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

机译：一种蛋糕式CoS2 @ MoS2 / RGO杂化催化剂，可有效释放氢气

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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.
机译：精心建立了三层蛋糕式复合材料，其特征是双层MoS2纳米片和还原点缀有CoS2纳米粒子（CoS2 @ MoS2 / RGO）的氧化石墨烯（RGO）片的特征。由于石墨烯作为导电载体具有显着的协同作用，MoS2和CoS2提供了丰富的催化活性位点，并且饼状结构促进了机械稳定性，因此CoS2 @ MoS2 / RGO表现出优异的氢释放反应活性，且过电位小。阴极电流密度为10 mA cm（-2）时为98 mV，Tafel斜率为37.4 mV dec（-1）小，并且具有出色的循环稳定性。密度泛函理论计算表明，CoS2 @ MoS2 / RGO的氢吸附自由能接近于零。

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  • 来源
    《Advanced Functional Materials》 |2017年第5期|1602699.1-1602699.9|共9页
  • 作者

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

  • 作者单位

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China|SUNY Stony Brook, Dept Chem & Phys, Stony Brook, NY 11794 USA;

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