کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7708101 | 1497321 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nitrogen-doped carbon active sites boost the ultra-stable hydrogen evolution reaction on defect-rich MoS2 nanosheets
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
It remains highly challenging to deploy noble-metal-free technologies for commercial hydrogen evolution reaction (HER) catalytic application. A facile strategy is developed in this work to boost the HER activity on non-noble MoS2 catalyst by taking advantage of the platinum-like behavior of nitrogen doped carbon (CN) active sites for catalyzing the process from H+ to H atom. By doping trace amount of CN with the defect-rich MoS2 nanosheet catalyst, the HER activity is significantly improved with the onset HER overpotential reduced to 50Â mV, close to the value observed for the platinum catalyst, and the operational overpotential at 10Â mA/cm2 decreases by 65Â mV. More importantly, with graphite as the counter electrode, stability of the catalyst is substantially improved. No activity decay is detected after 4000 cycles of cyclic voltammetry (CV) sweeping while the overpotential increment of the prisitine MoS2/C catalyst after 2000 cycles CV sweeping is high to ca. 15Â mV.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 4, 25 January 2018, Pages 2026-2033
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 4, 25 January 2018, Pages 2026-2033
نویسندگان
Weiwei Cai, Xingying Luo, Yao Jiang, Zhao Liu, Jing Li, Liang Ma, Jie Xiong, Zehui Yang, Hansong Cheng,