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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >In situ surface engineering of nickel inverse opal for enhanced overall electrocatalytic water splitting
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In situ surface engineering of nickel inverse opal for enhanced overall electrocatalytic water splitting

机译：镍逆蛋白石原位表面工程，用于增强整体电催化水分裂

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摘要

High-efficiency non-precious catalysts are important for hydrogen and oxygen evolution reactions (HER and OER). Practical water splitting needs not only intrinsically active catalyst materials but also the maximization of their electrocatalytic capability in a real electrolyzer. Here, we report for the first time a Ni/Ni2P inverse opal architecture fabricated by surface engineering. The superior HER properties are enabled by maximum active crystallographic plane exposure and vertical alignment of Ni2P nanosheets on nickel inverse opal. It requires an overpotential of only 73 mV to drive a HER current density of -20 mA cm(-2). After doping with Fe, the resulting Fe: Ni/Ni2P inverse electrode shows excellent OER performance with a very low overpotential (285 mV) at a current density of 20 mA cm(-2). An alkaline electrolyzer using the two 3D structured electrodes could split water at 20 mA cm(-2) with a low voltage of similar to 1.52 V for 100 h. The catalytic activity is even superior to that of the noble metal catalyst couple (IrO2-Pt/C). This work provides a surface engineered opal structure to maximize the electrocatalyst properties in the systems with coupled electron transfer and mass transport.
机译：高效非珍贵催化剂对于氢气和氧气进化反应（她和oer）很重要。实用的水分裂不仅需要本质上活性催化剂材料，还需要在真正的电解槽中最大化其电催化能力。在这里，我们首次报告了由地面工程制造的NI / NI2P逆蛋白石架构。通过最大主动晶面暴露和Ni2P纳米片上的Ni2P纳米片垂直对准，使其具有优异的性质。它需要仅73 mV的过电位，以驱动其电流密度-20mA cm（-2）。掺杂用Fe后，所得Fe：Ni / Ni2P逆电极显示出优异的OER性能，其电流密度为20 mA cm（-2）。使用两个3D结构电极的碱性电解器可以以20 mA cm（-2）的低电压将水分为20mA cm（-2），与1.52V相似100小时。催化活性甚至优于贵金属催化剂耦合（IRO2-PT / C）的催化活性。这项工作提供了表面工程的蛋白石结构，以最大化具有耦合电子转移和质量传输的系统中的电催化剂性能。

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    Zhou Qingwen; Pu Jun; Sun Xiaolei; Zhu Chao; Li Jiachen; Wang Jian; Chang Shaozhong; Zhang Huigang;

  • 作者单位

    Nanjing Univ Natl Lab Solid State Microstruct Coll Engn &

    Appl Sci Inst Mat Engn Collaborat Innovat Ctr Adv Microstr Nanjing Jiangsu Peoples R China;

    Nanjing Univ Natl Lab Solid State Microstruct Coll Engn &

    Appl Sci Inst Mat Engn Collaborat Innovat Ctr Adv Microstr Nanjing Jiangsu Peoples R China;

    Leibniz Inst Solid State &

    Mat Res IFW Dresden Helmholtzstr 20 D-01069 Dresden Germany;

    Nanjing Univ Natl Lab Solid State Microstruct Coll Engn &

    Appl Sci Inst Mat Engn Collaborat Innovat Ctr Adv Microstr Nanjing Jiangsu Peoples R China;

    Northwest Univ Dept Chem Engn Xian 710069 Peoples R China;

    Nanjing Univ Natl Lab Solid State Microstruct Coll Engn &

    Appl Sci Inst Mat Engn Collaborat Innovat Ctr Adv Microstr Nanjing Jiangsu Peoples R China;

    Nanjing Univ Natl Lab Solid State Microstruct Coll Engn &

    Appl Sci Inst Mat Engn Collaborat Innovat Ctr Adv Microstr Nanjing Jiangsu Peoples R China;

    Nanjing Univ Natl Lab Solid State Microstruct Coll Engn &

    Appl Sci Inst Mat Engn Collaborat Innovat Ctr Adv Microstr Nanjing Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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