کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10566313 | 972314 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural analysis of sonochemically prepared Au/Pd nanoparticles dispersed in porous silica matrix
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural analysis of sonochemically prepared Au/Pd nanoparticles dispersed in porous silica matrix Structural analysis of sonochemically prepared Au/Pd nanoparticles dispersed in porous silica matrix](/preview/png/10566313.png)
چکیده انگلیسی
Bimetallic Au/Pd nanoparticles supported on a silica matrix were prepared by an ultrasonic technique. The samples heat-treated at 100, 200, 300 and 400 °C were examined with techniques of XRD (X-ray diffraction), TEM and XAS (X-ray absorption spectrometry) for studying correlation between their structure and the catalytic activity of hydrogenation of cyclohexene. Even after the heat treatment at 400 °C, the particles were smaller than 20 nm and well dispersed in the matrix without agglomeration nor sintering. Results of the XRD, TEM and XAS indicated that the as-prepared particles have a core/shell structure of Au/Pd and transform into a random alloy at 300 °C. The catalysis seemed to be deactivated by alloying.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 12, Issue 4, March 2005, Pages 249-254
Journal: Ultrasonics Sonochemistry - Volume 12, Issue 4, March 2005, Pages 249-254
نویسندگان
Takashi Nakagawa, Hiroaki Nitani, Shuji Tanabe, Kenji Okitsu, Satoshi Seino, Yoshiteru Mizukoshi, Takao A. Yamamoto,