کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7854348 | 1508878 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Uniform nitrogen and sulfur co-doped carbon nanospheres as catalysts for the oxygen reduction reaction
ترجمه فارسی عنوان
نانوسپورهای کربنی با دوز نیتروژن و گوگرد یکپارچه به عنوان کاتالیزور برای واکنش کاهش اکسیژن
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
Uniform nitrogen and sulfur co-doped carbon nanospheres with an average diameter of approximately 200Â nm were prepared using sulfur and polyacrylonitrile as precursors. The materials were characterized using scanning electron microscopy, transmission electron microscopy, elemental analysis, and X-ray photoelectron spectroscopy. The characterization results suggest the as-prepared materials had uniform, porous, nanospherical morphologies and high surface areas. For the typical sample containing 9.5% sulfur, the surface area is up to 653Â m2Â gâ1. The catalysts exhibited enhanced catalytic activity, outstanding long-term stability, and excellent methanol tolerance in an alkaline medium. Significantly, the sulfur addition was found to be vital in improving materials' catalytic performance through preventing aggregation of the nanospheres, constructing porous structures, increasing the surface area, and participating in the formation of active sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbon - Volume 69, April 2014, Pages 294-301
Journal: Carbon - Volume 69, April 2014, Pages 294-301
نویسندگان
Chenghang You, Shijun Liao, Hualing Li, Sanying Hou, Hongliang Peng, Xiaoyuan Zeng, Fangfang Liu, Ruiping Zheng, Zhiyong Fu, Yingwei Li,