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首页> 外文期刊>Advanced energy materials >Ultrasensitive Iron-Triggered Nanosized Fe-CoOOH Integrated with Graphene for Highly Efficient Oxygen Evolution
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Ultrasensitive Iron-Triggered Nanosized Fe-CoOOH Integrated with Graphene for Highly Efficient Oxygen Evolution

机译：超灵敏的铁引发的纳米级Fe-CoOOH与石墨烯集成，可高效释放氧气

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摘要

Effectively active oxygen evolution reaction (OER) electrocatalysts are highly desired for water splitting. Herein, the design and fabrication of nanometer-sized Fe-modulated CoOOH nanoparticles by a novel conversion tailoring strategy is reported for the first time and these nanoparticles are assembled on graphene matrix to construct 2D nanohybrids (Fe-CoOOH/G) with ultrasmall particles and finely modulated local electronic structure of Co cations. The Fe components are capable of tailoring and converting the micrometer-sized sheets into nanometer-sized particles, indicative of ultrasensitive Fe-triggered behavior. The as-made Fe-CoOOH/G features highly exposed edge active sites, well-defined porous structure, and finely modulated electron structure, together with effectively interconnected conducting networks endowed by graphene. Density functional theory calculations have revealed that the Fe dopants in the Fe. CoOOH nanoparticles have an enhanced adsorption capability toward the oxygenated intermediates involved in OER process, thus facilitating the whole catalytic reactions. Benefiting from these integrated characteristics, the as-made Fe-CoOOH/G nanohybrids as an oxygen evolution electrocatalyst can deliver a low overpotential of 330 mV at 10 mA cm(-2) and excellent electrochemical durability in alkaline medium. This strategy provides an effective, durable, and nonprecious-metal electrocatalyst for water splitting.
机译：有效的活性氧释放反应（OER）电催化剂非常需要用于水分解。在本文中，首次报道了通过新颖的转化定制策略设计和制造纳米级Fe调节的CoOOH纳米颗粒，并将这些纳米颗粒组装在石墨烯基体上以构建具有超小颗粒的二维纳米杂化物（Fe-CoOOH / G）。精细调制的Co阳离子的局部电子结构。 Fe组分能够将微米级的片材剪裁并转化为纳米级的颗粒，这表明超灵敏的Fe触发行为。制成的Fe-CoOOH / G具有高度暴露的边缘活性位，清晰的多孔结构和精细调制的电子结构，以及石墨烯所赋予的有效互连的导电网络。密度泛函理论计算已经揭示出Fe中的Fe掺杂剂。 CoOOH纳米颗粒对OER过程中涉及的含氧中间体具有增强的吸附能力，从而促进了整个催化反应。得益于这些综合特性，制成的Fe-CoOOH / G纳米杂化物作为一种析氧电催化剂可以在10 mA cm（-2）时提供330 mV的低过电势，并在碱性介质中具有出色的电化学耐久性。该策略为水分解提供了有效，耐用且非贵金属的电催化剂。

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  • 来源
    《Advanced energy materials》 |2017年第14期|1602148.1-1602148.9|共9页
  • 作者

    Han Xiaotong; Yu Chang; Zhou Si; Zhao Changtai; Huang Huawei; Yang Juan; Liu Zhibin; Zhao Jijun; Qiu Jieshan;

  • 作者单位

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Minist Educ, Key Lab Mat Modificat Laser Ion & Electron Beams, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem,Sch Chem Engn, Dalian 116024, Peoples R China;

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