کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
67634 48489 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and catalytic studies of palladium nanoparticles stabilized by dendritic phosphine ligand-functionalized silica
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Preparation and catalytic studies of palladium nanoparticles stabilized by dendritic phosphine ligand-functionalized silica
چکیده انگلیسی

Silica is a prominently utilized heterogeneous metal catalyst support. Functionalization of the silica with poly(ether imine) based dendritic phosphine ligand was conducted, in order to assess the efficacy of the dendritic phosphine in reactions facilitated by a silica supported metal catalyst. The phosphinated poly(ether imine) (PETIM) dendritic ligand was bound covalently to the functionalized silica. For this purpose, the phosphinated dendritic ligand containing an amine at the focal point was synthesized initially. Complexation of the dendritic phosphine functionalized silica with Pd(COD)Cl2 yielded Pd(II) complex, which was reduced subsequently to Pd(0), by conditioning with EtOH. The Pd metal nanoparticle thus formed was characterized by physical methods, and the spherical nanoparticles were found to have >85% size distribution between 2 nm and 4 nm. The metal nanoparticle was tested as a hydrogenation catalyst of olefins. The catalyst could be recovered and recycled more than 10 times, without a loss in the catalytic efficiency.

Dendritic phosphine functionalized silica was prepared and complexed with Pd(II). Subsequent formation of Pd(0) nanoparticle within the functionalized silica and the catalytic activities of the nanoparticles in a hydrogenation reaction are reported.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 307, Issues 1–2, 15 July 2009, Pages 142–148
نویسندگان
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