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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Fabrication of Three-Dimensional Multiscale Porous Alloy Foams at a Planar Substrate for Efficient Water Splitting
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Fabrication of Three-Dimensional Multiscale Porous Alloy Foams at a Planar Substrate for Efficient Water Splitting

机译：三维多尺度多孔合金泡沫在平面基材上的制造，以实现高效的水分裂

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摘要

The electrolysis of water to produce hydrogen and oxygen is a simple and attractive approach to store renewable energies in the form of chemical fuels, in which the key fact depends on the innovative exploration of high-performance electrocatalysts. Herein, we describe a novel electrochemical deposition method for synthesizing three-dimensional NiCo, NiCu, and CoCu alloy foams at a planar electrode substrate for the hydrogen evolution reaction (HER) and NiFe alloy foam for the oxygen evolution reaction (OER). The electrodes are composed of multiscale porous structure caused by concomitant hydrogen gas bubbles evolved during cathodic deposition. The unique electrode structure is beneficial for exposing more catalytic active sites, enhancing mass transport, and accelerating dissipation of gas bubbles generated during water electrolysis. The two electrode alkaline water electrolyzers constructed with these alloy foams can afford a current density of 400 mA cm(-2) at a cell voltage of 1.73 V for Ni30Fe parallel to NiCo and at 1.71 V for Ni30Fe parallel to NiCu and exhibit excellent durability in prolonged bulk electrolysis. The strategy developed in this study highlights construction of three-dimensional, multiscale porous electrocatalysts at a planar electrode substrate which is significant for catalysis application.
机译：生产氢气和氧气的水是一种简单而有吸引力的方法，可以以化学燃料的形式存储可再生能量，其中关键事实取决于高性能电催化剂的创新探索。在此，我们描述了一种新的电化学沉积方法，用于在平面电极基板上合成三维Nico，NiCU和Cocu合金泡沫，用于氢进化反应（她）和NiFe合金泡沫的氧化反应（Oer）。电极由通过在阴极沉积期间演化的伴随氢气气泡引起的多尺度多孔结构组成。独特的电极结构有利于暴露更多的催化活性位点，增强质量传输，加速在水电解期间产生的气泡耗散。由这些合金泡沫构成的两个电极碱性水电解器可以在与Nico平行的Ni30Fe和1.71V平行于Nicu的Ni30Fe的1.71V的电池电压下电流密度为1.73V，并且表现出优异的耐久性长时间散装电解。本研究开发的策略突出了在平面电极基板上的三维多尺度多孔电催化剂的构建，这对于催化施用很大。

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  • 作者

    Teng Xue; Wang Jianying; Ji Lvlv; Liu Yangyang; Zhang Cheng; Chen Zuofeng;

  • 作者单位

    Tongji Univ Shanghai Key Lab Chem Assessment &

    Sustainabil Sch Chem Sci &

    Engn 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Shanghai Key Lab Chem Assessment &

    Sustainabil Sch Chem Sci &

    Engn 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Shanghai Key Lab Chem Assessment &

    Sustainabil Sch Chem Sci &

    Engn 1239 Siping Rd Shanghai 200092 Peoples R China;

    Tongji Univ Shanghai Key Lab Chem Assessment &

    Sustainabil Sch Chem Sci &

    Engn 1239 Siping Rd Shanghai 200092 Peoples R China;

    Zhejiang Univ Technol Coll Chem Engn &

    Mat Sci 18 Chaowang Rd Hangzhou 310014 Zhejiang Peoples R China;

    Tongji Univ Shanghai Key Lab Chem Assessment &

    Sustainabil Sch Chem Sci &

    Engn 1239 Siping Rd Shanghai 200092 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

    Water splitting; Hierarchical structure; Porous foam; Bimetallic alloy; Cathodic deposition;

    机译：水分裂;等级结构;多孔泡沫;双金属合金;阴极沉积;

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