosilicate layer at the particle–support interface. The presence of both acid and metallic functionalities is accessed by IR, XAS, NMR, and XPS spectroscopies as well as microscopy and chemisorption studies. This material catalyzes the hydrogenolysis/hydroisomerization of ethylcyclohexane, thus showing its bifunctional nature.


Publié dans:
Journal of Catalysis, 321, 81-89
Année
2015
Publisher:
Elsevier
ISSN:
0021-9517
Mots-clefs:
Laboratoires:




 Notice créée le 2014-11-26, modifiée le 2018-09-13


Évaluer ce document:

Rate this document:
1
2
3
 
(Pas encore évalué)