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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Hierarchical Edge-Rich Nickel Phosphide Nanosheet Arrays as Efficient Electrocatalysts toward Hydrogen Evolution in Both Alkaline and Acidic Conditions
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Hierarchical Edge-Rich Nickel Phosphide Nanosheet Arrays as Efficient Electrocatalysts toward Hydrogen Evolution in Both Alkaline and Acidic Conditions

机译：富含层次的边缘镍磷化纳米片阵列作为碱性和酸性条件的高效电催化剂朝向氢进化

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摘要

Searching highly active, high stability, low-cost electrocatalysts toward the hydrogen evolution reaction (HER) is imperative for electrochemical hydrogen production. We propose an effective synthetic method to obtain self supported, hierarchical, and edge-rich nickel phosphide nanosheet arrays on nickel foam (Ni2P NSs-NF), which are successfully employed as a high-efficiency, three-dimensional (3D) binder-free electrode for the HER. Benefiting from the 3D open nanostructure with abundant edges in the Ni2P NSs, the Ni2P NSs-NF electrode exhibits superior activity for the HER both in alkaline and acidic conditions. It requires low overpotentials of 89 mV in the alkaline solution (1 M KOH) and 67 mV in the acidic solution (0.5 M H2SO4) to drive 10 mA cm(-2) with low Tafel slopes of 82 and 57 mV dec(-1), respectively. Besides, the hierarchical Ni2P NSs-NF electrode shows no apparent performance decay toward the HER even after 10,000 cycles. Theoretical calculation results prove that the free energy of hydrogen adsorption on the (211) crystal facet of Ni2P is closest to zero (-0.03 eV), which is supposed to be the most active site toward the HER The freestanding edge-rich Ni2P NSs-NF electrode is prospective for large-scale preparation of hydrogen.
机译：寻找高度活跃，高稳定性，低成本电催化剂朝向氢气进化反应（她）是电化学氢生产的迫在因素。我们提出了一种有效的合成方法，以获得镍泡沫（Ni2P NSS-NF）上的自支撑，分层和边缘富镍磷化纳芯阵列，其成功地用作高效率，三维（3D）无粘合剂她的电极。从NI2P NSS中具有丰富的边缘的3D开口纳米结构受益，Ni2P NSS-NF电极在碱性和酸性条件下表现出优异的活性。它需要在碱性溶液（1M KOH）和67mV中为89mV在酸性溶液（0.5μmH2SO4）中的低过电位，以驱动10 mA cm（-2），低Tafel斜率为82和57 mV DEC（-1 ）， 分别。此外，即使在10,000个循环之后，等级Ni2P NSS-NF电极也显示出朝向她的明显性能衰减。理论计算结果证明，Ni2p（211）晶谱上的氢吸附的自由能最接近零（-0.03eV），这应该是朝着她的独立边缘的Ni2P NSS的最活跃的部位 - NF电极是大规模制备氢的前景。

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  • 作者

    Yan Qing; Chen Xi; Wei Tong; Wang Guiling; Zhu Min; Zhuo Yikuan; Cheng Kui; Ye Ke; Zhu Kai; Yan Jun; Cao Dianxue; Li Yiju;

  • 作者单位

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Xidian Univ Dept Appl Phys Sch Phys &

    Optoelect Engn Xian 710071 Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

    Harbin Engn Univ Key Lab Superlight Mat &

    Surface Technol Minist Educ Coll Mat Sci &

    Chem Engn Harbin 150001 Heilongjiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Freestanding; Edge-rich; Ni2P nanosheets; Acid and alkaline solutions; Hydrogen evolution reaction;

    机译：独立式;边缘富含;Ni2P纳米液;酸和碱性溶液;氢进化反应;

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