Colloidal Noble‐Metal and Bimetallic Alloy Nanocrystals: A General Synthetic Method and Their Catalytic Hydrogenation Properties
- 25 May 2010
- journal article
- Published by Wiley in Chemistry – A European Journal
- Vol. 16 (21), 6251-6256
- https://doi.org/10.1002/chem.200903279
Abstract
A general single‐step strategy has been developed for the direct thermal decomposition of noble‐metal salts in octadecylamine to synthesize octahedron‐ and rod‐shaped noble‐metal aggregates and monodisperse noble‐metal or bimetallic alloy nanocrystals without introducing any additive into the system. It has presented a facile and economic way to fabricate these nanocrystals, especially alloy nanocrystals, which does not require a post‐synthesis solid‐state annealing process. The morphology of the nanocrystals can be easily controlled by tuning the synthetic temperature. Their ability to catalyze heterogeneous Suzuki coupling reactions has been investigated and showed satisfactory catalytic activity. The catalytic performance of the monometallic and bimetallic alloy nanocrystals were also evaluated in the selective hydrogenation of citral in a conventional organic solvent (toluene) and a green solvent (supercritical carbon dioxide, scCO2). Interestingly, the catalysts performed differently to each other when they were in scCO2 owing to the different morphology, which should be readily optimized for further use.Keywords
This publication has 57 references indexed in Scilit:
- Luminescent and Raman Active Silver Nanoparticles with Polycrystalline StructureJournal of the American Chemical Society, 2008
- Ag, Ag2S, and Ag2Se Nanocrystals: Synthesis, Assembly, and Construction of Mesoporous StructuresJournal of the American Chemical Society, 2008
- Mechanistic Studies on the Galvanic Replacement Reaction between Multiply Twinned Particles of Ag and HAuCl4 in an Organic MediumJournal of the American Chemical Society, 2007
- Polyol Synthesis of Platinum Nanostructures: Control of Morphology through the Manipulation of Reduction KineticsAngewandte Chemie, 2005
- Direct Synthesis of Narrowly Dispersed Silver Nanoparticles Using a Single-Source PrecursorLangmuir, 2003
- Catalysis and nanoscienceChemical Communications, 2003
- Synthesis of Monodisperse Palladium NanoparticlesNano Letters, 2003
- Ruthenium Nanoparticles: Size, Shape, and Self-AssembliesChemistry of Materials, 2002
- Mechanisms of the Shape Evolution of CdSe NanocrystalsJournal of the American Chemical Society, 2001
- Large clusters and colloids. Metals in the embryonic stateChemical Reviews, 1992