کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5145155 1497336 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of W2N nanorods-graphene hybrid structure with enhanced oxygen reduction reaction performance
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Synthesis of W2N nanorods-graphene hybrid structure with enhanced oxygen reduction reaction performance
چکیده انگلیسی
In this work, a novel hybrid structure of tungsten nitride nanorods upon graphene nanosheets was obtained by synthesizing WOx nanorods/graphene oxide (GO) nanosheets followed by hydrogenation and nitridization treatment. Electron microscopy and X-ray diffraction results indicated that the hybrid was composed of W2N nanorods and reduced graphene oxide nanosheets. Surface chemical characteristics of the hybrid were characterized by X-ray photoelectron spectroscopy (XPS) and its electrocatalytic activities were evaluated using a rotating disk electrode measurement system. Compared to the WO3 nanorods-GO hybrid, onset potential of the W2N nanorods-rGO hybrid for oxygen reduction reaction (ORR) was shifted from 0.6 V to 0.71 V, and the limiting current density increased by 1.4 times, exhibiting significantly enhanced electrocatalytic performance, which rendered the W2N-rGO hybrid as a potential non-precious-metal ORR catalyst in fuel cells and metal air battery applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 41, 12 October 2017, Pages 25924-25932
نویسندگان
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