A Cake-Style CoS2@MoS2/RGO Hybrid Catalyst for Efficient Hydrogen Evolution

被引：258
作者：
Guo, Yaxiao [1 ,2 ]
Gan, Linfeng [1 ]
Shang, Changshuai [1 ,2 ]
Wang, Erkang [1 ]
Wang, Jin [1 ,3 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] SUNY Stony Brook, Dept Chem & Phys, Stony Brook, NY 11794 USA
来源：
ADVANCED FUNCTIONAL MATERIALS | 2017年 / 27卷 / 05期
基金：
中国国家自然科学基金;
关键词：
ACTIVE EDGE SITES; CARBON NANOFIBERS; MOS2; GRAPHENE; NANOSHEETS; PERFORMANCE; COCATALYSTS; CHEMISTRY; GRAPHITE; LITHIUM;
D O I：
10.1002/adfm.201602699
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A three-tiered cake-style composite is elaborately established, with the characteristic of a double-deck of MoS2 nanosheets and reduction of graphene oxide (RGO) sheets dotted with CoS2 nanoparticles (CoS2@MoS2/RGO). Because of the prominent synergistic effect of graphene acting as conductive support, MoS2 and CoS2 providing abundant catalytically active sites, and the cake-style structure promoting mechanical stability, the CoS2@MoS2/RGO exhibits a superior hydrogen evolution reaction activity with a small overpotential of 98 mV at cathodic current density of 10 mA cm(-2), and a small Tafel slope of 37.4 mV dec(-1), as well as excellent cycling stability. Density functional theory calculations reveal that the hydrogen adsorption free energy of CoS2@MoS2/RGO is close to zero.
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页数：7
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