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Silver nanoparticles supported on passivated silica: preparation and catalytic performance in alkyne semi-hydrogenation.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2014, Vol. 43 Issue 40, p15138-15142, 5p
- Publication Year :
- 2014
-
Abstract
- Herein, we report the preparation of small and narrowly distributed (2.1 ± 0.5 nm) Ag nanoparticles supported on passivated silica, where the surface OH groups are replaced by OSiMe<subscript>3</subscript> functionalities. This synthetic method involves the grafting of silver(I) bis(trimethylsilyl)amide ([AgN(SiMe<subscript>3</subscript>)<subscript>2</subscript>]<subscript>4</subscript>) on silica partially dehydroxylated at 700 °C, followed by a thermal treatment of the grafted complex under H<subscript>2</subscript>. The catalytic performance of this material was investigated in the semi-hydrogenation of propyne and 1-hexyne and compared with that of 2.0 ± 0.3 nm Ag nanoparticles supported on silica. Whilst surface passivation slightly decreases the activity in both reactions (by a factor 2-3), probably as a result of the decreased alkyne adsorption properties or the presence of less accessible active sites on the passivated support, the AgNP@SiO<subscript>2</subscript> catalysts demonstrate a remarkable selectivity for the production of alkenes. [ABSTRACT FROM AUTHOR]
- Subjects :
- SILVER nanoparticles
SILICA
ALKYNES
HYDROGENATION
CHEMICAL reactions
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 43
- Issue :
- 40
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 100112938
- Full Text :
- https://doi.org/10.1039/c4dt01320d