کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5478793 1399281 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Co/N-C nanotubes with increased coupling sites by space-confined pyrolysis for high electrocatalytic activity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Co/N-C nanotubes with increased coupling sites by space-confined pyrolysis for high electrocatalytic activity
چکیده انگلیسی
Searching low cost and non-precious metal catalysts for high-performance oxygen reduction reaction is highly desired. Herein, Co nanoparticles embedded in nitrogen-doped carbon (Co/N-C) nanotubes with internal void space are successfully synthesized by space-confined pyrolysis, which effectively improve the cobalt loading content and restrict the encapsulated particles down to nanometer. Different from the typical conformal carbon encapsulation, the resulting Co/N-C nanotubes possess more cobalt nanoparticles embedded in the nanotubes, which can provide more coupling sites and active sites in the oxygen reduction reaction (ORR). Moreover, the one-dimensional and porous structure provides a high surface area and a fast electron transfer pathway for the ORR. And the Co/N-C electrode presents excellent electrocatalytic ORR activity in terms of low onset potential (30 mV lower than that of Pt/C), small Tafel slop (45.5 mV dec−1) and good durability (88.5% retention after 10,000 s).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Green Energy & Environment - Volume 2, Issue 1, January 2017, Pages 23-29
نویسندگان
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