Supported gold based bimetallic nanoparticles catalyzed oxidation and C-C coupling reactions

Since Haruta et al.[1] have shown that gold nanoparticles have catalytic activity for CO oxidation at very low temperature, a lot of research groups were interested in the preparation of new catalysts based on supported metal... [ view full abstract ]

Since Haruta et al.[1] have shown that gold nanoparticles have catalytic activity for CO oxidation at very low temperature, a lot of research groups were interested in the preparation of new catalysts based on supported metal nanoparticules.
The majority of these studies focuses towards development of methods for preparing nanoparticles increasingly smaller, preparation and design of supported bimetallic nanoparticles and exploits the characteristics of these nanoparticles to catalyze different reactions.
Supported bimetallic nanoparticles have an important role to play as catalysts for different reaction. Indeed, according to the metal used, it is possible to prepare active, selective and stable catalysts for different reactions [2]
In this paper we report an overview of studies, made by our research group, on the preparation and characterization of supported bimetallic nano-catalysts Au-M/support (M= Co, Fe, Cr, Cu, Ni) and (Support = Al2O3, SiO2, TiO2). Different strategies were used to synthesize the catalysts. These catalysts were fully characterized by TEM, DRUV-vis, DRX, BET, FTIR.
The catalytic performances of these bimetallic nanoparticles were evaluated in the oxidation of cyclohexene[3] (scheme 1)

Scheme 1: Oxidation of Cyclohexene
and the synthesis of propargylamines via an A3 and AHA three component coupling reactions[4] (scheme 2)

Scheme 2: Synthesis of propargylamines by three component coupling reaction

[1] M. Haruta, T. Kobayashi, H. Sano, N. Yamada, Chem. Lett., 6 (1987) 405-408.
[2] M. Sankar, N. Dimitratos, P. J. Miedziak, P. P. Wells, C. J. Kielye, G.J. Hutchings, Chem. Soc. Rev. 41 (2012) 8099-8139.
[3] N. Ameur, A. Berrichi, S. Bedrane, R. Bachir, Adv. Mater. Res. (2014).
[4] A. Berrichi, R. Bachir, M. Benabdallah, N. Choukchou-Braham, Tetrahedron Lett. 56 (2015) 1302-1306.