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首页> 外文期刊>Advanced energy materials >Vertical CoP Nanoarray Wrapped by N,P-Doped Carbon for Hydrogen Evolution Reaction in Both Acidic and Alkaline Conditions
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Vertical CoP Nanoarray Wrapped by N,P-Doped Carbon for Hydrogen Evolution Reaction in Both Acidic and Alkaline Conditions

机译：N，P掺杂碳包裹的垂直CoP纳米阵列在酸性和碱性条件下的氢分解反应

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摘要

Hydrogen evolution reaction (HER) is a key reaction in water splitting, and developing efficient and robust non-noble electrocatalysts for HER is still a great challenge for large-scale hydrogen production. Herein, a vertically aligned core-shell structure grown on Ti foil with CoP nanoarray as a core and N,P-doped carbon (NPC) as a shell (CoP/NPC/TF) is first reported as an efficient electrocatalyst for HER. Results indicate that CoP/NPC/TF only demands the overpotentials of 91 and 80 mV to drive the current density of 10 mA cm(-2) in acidic and alkaline solutions. The electrochemical measurements and theoretical calculations show that the synergy of CoP nanorod core and porous NPC shell enhances HER performance significantly, because the introduction of porous NPC shell not only offers more active sites but also improves the electrical conductivity and durability of the sample in acidic and alkaline solutions. Density functional theory calculation further reveals that all the C atoms between N and P atoms in CoP/NPC are the most efficient active sites, which greatly improve the HER performance. The identification of active species in this work provides an effective strategy to design and synthesize the low-cost, high-efficient, and robust CoP-based electrocatalysts.
机译：氢气析出反应（HER）是水分解过程中的关键反应，开发用于HER的高效耐用的非贵族电催化剂仍然是大规模制氢的巨大挑战。在此，首先报道了在以CoP纳米阵列为核并且N，P掺杂碳（NPC）作为壳（CoP / NPC / TF）的Ti箔上生长的垂直取向的核-壳结构作为HER的有效电催化剂。结果表明，CoP / NPC / TF仅需要91和80 mV的超电势即可在酸性和碱性溶液中驱动10 mA cm（-2）的电流密度。电化学测量和理论计算表明，CoP纳米棒核和多孔NPC壳的协同作用显着增强了HER性能，因为引入多孔NPC壳不仅提供了更多的活性位点，而且还提高了样品在酸性和酸性条件下的电导率和耐久性。碱性溶液。密度泛函理论计算进一步揭示了CoP / NPC中N原子和P原子之间的所有C原子都是最有效的活性位点，大大提高了HER性能。这项工作中的活性物种的鉴定为设计和合成低成本，高效且坚固的CoP基电催化剂提供了有效的策略。

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  • 来源
    《Advanced energy materials》 |2019年第22期|1803970.1-1803970.10|共10页
  • 作者

    Huang Xingkai; Xu Xiaopei; Li Chao; Wu Dengfeng; Cheng Daojian; Cao Dapeng;

  • 作者单位

    Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China|Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China|Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China|Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China|Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China|Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China|Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CoP nanoarray; core-shell structure; hydrogen evolution reaction; N; P-doped carbon; zeolitic imidazolate framework-67;

    机译：警察纳米阵列;核心壳结构;氢进化反应;n;p掺杂碳;沸石咪唑酯框架-67;

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