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.
Environ Res. 2021 Sep;200:111474. doi: 10.1016/j.envres.2021.111474. Epub 2021 Jun 15.
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 current density and a small Tafel slope (equal to 67.8 mV dec) 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 H production on an industrial scale. Our work demonstrated a simple way of its preparation, which could be applied to other material groups.
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，它们很容易取代基于贵金属的 HER 催化剂。为了证明这一点，我们使用一种简单、直接和快速的方法（涉及吸收、热解和硫化步骤）制造了 Co、Fe 和 CoS 掺杂的富 N 多孔碳材料（CoFeS/NC），该方法使用 ZIF-67 金属有机骨架（MOF）材料作为前体。所制备的 CoFeS/NC 表现出优异的 HER 性能和长期稳定性：在 1.0 KOH 中，在 10 mA cm 的电流密度下达到低电位（等于 176 mV），并且 Tafel 斜率小（等于 67.8 mV dec）。这种出色的 HER 性能归因于 CoFeS/NC 成分的协同效应，包括独特的中孔性。所有这些特性都确保了存在大量的活性位点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大规模制氢的有前途的材料。我们的工作展示了一种简单的制备方法，该方法可应用于其他材料组。
