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首页> 外文期刊>Advanced energy materials >A New Platinum-Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single-Crystal Metallic Interweaved V_8C_7 Networks
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A New Platinum-Like Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH: Single-Crystal Metallic Interweaved V_8C_7 Networks

机译：一种新型的类似于铂的高效电催化剂，可在所有pH下进行氢释放反应：单晶金属交织的V_8C_7网络

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摘要

Exploring low-cost hydrogen evolution reaction (HER) catalysts with remarkable activity over wide pH range (0-14) still remains an enormous challenge. Herein, for the first time, a novel platinum-like, double-deck carbon coated V8C7 networks with the highly active (110) facet exposed as a new efficient HER electrocatalyst is reported. The single-crystal interweaved V8C7 networks are designed and fabricated based on a low crystal-mismatch strategy and confinement effect of double-deck carbon coating. In addition, electrochemical tests and theoretical simulation indicate that the metallic character of V8C7, high-activity of exposed facet, and low barrier energy for water dissociation can contribute to highly catalytic activity of HER. Impressively, the HER performances of the interweaved V8C7 networks can be comparable to those of Pt at an all-pH environment, with Tafel slopes of 44, 64, and 34.5 mV dec(-1) and overpotential of 47, 77, and 38 mV at -10 mA cm(-2) in 1 M KOH, 0.1 M phosphate buffer, and 0.5 M H2SO4, respectively. This work provides a blueprint for exploring new-type platinum-like catalysts for various energy conversion systems.
机译：探索在宽pH范围（0-14）内具有显着活性的低成本制氢反应（HER）催化剂仍然是巨大的挑战。在此，首次报道了一种新型的类铂，双层碳涂层的V8C7网络，该网络具有作为新的高效HER电催化剂而暴露的高活性（110）小平面。基于低晶体失配策略和双层碳涂层的封闭效应，设计和制造了单晶交织的V8C7网络。此外，电化学测试和理论模拟表明，V8C7的金属特性，暴露的小面的高活性以及对水离解的低势垒能可促进HER的高催化活性。令人印象深刻的是，交织在一起的V8C7网络的HER性能在全pH环境下可以与Pt媲美，Tafel斜率分别为dec（-1）为44、64和34.5 mV dec（-1），超电势为47、77和38 mV分别在1 M KOH，0.1 M磷酸盐缓冲液和0.5 M H2SO4中的-10 mA cm（-2）处。这项工作为探索用于各种能量转换系统的新型铂类催化剂提供了一个蓝图。

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  • 来源
    《Advanced energy materials》 |2018年第23期|1800575.1-1800575.7|共7页
  • 作者

    Xu Haitao; Wan Jing; Zhang Huijuan; Fang Ling; Liu Li; Huang Zhengyong; Li Jian; Gu Xiao; Wang Yu;

  • 作者单位

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

    Chongqing Univ, Dept Appl Phys, 55 Daxuecheng South Rd, Chongqing 401331, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

    Chongqing Univ, Dept Appl Phys, 55 Daxuecheng South Rd, Chongqing 401331, Peoples R China;

    Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, 174 Shazheng St, Chongqing 400044, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    hydrogen evolution reaction; interweaved networks; single-crystal; V8C7;

    机译：析氢反应交织网络单晶V8C7;

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