کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458089 | 1516163 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
MoS2 vertically grown on graphene with efficient electrocatalytic activity in Pt-free dye-sensitized solar cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
In this report, MoS2 nanosheets grown vertically on reduced graphene oxide (MoS2@RGO) were successfully prepared via a facile hydrothermal process, and then worked as counter electrode (CE) in dye-sensitized solar cells (DSSCs). The MoS2@RGO materials revealed enhanced electrocatalytic activity and stable chemical property for accelerating the reduction of Iâ/I3â redox couple. Cyclic voltammograms (CV) showed that the peak current density (JA) and peak spacing (Epp) of MoS2@RGO CE were smaller than Pt, MoS2, and RGO in DSSCs, owing to the superior carrier transfer properties of graphene, abundant catalytic active sites and low resistance of MoS2@RGO. Furthermore, the power conversion efficiency (PCE) of MoS2@RGO CE reached 6.82%, which is higher than that of Pt CE (6.44%). Electrical impedance spectroscopy (EIS) and tafel polarization were also investigated to demonstrate positive synergetic effect between MoS2 and RGO, as well as efficient electrocatalytic performance in Pt-free DSSCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 731, 15 January 2018, Pages 685-692
Journal: Journal of Alloys and Compounds - Volume 731, 15 January 2018, Pages 685-692
نویسندگان
Xianfeng Yuan, Xuemin Li, Xiao Zhang, Yun Li, Lu Liu,