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首页> 外文期刊>Environmental research >ZIF-67-derived N-enriched porous carbon doped with Co, Fe and CoS for electrocatalytic hydrogen evolution reaction
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ZIF-67-derived N-enriched porous carbon doped with Co, Fe and CoS for electrocatalytic hydrogen evolution reaction

机译：ZIF-67-衍生的N-富集的多孔碳掺杂有CO，Fe和Co，用于电催化氢进化反应

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摘要

Hybrid composites based on transition metal-doped materials exhibit excellent performance and stability as electrocatalysts for the hydrogen evolution reaction (HER). Thus, they could easily replace HER catalysts based on noble metals. To demonstrate this, we fabricated Co, Fe, and CoS doped N-enriched porous carbon materials (CoFeS/NC) using a simple, straightforward and quick method (involving absorption, pyrolysis and sulfidation steps), which used ZIF-67 metal-organic framework (MOF) material as a precursor. The fabricated CoFeS/NC showed excellent HER performance and long-term stability: it achieved a low potential (equal to 176 mV) at 10 mA cm~(-2) current density and a small Tafel slope (equal to 67.8 mV dec~(-1)) in 1.0 KOH. Such outstanding HER performance was attributed to the synergistic effect of the CoFeS/NC components, including unique meso-porosity. All these properties ensured the presence of numerous active sites and high conductivity provided by the carbon matrix. The excellent CoFeS/NC electrocatalytic activity makes it a promising material for H_2 production on an industrial scale. Our work demonstrated a simple way of its preparation, which could be applied to other material groups.
机译：基于过渡金属掺杂材料的杂化复合材料表现出优异的性能和稳定性，作为氢进化反应（她）的电催化剂。因此，它们可以容易地基于贵金属替代她的催化剂。为了证明这一点，我们使用使用简单，直接的和快速的方法（涉及吸收，热解和硫化步骤）来制造CO，Fe和COS掺杂的N-富集的多孔碳材料（Cofes / NC），其使用ZIF-67金属 - 有机物框架（MOF）材料作为前体。制造的COFES / NC显示出优异的性能和长期稳定性：它在10 mA cm〜（-2）电流密度和小TAFEL坡度（等于67.8mV〜（ -1））在1.0 koh中。这种优秀的性能归因于Cofes / NC组分的协同作用，包括独特的中间孔隙度。所有这些属性确保存在许多有源网站和由碳基质提供的高导电性。优异的Cofes / NC电催化活性使其成为工业规模的H_2生产的有希望的材料。我们的工作表现出一种简单的准备方式，可以应用于其他材料群体。

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  • 来源
    《Environmental research》 |2021年第9期|111474.1-111474.6|共6页
  • 作者

    Shichao Wu; Xiangrui Yang;

  • 作者单位

    Department of Nuclear Medicine (PET Center) Xiangya Hospital Central South University Changsha Hunan 410008 PR China Key Laboratory of Nanobiological Technology of National Health Commission Xiangya Hospital Central South University Changsha Hunan 410008 PR China National Clinical Research Center for Geriatric Disorders Xiangya Hospital Central South University Changsha Hunan 410008 PR China;

    Department of Nuclear Medicine (PET Center) Xiangya Hospital Central South University Changsha Hunan 410008 PR China Key Laboratory of Nanobiological Technology of National Health Commission Xiangya Hospital Central South University Changsha Hunan 410008 PR China National Clinical Research Center for Geriatric Disorders Xiangya Hospital Central South University Changsha Hunan 410008 PR China;

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  • 正文语种 eng
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  • 关键词

    CoFeS/NC; Hydrogen evolution reaction; Active sites; Carbon matrix; Conductivity;

    机译：cofes / nc;氢气进化反应;积极场所;碳矩阵;电导率;

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