Novel Metal Nanomaterials and Their Catalytic Applications

Abstract

Abstract:In the rapidly developing areas of nanotechnology, nano-scale materials as heterogeneous catalysts in the synthesis of organic molecules have gotten more and more attention. In this review, we will summarize the synthesis of several new types of noble metal nanostructures (FePt@Cu nanowires, Pt@Fe2O3 nanowires and bimetallic Pt@Ir nanocomplexes; Pt-Au heterostructures, Au-Pt bimetallic nanocomplexes and Pt/Pd bimetallic nanodendrites; Au nanowires, CuO@Ag nanowires and a series of Pd nanocatalysts) and their new catalytic applications in our group, to establish heterogeneous catalytic system in "green" environments. Further study shows that these materials have a higher catalytic activity and selectivity than previously reported nanocrystal catalysts in organic reactions, or show a superior electro-catalytic activity for the oxidation of methanol. The whole process might have a great impact to resolve the energy crisis and the environmental crisis that were caused by traditional chemical engineering. Furthermore, we hope that this article will provide a reference point for the noble metal nanomaterials' development that leads to new opportunities in nanocatalysis.

Cubic Palladium Nanorattles with Solid Octahedron Gold Core for Catalysis and Alkaline Membrane Fuel Cell Applications

“…These sites are generally bounded with the lower number of coordinated atoms (unsatisfied in term of valency) and hence considered as thermodynamically and catalytically more active as compared with the atom of other sites. In solid metallic nanocatalyst, these functionalities can be achieved by introducing sharp tips or corners and rough surfaces in their structures . Although such unique design like the presence of sharp tips and corners in nanostructures signifies the better catalytic activity of nanocatalyst, their corners and sharp tips turn blunt after each catalytic cycle, which causes a drastic decrease in the activity of nanocatalyst .…”

A microemulsion route to fabrication of mono and bimetallic Cu/Zn/γ-Al2O3 nanocatalysts for hydrogenation reaction

“…As it is confirmed one of the most important applications of the nanomaterials is using as catalyst. In recent years some valuable research and review articles have also been published to introduce catalytic applications of nanomaterials [6][7][8]. Obviously the catalytic phenomena related to the type of the materials component of the catalyst as well as surface and size of the materials.…”

Synthesis of propyl aminopyridine modified magnetite nanoparticles for cadmium (II) adsorption in aqueous solutions

“…Also, some studies show the applicability of magnetite modified carbon nanotubes for removal of dye pollutants from natural waste . Also, MNPs are used as catalyst in different organic synthesis, for example amino functionalized nano Fe 3 O 4 @SiO 2 as a magnetically green catalyst for the one‐pot synthesis of spirooxindoles under mild conditions …”

“…[26] Also, some studies show the applicability of magnetite modified carbon nanotubes for removal of dye pollutants from natural waste. [27,28] Also, MNPs are used as catalyst in different organic synthesis, [29][30][31][32][33] for example amino functionalized nano Fe 3 O 4 @SiO 2 as a magnetically green catalyst for the one-pot synthesis of spirooxindoles under mild conditions. [34] In this study, propyl aminopyridine functionalized MNPs were synthesized via chemical reaction of 2-aminopyridine with chloropropyl functionalized magnetite nanoparticles.…”