کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
45890 46426 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen-doped carbon catalysts derived from ionic liquids in the presence of transition metals for the oxygen reduction reaction
ترجمه فارسی عنوان
کاتالیزورهای کربن نیتروژن دوگانه مشتق شده از مایعات یونی در حضور فلزات گذار برای واکنش کاهش اکسیژن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Ionic liquids are promising precursors for nitrogen-doped carbon catalyst for ORR.
• Use of transition metal in the pyrolysis of IL is important for high ORR activity.
• The graphitic-N content in the sp2-carbon network is key factor for high ORR.
• Co is an effective metal compared to Ni for nitrogen-doped carbon catalyst.

Nitrogen-doped carbon catalysts for the oxygen reduction reaction (ORR) were synthesized by the pyrolysis of ionic liquids (IL), which are precursors of both nitrogen and carbon, using a silica hard template in the presence of a transition metal. From the linear sweep voltammogram recorded in an acidic solution, the ORR activity of the nitrogen-doped carbon catalysts increased significantly after the addition of the transition metal during the pyrolysis of the IL. From XPS-N 1s analysis, the introduction of the transition metal positively contributes to the formation of graphitic-N, which is known to be an active site for the ORR. The results of XPS-C 1s suggest a strong correlation between the sp2-carbon network and the ORR activity. Co is a more effective metal compared to Ni due to the creation of a higher degree of sp2-carbon networks for fast electron transfer during the ORR. Based on the quantitative analysis of the experimental results, the IL is a promising precursor for nitrogen-doped carbon catalysts, and the addition of a transition metal is essential for improved activity of the ORR.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volumes 158–159, October 2014, Pages 355–360
نویسندگان
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