کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1490629 | 992329 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electroless preparation and characterization of Ni–B nanoparticles supported on multi-walled carbon nanotubes and their catalytic activity towards hydrogenation of styrene Electroless preparation and characterization of Ni–B nanoparticles supported on multi-walled carbon nanotubes and their catalytic activity towards hydrogenation of styrene](/preview/png/1490629.png)
Nickel–boron (Ni–B) nanoparticles supported on multi-walled carbon nanotubes (MWCNTs) were successfully synthesized through an electroless deposition process using the plating bath with sodium borohydride as a reducing agent. The structural and morphological analyses using field-emission scanning electron microscopy, X-ray diffractometry and high-resolution transmission electron microscopy have shown that the Ni–B nanoparticles deposited on the sidewalls of MWCNTs are fine spheres comprised of amorphous structure with the morphologically unique fine-structure like flowers, and homogenously dispersed with a narrow particle size distribution centered at around 60 nm diameter. The catalytic activity of MWCNT/Ni–B nanoparticles was evaluated with respect to hydrogenation of styrene. The hydrogenation catalyzed by MWCNT-supported Ni–B nanoparticles has been found to make styrene selectively converted into ethylbenzene. The highest conversion reaches 99.8% under proper reaction conditions, which demonstrates the high catalytic activity of MWCNT/Ni–B nanoparticles.
The MWCNT/Ni–B catalyst has been successfully prepared by an electroless deposition process. The Ni–B nanoparticles on the supporter are amorphous and are well-distributed. The catalytic conversion towards hydrogenation of styrene shows excellent catalytic activity of the obtained materials.Figure optionsDownload as PowerPoint slideHighlights
► A two-step treatment of MWCNTs enabled the homogeneous growth of Ni–B nanoparticles.
► Ni–B nanoparticles were amorphous with an average size of 60 nm.
► There were electron transfer between Ni and B.
► The catalyst had excellent catalytic activity towards hydrogenation of styrene.
Journal: Materials Research Bulletin - Volume 47, Issue 2, February 2012, Pages 338–343