A Cake‐Style CoS 2 @MoS 2 /RGO Hybrid Catalyst for Efficient Hydrogen Evolution | Zendy

Guo Yaxiao | Zendy; Gan Linfeng | Zendy; Shang Changshuai | Zendy; Wang Erkang | Zendy; Wang Jin | Zendy

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A Cake‐Style CoS 2 @MoS 2 /RGO Hybrid Catalyst for Efficient Hydrogen Evolution

Author(s) -

Guo Yaxiao,

Gan Linfeng,

Shang Changshuai,

Wang Erkang,

Wang Jin

Publication year - 2017

Publication title -

advanced functional materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 6.069

H-Index - 322

eISSN - 1616-3028

pISSN - 1616-301X

DOI - 10.1002/adfm.201602699

Subject(s) - tafel equation , graphene , materials science , overpotential , catalysis , oxide , hydrogen , chemical engineering , adsorption , nanotechnology , nanoparticle , inorganic chemistry , electrochemistry , chemistry , electrode , organic chemistry , metallurgy , engineering

A three‐tiered cake‐style composite is elaborately established, with the characteristic of a double‐deck of MoS 2 nanosheets and reduction of graphene oxide (RGO) sheets dotted with CoS 2 nanoparticles (CoS 2 @MoS 2 /RGO). Because of the prominent synergistic effect of graphene acting as conductive support, MoS 2 and CoS 2 providing abundant catalytically active sites, and the cake‐style structure promoting mechanical stability, the CoS 2 @MoS 2 /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 CoS 2 @MoS 2 /RGO is close to zero.

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