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Nickel – silicon intermetallics with enhanced selectivity in hydrogenation reactions of cinnamaldehyde and phenylacetylene / Xiao Chen in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3604-3611 Titre : Nickel – silicon intermetallics with enhanced selectivity in hydrogenation reactions of cinnamaldehyde and phenylacetylene Type de document : texte imprimé Auteurs : Xiao Chen, Auteur ; Miao Li, Auteur ; Jingchao Guan, Auteur Année de publication : 2012 Article en page(s) : pp. 3604-3611 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Hydrogenation Résumé : Nickel―silicon intermetallics have been prepared by a direct silicification method using SiH4 as the silicon source. The prepared nickel―silicon intermetallics were characterized by X-ray diffraction, transmission electron microscopy, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and CO chemisorption measurements. The catalytic hydrogenation of cinnamaldehyde and phenylacetylene over the nickel―silicon intermetallics was investigated. Nickel―silicon intermetallics presented much higher selectivity to the intermediate product (hydrocinnamaldehyde) than monometallic nickel catalyst, which may be attributed to the repulsive force between the electronegative silicon atoms in the nickel―silicon intermetallics and oxygen atoms in the C=O bond of cinnamaldehyde. In addition, nickel-silicon intermetallics showed excellent selectivity for the hydrogenation of phenylacetylene to styrene (ca. 93%) due to the strong modification of the electronic structure derived from the interaction of nickel and silicon. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595787 [article] Nickel – silicon intermetallics with enhanced selectivity in hydrogenation reactions of cinnamaldehyde and phenylacetylene [texte imprimé] / Xiao Chen, Auteur ; Miao Li, Auteur ; Jingchao Guan, Auteur . - 2012 . - pp. 3604-3611. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3604-3611 Mots-clés : Hydrogenation Résumé : Nickel―silicon intermetallics have been prepared by a direct silicification method using SiH4 as the silicon source. The prepared nickel―silicon intermetallics were characterized by X-ray diffraction, transmission electron microscopy, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and CO chemisorption measurements. The catalytic hydrogenation of cinnamaldehyde and phenylacetylene over the nickel―silicon intermetallics was investigated. Nickel―silicon intermetallics presented much higher selectivity to the intermediate product (hydrocinnamaldehyde) than monometallic nickel catalyst, which may be attributed to the repulsive force between the electronegative silicon atoms in the nickel―silicon intermetallics and oxygen atoms in the C=O bond of cinnamaldehyde. In addition, nickel-silicon intermetallics showed excellent selectivity for the hydrogenation of phenylacetylene to styrene (ca. 93%) due to the strong modification of the electronic structure derived from the interaction of nickel and silicon. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595787