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Interface engineered NiMoN/Ni_3N heterostructures for enhanced alkaline hydrogen evolution reaction

机译：接口工程尼森/ Ni_3N异质结构，用于增强碱性氢气进化反应

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摘要

The development of low-cost and high-efficiency hydrogen evolution reaction (HER) catalysts for alkaline electrolysis is beneficial in the storage of renewable electricity through hydrogen energy. Metallic Ni3N is regarded as an excellent catalyst for water oxidation, but the HER activity in alkaline solution is subjected to its poor water dissociation ability and strong hydrogen adsorption. In this work, we report a highly active and durable alkaline HER electrocatalyst of NiMoN/Ni3N heterostructures by interface engineering. The introduction of NiMoN can not only effectively accelerate the water dissociation process, but also optimize the binding energy of hydrogen via interfacial interaction with Ni3N. In addition, the porous nanosheet arrays assembled by plenty of nanoparticles can provide more exposed active sites and accelerate the reaction kinetics. The heterostructured electrocatalyst exhibits an extremely low overpotential of 28 mV at a current density of 10 mA cm(-2) and a small Tafel slope of 49 mV dec(-1). The design concept of interface engineering could offer a new paradigm for the development of superior HER catalysts toward alkaline electrolysis.
机译：用于碱性电解的低成本和高效氢进化反应（HER）催化剂的发展是有益于通过氢能量的可再生电力的储存。金属Ni3N被认为是用于水氧化的优异催化剂，但是碱性溶液中的活性较低的水解离子能力和强氢吸附。在这项工作中，我们通过界面工程报告了一种高活性和耐用的碱性尼莫/ Ni3N异质结构的电催化剂。纳莫的引入不仅可以有效地加速水解处理，而且还通过与Ni3N的界面相互作用优化氢的结合能量。此外，由大量纳米颗粒组装的多孔纳米片阵列可以提供更暴露的活性位点并加速反应动力学。异质结构电催化剂在10mA cm（-2）的电流密度下具有极低的28mV的过电位，小Tafel斜率为49mV（-1）。界面工程的设计理念可以为碱性电解的优质催化剂的开发提供新的范式。

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  • 来源
    《Applied Surface Science》 |2021年第2期|148407.1-148407.6|共6页
  • 作者

    Hua Wei; Sun Huanhuan; Liu Huanyan; Li Yueying; Wang Jian-Gan;

  • 作者单位

    Northwestern Polytech Univ & Shaanxi Joint Lab Gr Sch Mat Sci & Engn Ctr Nano Energy Mat State Key Lab Solidificat Proc Xian 710072 Peoples R China;

    Northwestern Polytech Univ & Shaanxi Joint Lab Gr Sch Mat Sci & Engn Ctr Nano Energy Mat State Key Lab Solidificat Proc Xian 710072 Peoples R China;

    Northwestern Polytech Univ & Shaanxi Joint Lab Gr Sch Mat Sci & Engn Ctr Nano Energy Mat State Key Lab Solidificat Proc Xian 710072 Peoples R China;

    Qinghai Univ New Energy Photovolta Ind Res Ctr Xining 810016 Peoples R China;

    Northwestern Polytech Univ & Shaanxi Joint Lab Gr Sch Mat Sci & Engn Ctr Nano Energy Mat State Key Lab Solidificat Proc Xian 710072 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Alkaline hydrogen evolution reaction; NiMoN/Ni3N heterostructures; Interface engineering; Water splitting;

    机译：碱性氢气进化反应;尼森/ Ni3N异质结构;界面工程;水分裂;

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