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首页> 外文期刊>Advanced energy materials >Ni Strongly Coupled with Mo_2C Encapsulated in Nitrogen-Doped Carbon Nanofibers as Robust Bifunctional Catalyst for Overall Water Splitting
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Ni Strongly Coupled with Mo_2C Encapsulated in Nitrogen-Doped Carbon Nanofibers as Robust Bifunctional Catalyst for Overall Water Splitting

机译：Ni与掺入碳掺杂纳米碳纤维中的Mo_2C牢固偶联，是用于整体水分解的稳健双功能催化剂

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摘要

It is urgently required to develop highly efficient and stable bifunctional non-noble metal electrocatalysts for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for water splitting. In this study, a facile electrospinning followed by a post-carbonization treatment to synthesize nitrogen-doped carbon nanofibers (NCNFs) integrated with Ni and Mo2C nanoparticles (Ni/Mo2C-NCNFs) as water splitting electrocatalysts is developed. Owing to the strong hydrogen binding energy on Mo2C and high electrical conductivity of Ni, synergetic effect between Ni and Mo2C nanoparticles significantly promote both HER and OER activities. The optimized hybrid (Ni/Mo2C(1:2)-NCNFs) delivers low overpotentials of 143 mV for HER and 288 mV for OER at a current density of 10 mA cm(-2). An alkaline electrolyzer with Ni/Mo2C(1:2)-NCNFs as catalysts for both anode and cathode exhibits a current density of 10 mA cm(-2) at a voltage of 1.64 V, which is only 0.07 V larger than the benchmark of Pt/C-RuO2 electrodes. In addition, an outstanding long-term durability during 100 h testing without obvious degradation is achieved, which is superior to most of the noble-metal-free electrocatalysts reported to date. This work provides a simple and effective approach for the preparation of low-cost and high-performance bifunctional electrocatalysts for efficient overall water splitting.
机译：迫切需要开发用于氢分解反应（HER）和氧分解反应（OER）的高效，稳定的双功能非贵金属电催化剂，用于水分解。在这项研究中，开发了一种简便的静电纺丝技术，然后进行后碳化处理，以合成掺有Ni和Mo2C纳米粒子（Ni / Mo2C-NCNFs）的掺氮碳纳米纤维（NCNFs）作为水分解电催化剂。由于Mo2C具有很强的氢键能和Ni的高电导率，Ni和Mo2C纳米颗粒之间的协同作用显着促进了HER和OER活性。经过优化的混合电路（Ni / Mo2C（1：2）-NCNFs）在10 mA cm（-2）的电流密度下可提供143 mV的低过电势（HER）和288 mV的低过电势（OER）。使用Ni / Mo2C（1：2）-NCNFs作为阳极和阴极催化剂的碱性电解槽在1.64 V电压下的电流密度为10 mA cm（-2），仅比基准电压下的0.07 V大Pt / C-RuO2电极。此外，在100小时的测试过程中获得了出色的长期耐久性，而没有明显的降解，这要优于迄今为止报道的大多数无贵金属电催化剂。这项工作为制备低成本和高性能的双功能电催化剂提供了一种简单有效的方法，以实现有效的总水分解。

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  • 来源
    《Advanced energy materials》 |2019年第10期|1803185.1 -1803185.11|共11页
  • 作者

    Li Meixuan; Zhu Yun; Wang Huiyuan; Wang Ce; Pinna Nicola; Lu Xiaofeng;

  • 作者单位

    Jilin Univ, Coll Chem, Alan G MacDiarmid Inst, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Coll Chem, Alan G MacDiarmid Inst, Changchun 130012, Jilin, Peoples R China;

    Jilin Univ, Key Lab Automobile Mat, Minist Educ, Nanling Campus,5988 Renmin St, Changchun 130025, Jilin, Peoples R China|Jilin Univ, Sch Mat Sci & Engn, Nanling Campus,5988 Renmin St, Changchun 130025, Jilin, Peoples R China|Jilin Univ, Int Ctr Future Sci, Changchun 130025, Jilin, Peoples R China;

    Jilin Univ, Coll Chem, Alan G MacDiarmid Inst, Changchun 130012, Jilin, Peoples R China;

    Humboldt Univ, Inst Chem, Brook Taylor Str 2, D-12489 Berlin, Germany|Humboldt Univ, IRIS Adlershof, Brook Taylor Str 2, D-12489 Berlin, Germany;

    Jilin Univ, Coll Chem, Alan G MacDiarmid Inst, Changchun 130012, Jilin, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    bifunctional electrocatalysts; electrospinning; Mo2C; Ni; overall water splitting;

    机译：双功能电催化剂;静电纺丝;Mo2C;Ni;总水分解;

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