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首页> 外文期刊>RSC Advances >A flower-like CoS2/MoS2 heteronanosheet array as an active and stable electrocatalyst toward the hydrogen evolution reaction in alkaline media
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A flower-like CoS2/MoS2 heteronanosheet array as an active and stable electrocatalyst toward the hydrogen evolution reaction in alkaline media

机译：花样COS2 / MOS2 HeteronAnosheCeN阵列作为碱性介质中氢进化反应的活性和稳定的电催化剂

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摘要

CoS2/MoS2 heteronanosheet arrays (HNSAs) with vertically aligned flower-like architectures are fabricated through in situ topotactic sulfurization of CoMoO4 nanosheet array (NSA) precursors on conductive Ni foam. CoMoO4 NSAs are prepared by a self-template hydrothermal method without using any hard template and surfactant. Benefiting from a 3D flower-like architecture constituted by ultrathin nanosheets with abundant exposed heterointerfaces as highly active sites and predesigned void spaces, the as-synthesized CoS2/MoS2 HNSAs exhibit an excellent hydrogen evolution reaction (HER) performance with a low overpotential of 50 mV at 10 mA cm(-2), and a small Tafel slope of 76 mV dec(-1) in 1.0 M KOH, which outperforms most previously reported CoS2 and MoS2 based electrocatalysts with compositional or morphological similarity. This work demonstrates the great potential in developing high-efficiency and earth-abundant electrocatalysts for alkaline HER through heterointerface engineering and morphological design by utilizing transition metal molybdate as a promising platform.
机译：COS2 / MOS2 HeterOnanosheL阵列（HNSAS）具有垂直对齐的花样架构，通过在导电Ni泡沫上的COMO4纳米片阵列（NSA）前体的原位拓扑硫化来制造。 COMO4 NSA通过自动模板水热法制备而不使用任何硬模板和表面活性剂。受益于由超纳米片构成的3D花样架构，其具有丰富的暴露异料蔗种作为高活性部位和预测的空隙空间，所合成的COS2 / MOS2 HNSAS表现出优异的氢进化反应（她的）性能，具有50 mV的低流量在10 mA cm（-2）中，在1.0 m KOH中为76mV DEC（-1）的小TAFEL斜率，这优于最先前报告的COS2和基于组成或形态相似性的电催化剂。这项工作通过利用过渡金属钼酸盐作为有前途的平台，通过异化器钼酸盐来发展高效和地球丰富的电催化剂的巨大潜力。

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  • 来源
    《RSC Advances》 |2020年第15期|共9页
  • 作者

    Shi Mengtong; Yang Zhang; Zhu Yaxing; Wang Wei; Wang Changzheng; Yu Aifang; Pu Xiong; Zhai Junyi;

  • 作者单位

    Beijing Univ Civil Engn &

    Architecture Minist Educ Key Lab Urban Stormwater Syst &

    Water Environm Beijing 100044 Peoples R China;

    Chinese Acad Sci Beijing Inst Nanoenergy &

    Nanosyst Beijing 100083 Peoples R China;

    Chinese Acad Sci Beijing Inst Nanoenergy &

    Nanosyst Beijing 100083 Peoples R China;

    Chinese Acad Sci Beijing Inst Nanoenergy &

    Nanosyst Beijing 100083 Peoples R China;

    Beijing Univ Civil Engn &

    Architecture Minist Educ Key Lab Urban Stormwater Syst &

    Water Environm Beijing 100044 Peoples R China;

    Chinese Acad Sci Beijing Inst Nanoenergy &

    Nanosyst Beijing 100083 Peoples R China;

    Chinese Acad Sci Beijing Inst Nanoenergy &

    Nanosyst Beijing 100083 Peoples R China;

    Chinese Acad Sci Beijing Inst Nanoenergy &

    Nanosyst Beijing 100083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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