کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
217960 463176 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Control of nitrogen content and its effects on the electrochemical behavior of nitrogen-doped carbon nanofibers
ترجمه فارسی عنوان
کنترل محتوای نیتروژن و اثرات آن بر رفتار الکتروشیمیایی نانوسایل کربن نیتروژن کربن
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• A nitrogen content of the N-CNFs is controlled by the composition of reactant gas
• Electrochemical capacitance and ORR activity are enhanced by doping nitrogen
• Pyridinic nitrogen has the most significant influence on electrochemical behavior

Nitrogen-doped carbon nanofibers (N-CNFs) with different nitrogen contents were synthesized from vaporized acetonitrile as a simultaneous carbon and nitrogen source via the chemical vapor deposition method. N-CNF synthesis was conducted at 640 °C for 2 h, and the ratio of nitrogen and hydrogen mixture as reactant gas was adjusted to control the nitrogen content in the N-CNFs. The amount of hydrogen in the reactant gas was varied in the range from 0 to 40 mL min− 1. The physical and electrochemical properties of the N-CNFs were characterized. The content of introduced nitrogen decreased with the ratio of supplied hydrogen, as opposed to the growth yield of the N-CNFs. Additionally, the nitrogen content and chemical states of the N-CNFs were examined and compared to reveal their correlations with the electrochemical behavior. The N-CNFs were found to have a noticeable electrochemical behavior such as capacitance and oxygen reduction reaction activity that was determined by the total nitrogen contents, especially those of pyridinic-nitrogen.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 768, 1 May 2016, Pages 34–40
نویسندگان
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