Facile synthesis of palladium nanoparticles supported on silica: An efficient phosphirie-free heterogeneous catalyst for Suzuki coupling in aqueous media

被引：22
作者：
Sahu, Debojeet [1 ]
Silva, Ana R. [2 ]
Das, Pankaj [1 ]
机构：
[1] Dibrugarh Univ, Dept Chem, Dibrugarh, Assam, India
[2] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Chem, Aveiro, Portugal
来源：
CATALYSIS COMMUNICATIONS | 2016年 / 86卷
关键词：
Palladium nanoparticles; N-ligand; Heterogeneous catalyst; Suzuki-coupling; Aqueous media; Aryl chloride; MIYAURA REACTION; GEL APPLICATION; PD; CARBON; WATER; AMINE;
D O I：
10.1016/j.catcom.2016.08.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A convenient one-step method for synthesizing highly dispersed palladium nanoparticles supported on silica, without taking assistance from any external reductant or stabilizer, has been developed. The supported nanoparticles were characterized by N-2-adsorption desorption, XRD, HRTEM, SEM-EDX, XPS, ICP analyses and applied as catalyst for Suzuki-Miyaura reactions of aryl halides. The reactions with aryl bromides were performed in neat water at room temperature; while the reactions with aryl chlorides were conducted in aqueous-ethanol at 90 degrees C. The catalyst could be reused at least three times without compromising with its activity, however from the fourth cycle a progressive decrease in yield was noticed. No aggregation of NPs was observed by the TEM analysis of the six-time used catalyst. (C) 2016 Elsevier B.V. All rights reserved.
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收藏
页码：32 / 35
页数：4
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