Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 349, Issue 2, Pages 613-619Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2010.06.009
Keywords
Pd-Fe; Hollow nanospheres; Vesicle template; Coupling reaction; Green chemistry
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Funding
- National Natural Science Foundation of China [20973113]
- 863 Project [2007AA03Z339]
- 973 Program [2009CB226106]
- Shanghai Government [09JC1411400, 09YZ158, S30406, 0852nm01000, 07dz22303]
- State Key Laboratory of Chemical Engineering [SKL-ChE-09CO3]
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Hollow Pd-Fe nanospheres were fabricated through a vesicle-assisted chemical reduction method. With the characterization of X-ray diffraction, selected area electron diffraction, X-ray photoelectron spectroscopy, scanning electron micrography, transmission electron micrography, and N-2 physisorption experiment, the resulting Pd-Fe material was identified to be hollow spherical with mesoporous shell. During aqueous Sonogashira-, Heck-, and Ullmann-type coupling reactions of aryl halide, the as-prepared hollow Pd-Fe nanospheres exhibited much higher activity than the dense counterpart nanoparticles. The enhanced reactivity was attributed to both the hollow chamber structure and the promotional effect of Fe-dopants, which provided more Pd active sites for the reactants. Moreover, this hollow material displayed other advantages such as low-cost, recyclability and easy experimental handling. (C) 2010 Elsevier Inc. All rights reserved.
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