Synthesis, characterization, and catalytic performance of highly dispersed supported nickel catalysts from Ni – Al layered double hydroxides / Jia Wang in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011)  

Synthesis, characterization, and catalytic performance of highly dispersed supported nickel catalysts from Ni – Al layered double hydroxides [texte imprimé] / Jia Wang, Auteur ; Guoli Fan, Auteur ; Hui Wang, Auteur . - 2012 . - pp. 13717–13726.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13717–13726

Mots-clés :	Catalysts Hydroxides
Résumé :	Highly dispersed nickel nanoparticles were successfully prepared by reduction of Ni–Al layered double hydroxide precursor (NiAl-LDH) supported on nitric acid modified carbon nanotubes (HCNTs). The physicochemical properties of materials were investigated by powder X-ray diffraction (XRD), temperature programmed reduction (TPR), temperature programmed decomposition (TPDE), temperature programmed desorption (TPD), transmission electron microscopy (TEM), low-temperature nitrogen adsorption–desorption experiments, and X-ray photoelectron spectroscopy (XPS). The results revealed that in the synthesis process of NiAl-LDH and HCNTs composite, l-cysteine could improve the attachment of NiAl-LDH on the HCNTs as bridging linker and inhibit the growth of NiAl-LDH crystallites, thus leading to the formation of highly dispersed and uniform Ni nanoparticles with the small particle sizes. Compared with HCNTs-supported Ni catalyst prepared without the addition of l-cysteine, this highly dispersed Ni catalyst exhibited enhanced catalytic performance in liquid phase hydrogenation of o-chloronitrobenzene to o-chloroaniline.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie2015087