Microwave-assisted synthesis of palladium nanoparticles supported on graphene: A highly active and recyclable catalyst for carbon-carbon cross-coupling reactions

被引:346
作者
Siamaki, Ali R. [1 ,2 ]
Khder, Abd El Rahman S. [1 ]
Abdelsayed, Victor [1 ]
El-Shall, M. Samy [1 ,2 ]
Gupton, B. Frank [1 ,2 ]
机构
[1] Virginia Commonwealth Univ, Dept Chem, Box 2006, Richmond, VA 23284 USA
[2] Virginia Commonwealth Univ, Dept Chem Engn, Richmond, VA 23284 USA
基金
美国国家科学基金会;
关键词
Heterogeneous catalysis; Graphene; Palladium nanoparticles; Cross-coupling reactions; Suzuki coupling; Heck cross-coupling; GRAPHITE OXIDE; PD; TRANSPARENT; REDUCTION; FILMS;
D O I
10.1016/j.jcat.2010.12.003
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
We have developed an efficient method to generate highly active Pd nanoparticles supported on graphene (Pd/G) by microwave-assisted chemical reduction of the corresponding aqueous mixture of a palladium salt and dispersed graphite oxide (GO) sheets. The Pd/G demonstrated excellent catalytic activity for the carbon-carbon cross-coupling reactions (Suzuki, and Heck) with a broad range of utility under ligand-free ambient conditions in an environmentally friendly solvent system. It also offers a remarkable turnover frequency (108,000 h(-1)) observed in the microwave-assisted Suzuki cross-coupling reactions with easy removal from the reaction mixture, recyclability with no loss of activity, and significantly better performance than the well-known commercial Pd/C catalyst. The catalyst was fully characterized by a variety of spectroscopic techniques including X-ray diffraction (XRD), Raman, TGA, electron microscopy (SEM, TEM), and X-ray photoelectron spectroscopy (XPS). The remarkable reactivity of the Pd/G catalyst toward Suzuki cross-coupling reactions is attributed to the high degree of the dispersion and concentration of Pd(0) nanoparticles supported on graphene sheets with small particle size of 7-9 nm due to an efficient microwave-assisted reduction method. (c) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码:1 / 11
页数:11
相关论文
共 65 条
[1]  
ABDELSAYED V, 2009, J CHEM SOC, V21, P2825
[2]  
ABDELSAYED V, 2008, ACS SYM SER, P996
[3]   Honeycomb Carbon: A Review of Graphene [J].
Allen, Matthew J. ;
Tung, Vincent C. ;
Kaner, Richard B. .
CHEMICAL REVIEWS, 2010, 110 (01) :132-145
[4]   Microwave-promoted Heck coupling using ultralow metal catalyst concentrations [J].
Arvela, RK ;
Leadbeater, NE .
JOURNAL OF ORGANIC CHEMISTRY, 2005, 70 (05) :1786-1790
[5]   The heck reaction as a sharpening stone of palladium catalysis [J].
Beletskaya, IP ;
Cheprakov, AV .
CHEMICAL REVIEWS, 2000, 100 (08) :3009-3066
[6]  
BERCIAUD S, 2009, J CHEM SOC, V9, P346
[7]  
BHANAGE BM, 2001, J CHEM SOC, V43, P315
[8]  
BUCHWALD SL, 2008, J CHEM SOC, V41, P1439
[9]   Are heterogeneous catalysts precursors to homogeneous catalysts? [J].
Davies, IW ;
Matty, L ;
Hughes, DL ;
Reider, PJ .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (41) :10139-10140
[10]   Heterogeneously catalysed Heck reaction using palladium modified zeolites [J].
Djakovitch, L ;
Koehler, K .
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 1999, 142 (02) :275-284