Premium
Colloidal Noble‐Metal and Bimetallic Alloy Nanocrystals: A General Synthetic Method and Their Catalytic Hydrogenation Properties
Author(s) -
Song Shuyan,
Liu Ruixia,
Zhang Yu,
Feng Jing,
Liu Dapeng,
Xing Yan,
Zhao Fengyu,
Zhang Hongjie
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200903279
Subject(s) - bimetallic strip , materials science , nanocrystal , noble metal , catalysis , alloy , chemical engineering , thermal decomposition , supercritical fluid , nanoparticle , metal , dispersity , nanotechnology , metallurgy , organic chemistry , chemistry , polymer chemistry , engineering
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, scCO 2 ). Interestingly, the catalysts performed differently to each other when they were in scCO 2 owing to the different morphology, which should be readily optimized for further use.