کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8147946 1524155 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen doped carbon nano-onions as efficient and robust electrocatalysts for oxygen reduction reactions
ترجمه فارسی عنوان
نیتروژن نانو ذرات کربنی به عنوان الکتروکاتورالیست قوی و کارآمد برای واکنش های اکسیژن کاهش می یابد
کلمات کلیدی
الکتروتالیز، واکنش کاهش اکسیژن، کربن نانو ذرت، نانو مواد کربن، دوپینگ نیتروژن،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
We investigated synthesis and electrocatalytic performance of metal-free, nitrogen-doped carbon nano-onions (N-CNOs) for oxygen reduction reactions in alkaline electrolyte. N-CNOs were prepared by chemical oxidation of nanodiamond-derived carbon nano-onions (ox-CNOs), followed by thermal annealing with urea under the flow of argon gas. The chemical oxidation step was critical to successfully internalize nitrogen atoms into carbon network. Morphology, microstructure, and chemical states of carbon nano-onions (CNOs), ox-CNOs, and N-CNOs were characterized by transmission electron microscopy (TEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Electrocatalytic activity of pristine and modified CNOs was characterized by a series of electrochemical measurements. Electrochemical characterizations were done with thin film electrodes of CNOs mounted on a glassy carbon disk. Compared to CNOs and ox-CNOs, N-CNOs showed remarkably enhanced electron-transfer kinetics with the 4-electron transfer as a dominant reaction pathway. Overall, N-CNOs exhibited electrochemical characteristics comparable to commercial Pt/C catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 18, Issue 4, April 2018, Pages 417-423
نویسندگان
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