Design of XS2 (X = W or Mo)-Decorated VS2 Hybrid Nano-Architectures with Abundant Active Edge Sites for High-Rate Asymmetric Supercapacitors and Hydrogen Evolution Reactions

被引:44
作者
Hussain, Sajjad [1 ,2 ]
Vikraman, Dhanasekaran [3 ]
Sarfraz, Maria [4 ]
Faizan, Muhammad [5 ]
Patil, Supriya A. A. [2 ]
Batoo, Khalid Mujasam [6 ]
Nam, Kyung-Wan [5 ]
Kim, Hyun-Seok [3 ]
Jung, Jongwan [1 ,2 ]
机构
[1] Sejong Univ, Hybrid Mat Ctr HMC, Seoul 05006, South Korea
[2] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, Seoul 05006, South Korea
[3] Dongguk Univ Seoul, Div Elect & Elect Engn, Seoul 04620, South Korea
[4] COMSATS Inst Informat Technol, Dept Phys, Lahore 54000, Pakistan
[5] Dongguk Univ Seoul, Dept Energy & Mat Engn, Seoul 04620, South Korea
[6] King Saud Univ, King Abdullah Inst Nanotechnol, Riyadh 11451, Saudi Arabia
基金
新加坡国家研究基金会;
关键词
density functional theory; hydrogen evolution reaction (HER); interfaces; supercapacitors; MOS2; NANOSHEETS; FACILE SYNTHESIS; EFFICIENT; ELECTRODE; COMPOSITE; SPECTRA; SURFACE;
D O I
10.1002/smll.202205881
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Two-dimensional layered transition metal dichalcogenides have emerged as promising materials for supercapacitors and hydrogen evolution reaction (HER) applications. Herein, the molybdenum sulfide (MoS2)@vanadium sulfide (VS2) and tungsten sulfide (WS2)@VS2 hybrid nano-architectures prepared via a facile one-step hydrothermal approach is reported. Hierarchical hybrids lead to rich exposed active edge sites, tuned porous nanopetals-decorated morphologies, and high intrinsic activity owing to the strong interfacial interaction between the two materials. Fabricated supercapacitors using MoS2@VS2 and WS2@VS2 electrodes exhibit high specific capacitances of 513 and 615 F g(-)(1), respectively, at an applied current of 2.5 A g(-)(1) by the three-electrode configuration. The asymmetric device fabricated using WS2@VS2 electrode exhibits a high specific capacitance of 222 F g(-)(1) at an applied current of 2.5 A g(-)(1) with the specific energy of 52 Wh kg(-)(1) at a specific power of 1 kW kg(-)(1). For HER, the WS2@VS2 catalyst shows noble characteristics with an overpotential of 56 mV to yield 10 mA cm(-)(2), a Tafel slope of 39 mV dec(-1), and an exchange current density of 1.73 mA cm(-)(2). In addition, density functional theory calculations are used to evaluate the durable heterostructure formation and adsorption of hydrogen atom on the various accessible sites of MoS2@VS2 and WS2@VS2 heterostructures.
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页数:19
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