کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5366854 1388356 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modification of functionalized mesoporous silica on the formation and the catalytic performance of platinum nanocatalysts
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Modification of functionalized mesoporous silica on the formation and the catalytic performance of platinum nanocatalysts
چکیده انگلیسی

Several functionalized mesoporous silicas (MCM-41 and SBA-15 terminated with amino groups by multistep graft) are prepared and used as carriers for platinum nanoparticles. Modification of the grafted molecules is investigated on the component of the silicas and the formation of nanoparticles. Catalytic performance of the loaded platinum nanocatalysts is tested on selective hydrogenation of ortho-chloronitrobenzene (o-CNB). Results indicate that SBA-15 can be grafted with more amino groups than MCM-41. In most cases, small quantity of platinum precursor benefits the formation of small platinum nanoparticles on the functionalized silicas. The platinum nanocatalysts loaded on the one-step grafted silicas hold better catalytic activity and slightly lower selectivity to ortho-chloroaniline (o-CAN) than those loaded on the two-step grafted silicas. Besides the advantage of reuse, the loaded platinum catalysts on the functionalized silicas have similar catalytic property as the colloidal platinum nanocatalysts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 17, 15 June 2009, Pages 7672-7678
نویسندگان
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