کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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61896 | 47611 | 2010 | 7 صفحه PDF | دانلود رایگان |
A series of Pd and Pd/Au alloy nanoparticles (NPs) with narrow size distribution were encapsulated or stabilized by G4-poly (amido-amine) (G4-PAMAM, G represents the generation) planted in SBA-15. Monodisperse NPs are uniformly distributed in channels of SBA-15 as observed by TEM images. HRTEM, ICP and EDS results confirm the alloy structure of bimetallic NPs. A combination of N2 adsorption–desorption analysis, ICP and GC was used to optimize the best amount of metal precursors to form catalysts. The as-prepared catalyst manifests outstanding activity and recyclability in microwave-assisted Suzuki–Miyaura coupling reaction when compared with commercial Pd/C. Meanwhile, Pd/Au alloy NPs exhibit higher activity than monometallic ones in catalyzing the coupling between aryl bromide/aryl chloride and arylboronic acid. The mechanism of the improvement of catalytic performance is discussed.
A series of noble NPs with narrow size distribution were successfully stabilized in SBA-15.Figure optionsDownload high-quality image (69 K)Download as PowerPoint slide
Journal: Journal of Catalysis - Volume 270, Issue 2, 1 April 2010, Pages 268–274