Title
Ag nanoparticles on mixed <tex>$Al_{2}O_{3}-Ga_{2}O_{3}$</tex> supports as catalysts for the N-alkylation of amines with alcohols Ag nanoparticles on mixed <tex>$Al_{2}O_{3}-Ga_{2}O_{3}$</tex> supports as catalysts for the N-alkylation of amines with alcohols
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Chemistry
Biology
Source (journal)
Applied catalysis : A : general. - Amsterdam
Volume/pages
469(2014) , p. 373-379
ISSN
0926-860X
ISI
000329266500045
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The combination of AgNO3 with NaH results in Ag nanoparticles that can selectively perform alcohol aminations under mild reaction conditions (110 °C). NaH not only serves as a reducing agent for the Ag salt, but also activates the alcohol for dehydrogenation to the corresponding ketone/aldehyde. The stability of the particles can be improved by immobilizing them onto mixed Al2O3Ga2O3 supports; the combination of Ga and Al provides materials with stronger Lewis acidic sites compared to pure alumina or gallium oxide supports. This leads to catalysts with enhanced activities, without the necessity of adding external Lewis acids. Detailed TEM characterization also reveals a close interaction between the Ag NPs and the gallium oxide phase. The obtained catalysts are recyclable and show activity for the alcohol amination using a variety of aliphatic and aromatic amines under mild conditions.
E-info
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