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ZIF-67-derived N-enriched porous carbon doped with Co, Fe and CoS for electrocatalytic hydrogen evolution reaction
Environmental Research ( IF 8.3 ) Pub Date : 2021-06-15 , DOI: 10.1016/j.envres.2021.111474
Shichao Wu 1 , Xiangrui Yang 1
Affiliation  

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 mesoporosity. 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 H2 production on an industrial scale. Our work demonstrated a simple way of its preparation, which could be applied to other material groups.



中文翻译:

ZIF-67衍生的富氮多孔碳掺杂Co、Fe和CoS用于电催化析氢反应

基于过渡金属掺杂材料的杂化复合材料作为析氢反应 (HER) 的电催化剂表现出优异的性能和稳定性。因此,它们可以轻松替代基于贵金属的 HER 催化剂。为了证明这一点,我们使用简单、直接和快速的方法(包括吸收、热解和硫化步骤)制造了 Co、Fe 和 CoS 掺杂的富氮多孔碳材料(CoFeS/NC),该方法使用 ZIF-67 金属有机框架(MOF)材料作为前驱体。制造的 CoFeS/NC 显示出优异的 HER 性能和长期稳定性:它在 10 mA cm -2电流密度下实现了低电位(等于 176 mV)和小塔菲尔斜率(等于 67.8 mV dec -1) 1.0 KOH。如此出色的 HER 性能归因于 CoFeS/NC 组分的协同效应,包括独特的介孔性。所有这些特性确保了碳基体提供的众多活性位点和高导电性的存在。优异的 CoFeS/NC 电催化活性使其成为工业规模生产H 2的有前途的材料。我们的工作展示了一种简单的制备方法,可以应用于其他材料组。

更新日期:2021-06-15
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