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Updated: Sep 12, 2025

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通过Fe-N₅生成提高Fe原子密度和形成Fe (IV) 在H₂O₂基芬顿反应的催化剂中

Jiaru Li¹, Qiang Le¹, Zhaodong Nan¹

¹School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.

Langmuir : the ACS journal of surfaces and colloids

|August 9, 2025

概括

这项研究开发了一种具有高单原子密度的新型铁催化剂,显著提高了用于净化水的芬顿式反应. 它有效地产生高价值铁 (Fe^IVO) 用于污染物降解.

科学领域:

催化剂是一种催化剂.
环境化学环境化学
材料科学材料科学材料科学

背景情况:

单原子催化剂 (SAC) 对芬顿式反应具有前景,但其铁 (Fe) 原子密度较低.
高价值铁物种,特别是Fe^IVO,对于高效的污染物降解至关重要,但在基于H₂O₂的芬顿式工艺中很少产生.
现有的基于Fe的催化剂通常具有正常的Fe-N₄协调.

研究的目的:

合成和描述一种新的基于Fe的催化剂,具有增强的Fe原子密度和Fe-N₅协调.
为了研究在基于H2O的芬顿式反应中产生高价值铁物种 (Fe^IVO) 的过程.
阐明Fe物种之间的协同作用以及它们在催化活性和污染物降解中的作用.

主要方法:

基于Fe的单原子催化剂的合成和表征.
分析Fe原子和Fe集群的共存和协调 (Fe-N₅与Fe-N₄).
密度函数理论 (DFT) 计算和催化机制的实验验证.

主要成果:

合成的催化剂具有高Fe含量 (13.7 wt %),表面Fe原子与Fe集群的比例高 (89.8%).
观察到五度协调的Fe原子 (Fe-N₅),与典型的Fe-N₄不同.
成功生成了Fe^IVO物种,Fe-N₅和Fe集群之间的协同效应增强了催化活性和Fe^IVO形成.
催化剂证明了富含电子的污染物如四环素化的选择性降解,非基因性通路由Fe^IVO主导.

结论:

这种新的基于Fe的催化剂具有高Fe原子密度和Fe-N₅位点,显著增强了类似Fenton的反应.
Fe-N₅和Fe集群之间的协同作用促进Fe^IVO的形成,这对于有效降解污染物至关重要.
催化剂提供了一个有前途的解决方案,通过主导的非激进路径选择性净化水.

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Catalysis

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