کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5148270 | 1497365 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Three-dimensional structure of WS2/graphene/Ni as a binder-free electrocatalytic electrode for highly effective and stable hydrogen evolution reaction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Tungsten disulfide (WS2) has attracted much attention as the promising electrocatalyst for hydrogen evolution reaction (HER). Herein, the three-dimensional (3D) structure electrode composed of WS2 and graphene/Ni foam has been demonstrated as the binder-free electrode for highly effective and stable HER. The overpotential of 3D WS2/graphene/Ni is 87Â mV at 10Â mAÂ cmâ2, and the current density is 119.1Â mAÂ cmâ2 at 250Â mV overpotential, indicating very high HER activity. Moreover, the current density of 3D WS2/graphene/Ni at 250Â mV only decreases from 119.1 to 110.1Â mAÂ cmâ2 even after 3000 cycles, indicating a good stability. The high HER performance of 3D WS2/graphene/Ni binder-free electrode is superior than mostly previously reported WS2-based catalysts, which is attributed to the unique graphene-based porous and conductive 3D structure, the high loading of WS2 catalysts and the robust contact between WS2 and 3D graphene/Ni backbones. This work is expected to be beneficial to the fundamental understanding of both the electrocatalytic mechanisms and, more significantly, the potential applications in hydrogen economy for WS2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 12, 23 March 2017, Pages 7811-7819
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 12, 23 March 2017, Pages 7811-7819
نویسندگان
Fei Qi, Pingjian Li, Yuanfu Chen, Binjie Zheng, Jingbo Liu, Jinhao Zhou, Jiarui He, Xin Hao, Wanli Zhang,