کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1289839 | 973311 | 2009 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Multichelate-functionalized carbon nanospheres used for immobilizing Pt catalysts for fuel cells
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Multichelate-functionalized carbon nanospheres used for immobilizing Pt catalysts for fuel cells Multichelate-functionalized carbon nanospheres used for immobilizing Pt catalysts for fuel cells](/preview/png/1289839.png)
چکیده انگلیسی
We have developed a covalent/coordinate strategy to immobilize Pt nanocrystals (average diameter 3.5Â nm) on multichelate-functionalized carbon nanospheres (CNS). The method involves the covalent grafting of triethylenetetramine onto the CNS' surface and the coordination of well-structured ethylenimine chains to Pt ions or atoms. The Pt-CNSs interface is probed with X-ray photoelectron spectroscopy to elucidate the nature of the chemical binding of ethylenimine to Pt. The Pt particle deposition can be easily controlled; to form separated and uniform Pt nanocrystals, or densely loaded Pt particles, depending on the molar ratio of Pt to amine groups. The Pt particle layer covered carbon exhibits significantly higher activity toward methanol oxidation (0.75Â AÂ mgâ1Â cmâ2) than commercial E-TEK 40% Pt loaded carbon with the corresponding data of 0.51Â AÂ mgâ1Â cmâ2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 194, Issue 1, 20 October 2009, Pages 234-242
Journal: Journal of Power Sources - Volume 194, Issue 1, 20 October 2009, Pages 234-242
نویسندگان
P.-L. Kuo, W.-F. Chen, C.-Y. Lin,