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首页> 外文期刊>New Journal of Chemistry >Mussel-inspired facile synthesis of Fe/Co-polydopamine complex nanospheres: complexation mechanism and application of the carbonized hybrid nanospheres as an efficient bifunctional electrocatalyst
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Mussel-inspired facile synthesis of Fe/Co-polydopamine complex nanospheres: complexation mechanism and application of the carbonized hybrid nanospheres as an efficient bifunctional electrocatalyst

机译：Fe / Co-Polydopamine复合物纳米球的贻贝灵感化合成：碳化杂交纳米球的络合机理及施加作为高效双官能电催化剂

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摘要

Carbon nanostructures containing binary transition metal compounds have shown great potential for applications such as electrocatalysis. In this article, we report a one-pot synthesis of Co(II)-Fe(III)-polydopamine (PDA) complex nanospheres as a facile approach to binary metal-doped carbon nanostructures. The complex nanospheres were prepared simply by polymerization of dopamine (DOPA) in a basic aqueous solution containing both types of transition metal ion. Results show that cobalt(II) ions do not form complexes with DOPA, whereas can form coordination bonds with PDA oligomers after the initiation of polymerization, leading to irregular shaped complex particles. When both cobalt(II) and Fe(III) ions are present in the polymerization system, Fe(III) ions, which are able to form complexes with DOPA before the initiation of polymerization, play a dominant role in determining the morphology of the complex nanostructure, leading to hybrid complex nanospheres. Furthermore, the Co(II)-Fe(III)-PDA complex nanospheres can be easily converted to mesoporous N-doped carbon nanospheres with embedded CoFe2O4/CoFe nanoparticles. Electrochemical studies suggest that these nanospheres exhibit enhanced bifunctional electrocatalytic performance over commercial Pt/C towards ORR and OER. They also show good stability with steady cycling performance for over 300 cycles when used as a bifunctional oxygen electrocatalyst in a rechargeable zinc-air battery cell.
机译：含有二元过渡金属化合物的碳纳米结构显示出诸如电殖分析的应用的巨大潜力。在本文中，我们向二元金属掺杂碳纳米结构的容纳方法报告了Co（II）-Fe（III）-Fe（III） - 氟二胺（PDA）复合纳米球的单盆合成。通过在含有两种过渡金属离子的碱性水溶液中的多巴胺（DOPA）聚合来制备复合纳米球。结果表明，钴（II）离子不与DOPA形成复合物，而可以在聚合开始后与PDA低聚物与PDA低聚物形成配合键，导致不规则形状的复合颗粒。当聚合体系中存在钴（II）和Fe（III）离子时，能够在聚合开始前与DOPA形成复合物的Fe（III）离子，在确定复合物的形态方面发挥显着作用纳米结构，导致杂交复合纳米球。此外，CO（II）-Fe（III）-Fe（III）-PDA复合纳米球可以容易地转化为具有嵌入式COFE2O4 / COFE纳米粒子的中孔N掺杂的碳纳米球。电化学研究表明，这些纳米主体在商业PT / C朝向ORR和OER上表现出增强的双官能电催化性能。当用作可充电锌 - 空气电池单元中的双官能氧电池时，它们还具有超过300个循环的稳定循环性能良好的稳定性。

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  • 来源
    《New Journal of Chemistry》 |2018年第24期|共11页
  • 作者

    Ang Jia Ming; Li Bing; Xi Shibo; Du Yonghua; Zhao Chenyang; Kong Junhua; Zong Yun; Stubbs Paul Ludger; Lu Xuehong;

  • 作者单位

    Nanyang Technol Univ Sch Mat Sci &

    Engn 50 Nanyang Ave Singapore 639798 Singapore;

    ASTAR Inst Mat Res &

    Engn 2 Fusionopolis Way Singapore 138634 Singapore;

    ASTAR Inst Chem &

    Engn Sci 1 Pesek Rd Singapore 627833 Singapore;

    ASTAR Inst Chem &

    Engn Sci 1 Pesek Rd Singapore 627833 Singapore;

    Nanyang Technol Univ Sch Mat Sci &

    Engn 50 Nanyang Ave Singapore 639798 Singapore;

    ASTAR Inst Mat Res &

    Engn 2 Fusionopolis Way Singapore 138634 Singapore;

    ASTAR Inst Mat Res &

    Engn 2 Fusionopolis Way Singapore 138634 Singapore;

    ASTAR Inst Chem &

    Engn Sci 1 Pesek Rd Singapore 627833 Singapore;

    Nanyang Technol Univ Sch Mat Sci &

    Engn 50 Nanyang Ave Singapore 639798 Singapore;

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  • 中图分类 化学;
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