کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9617533 | 49164 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Platinum nanoparticles encapsulated in mesoporous silica: Preparation, characterisation and catalytic activity in toluene hydrogenation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Platinum nanoparticles encapsulated in mesoporous silica: Preparation, characterisation and catalytic activity in toluene hydrogenation Platinum nanoparticles encapsulated in mesoporous silica: Preparation, characterisation and catalytic activity in toluene hydrogenation](/preview/png/9617533.png)
چکیده انگلیسی
The material was tested in toluene hydrogenation as a model reaction and the catalytic activity was compared with a conventional Pt supported on SBA-15, prepared using the incipient wetness technique. The conventional catalyst was considerably more active in the toluene hydrogenation due to a higher Pt dispersion, as measured by hydrogen chemisorption, but the turnover frequencies were comparable. There is some discrepancy between the Pt particle size as observed by TEM and the chemisorption data. This is probably caused by formation of agglomerates of Pt particles, or that the Pt active sites are blocked, e.g. by a remaining copolymer layer on the surface of the particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 86, Issues 1â3, 28 November 2005, Pages 198-206
Journal: Microporous and Mesoporous Materials - Volume 86, Issues 1â3, 28 November 2005, Pages 198-206
نویسندگان
Svatopluk Chytil, Wilhelm R. Glomm, Elisabeth Vollebekk, HÃ¥kon Bergem, John Walmsley, Johan Sjöblom, Edd A. Blekkan,