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首页> 外文期刊>Advanced Functional Materials >Nanoporous Nitrogen-Doped Graphene Oxide/Nickel Sulfide Composite Sheets Derived from a Metal-Organic Framework as an Efficient Electrocatalyst for Hydrogen and Oxygen Evolution
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Nanoporous Nitrogen-Doped Graphene Oxide/Nickel Sulfide Composite Sheets Derived from a Metal-Organic Framework as an Efficient Electrocatalyst for Hydrogen and Oxygen Evolution

机译：源自金属有机骨架的纳米多孔氮掺杂氧化石墨烯/硫化镍复合片材，作为氢和氧释放的高效电催化剂

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摘要

Engineering of controlled hybrid nanocomposites creates one of the most exciting applications in the fields of energy materials and environmental science. The rational design and in situ synthesis of hierarchical porous nanocomposite sheets of nitrogen-doped graphene oxide (NGO) and nickel sulfide (Ni7S6) derived from a hybrid of a well-known nickel-based metal-organic framework (NiMOF-74) using thiourea as a sulfur source are reported here. The nanoporous NGO/MOF composite is prepared through a solvothermal process in which Ni(II) metal centers of the MOF structure are chelated with nitrogen and oxygen functional groups of NGO. NGO/Ni7S6 exhibits bifunctional activity, capable of catalyzing both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) with excellent stability in alkaline electrolytes, due to its high surface area, high pore volume, and tailored reaction interface enabling the availability of active nickel sites, mass transport, and gas release. Depending on the nitrogen doping level, the properties of graphene oxide can be tuned toward, e.g., enhanced stability of the composite compared to commonly used RuO2 under OER conditions. Hence, this work opens the door for the development of effective OER/HER electrocatalysts based on hierarchical porous graphene oxide composites with metal chalcogenides, which may replace expensive commercial catalysts such as RuO2 and IrO2.
机译：受控杂化纳米复合材料的工程设计在能源材料和环境科学领域创造了最令人兴奋的应用之一。使用硫脲从已知的镍基金属-有机骨架（NiMOF-74）的混合物衍生出的氮掺杂氧化石墨烯（NGO）和硫化镍（Ni7S6）的分层多孔纳米复合片的合理设计和原位合成作为硫源的报道在这里。纳米多孔NGO / MOF复合材料通过溶剂热法制备，其中MOF结构的Ni（II）金属中心与NGO的氮和氧官能团螯合。 NGO / Ni7S6具有双功能活性，由于其高表面积，高孔体积和量身定制的反应界面，因此能够在碱性电解液中以优异的稳定性催化氢气分解反应（HER）和氧气分解反应（OER）。活性镍位点的可用性，大量运输和气体释放。取决于氮掺杂水平，可以将氧化石墨烯的性能调整为例如与在OER条件下常用的RuO 2相比增强的复合物的稳定性。因此，这项工作为开发基于具有金属硫属元素化物的分层多孔氧化石墨烯复合材料的有效OER / HER电催化剂打开了大门，这可以取代昂贵的商业催化剂，如RuO2和IrO2。

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  • 来源
    《Advanced Functional Materials》 |2017年第33期|1700451.1-1700451.10|共10页
  • 作者

    Jayaramulu Kolleboyina; Masa Justus; Tomanec Ondrej; Peeters Daniel; Ranc Vaclav; Schneemann Andreas; Zboril Radek; Schuhmann Wolfgang; Fischer Roland A.;

  • 作者单位

    Ruhr Univ Bochum, Inorgan Chem 2, D-44801 Bochum, Germany|Tech Univ Munich, Dept Chem, Chair Inorgan & Metal Organ Chem, D-85748 Garching, Germany|Tech Univ Munich, Catalysis Res Ctr, D-85748 Garching, Germany|Palacky Univ, Fac Sci, Reg Ctr Adv Technol & Mat, Slechtitelu 27, Olomouc 78371, Czech Republic;

    Palacky Univ, Fac Sci, Reg Ctr Adv Technol & Mat, Slechtitelu 27, Olomouc 78371, Czech Republic;

    Ruhr Univ Bochum, Inorgan Chem 2, D-44801 Bochum, Germany;

    Palacky Univ, Fac Sci, Reg Ctr Adv Technol & Mat, Slechtitelu 27, Olomouc 78371, Czech Republic;

    Ruhr Univ Bochum, Inorgan Chem 2, D-44801 Bochum, Germany|Tech Univ Munich, Dept Chem, Chair Inorgan & Metal Organ Chem, D-85748 Garching, Germany|Tech Univ Munich, Catalysis Res Ctr, D-85748 Garching, Germany;

    Palacky Univ, Fac Sci, Reg Ctr Adv Technol & Mat, Slechtitelu 27, Olomouc 78371, Czech Republic;

    Ruhr Univ Bochum, Fac Chem & Biochem, CES, Analyt Chem, D-44780 Bochum, Germany;

    Tech Univ Munich, Dept Chem, Chair Inorgan & Metal Organ Chem, D-85748 Garching, Germany|Tech Univ Munich, Catalysis Res Ctr, D-85748 Garching, Germany;

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  • 关键词

    electrocatalysis; metal-organic framework (MOF); nanosheets; nickel sulfide; nitrogen-doped graphene oxide;

    机译：电催化;金属有机骨架;纳米片;硫化镍;掺氮氧化石墨烯;

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