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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Hierarchical CoS/MoS2 and Co3S4/MoS2/Ni2P nanotubes for efficient electrocatalytic hydrogen evolution in alkaline media
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Hierarchical CoS/MoS2 and Co3S4/MoS2/Ni2P nanotubes for efficient electrocatalytic hydrogen evolution in alkaline media

机译：分层COS / MOS2和CO3S4 / MOS2 / NI2P纳米管，用于碱性介质的有效电催化氢气进化

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摘要

Non-noble metal electrocatalysts have recently received increasing attention for the hydrogen evolution reaction (HER) in acidic electrolytes. However, in alkaline electrolyzers, the slow kinetics of water splitting leads to their poor HER activities. Here, we demonstrate the synthesis of novel hierarchical nanotubes of CoS/MoS2 and Co3S4/MoS2/Ni2P which exhibit prominent and durable HER capabilities in alkaline solution. Particularly, the Co3S4/MoS2/Ni2P nanotubes present an onset overpotential of 60 mV, a Tafel slope of 98 mV dec(-1), and a high exchange current density of 0.21 mA cm(-2), which are superior to those exhibited by many noble-metal-free electrocatalysts. The enhanced HER properties of the hybrid nanotubes could be related to their open hollow structure, large surface area and active site number, as well as the synergetic cooperation between different components. The results reported here may provide new inspirations for the construction of advanced nanostructures for promising catalytic applications.
机译：最近，非贵金属电催化剂最近得到了酸性电解质中的氢进化反应（她）的增加。然而，在碱性电解器中，水分裂的缓慢动力学导致他们的活动差。在这里，我们证明了COS / MOS2和CO3S4 / MOS2 / NI2P的新型分层纳米管的合成，其在碱性溶液中表现出突出和耐用的能力。特别地，CO3S4 / MOS2 / NI2P纳米管呈现60 mV的起始过电位，TAFEL斜率为98mV（-1），以及0.21 mA cm（-2）的高交换电流密度，其优于所展示的由许多无金属无金属电催化剂。杂交纳米管的增强性能可能与其开放的空心结构，大表面积和有源部位数有关，以及不同组件之间的协同合作。这里报道的结果可以为建造高级纳米结构以供应催化应用提供新的灵感。

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    Lin Haifeng; Li Haoyi; Li Yanyan; Liu Junli; Wang Xun; Wang Lei;

  • 作者单位

    Qingdao Univ Sci &

    Technol Coll Chem &

    Mol Engn Qingdao 266042 Peoples R China;

    Tsinghua Univ Dept Chem Key Lab Organ Optoelect &

    Mol Engn Beijing 100084 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem &

    Mol Engn Qingdao 266042 Peoples R China;

    Tsinghua Univ Dept Chem Key Lab Organ Optoelect &

    Mol Engn Beijing 100084 Peoples R China;

    Tsinghua Univ Dept Chem Key Lab Organ Optoelect &

    Mol Engn Beijing 100084 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem &

    Mol Engn Qingdao 266042 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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