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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牢固地偶联与氮掺杂碳纳米纤维中的Mo_2C相结合，作为整个水分裂的鲁棒双官能催化剂

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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：迫切需要为氢进化反应（她）和氧气进化反应（oer）开发高效稳定的双官能非贵金属电催化剂用于水分裂。在该研究中，开发了一种容易静电纺丝，其次是碳化处理，以合成与Ni和Mo2C纳米颗粒（Ni / Mo2C-NCNF）一体化的氮掺杂碳纳米纤维（NCNF）作为水分裂电催化剂。由于对MO2C的强氢结合能和Ni的高导电性，Ni和Mo2C纳米粒子之间的协同作用显着促进了她和OER活动。优化的混合动力车（NI / MO2C（1：2）-NCNFS）为她的电流密度为10 mA cm（-2），为她的143 mV提供143 mV的低调。具有Ni / Mo2C（1：2）-NCNF的碱性电解器作为阳极和阴极的催化剂，在1.64V的电压下显示电流密度为10 mA cm（-2），其仅比基准更大为0.07V Pt / c-ruo2电极。此外，实现了在100小时测试期间的出色长期耐久性，无明显降解，其优于迄今为止报告的大多数无贵巴金属电催化剂。这项工作提供了一种简单有效的方法，用于制备低成本和高性能双功能电催化剂，以实现高效的整体水分裂。

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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;整体水分裂;

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