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Diatomic Fe-Fe catalyst enhances the ability to degrade organic contaminants by nonradical peroxymonosulfate activation system

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Abstract

Atomically dispersed catalysts have been widely studied due to their high catalytic activity and atom utilization. Single-atom catalysts have achieved breakthrough progress in the degradation of emerging organic contaminants (EOCs) by activating peroxymonosulfate (PMS). However, the construction of atomically dispersed catalysts with diatomic/multiatomic metal active sites by activating PMS to degrade pollutants is still seldom reported, despite the unique merits of atom-pair in synergistic electronic modulation and breaking stubborn restriction of scaling relations on catalytic activity. We have synthesized Fe1−N−C, Fe2−N−C, and Fe3−N−C catalysts with monoatomic iron, diatomic iron, and triatomic iron active center, respectively. The results show that the catalytic degradation activity of Fe2−N−C is twice that of Fe1−N−C and Fe3−N−C due to its unique Fe2N6 coordination structure, which fulfilled the complete degradation of rhodamine B (RhB), bisphenol A (BPA), and 2,4-dichlorophenol (2,4-DP) within 2 min. Electron paramagnetic resonance (EPR) and radical quenching experiments confirmed that the reaction was a nonradical reaction on the catalyst surface. And singlet oxygen and Fe(IV) are the key active species.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Nos. 22074137 and 21721003) and the Ministry of Science and Technology of China (No. 2016YFA0203203).

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Authors and Affiliations

  1. College of Chemistry, Jilin University, Changchun, 130012, China

    Minghua Li & Shaojun Dong

  2. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Minghua Li, Jinxing Chen, Weiwei Wu, Shuangli Wu, Lili Xu & Shaojun Dong

  3. University of Science and Technology of China, Hefei, 230026, China

    Jinxing Chen, Weiwei Wu, Shuangli Wu, Lili Xu & Shaojun Dong

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  1. Minghua Li
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  2. Jinxing Chen
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Correspondence to Shaojun Dong.

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Diatomic Fe-Fe catalyst enhances the ability to degrade organic contaminants by nonradical peroxymonosulfate activation system

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Li, M., Chen, J., Wu, W. et al. Diatomic Fe-Fe catalyst enhances the ability to degrade organic contaminants by nonradical peroxymonosulfate activation system. Nano Res. 16, 4678–4684 (2023). https://doi.org/10.1007/s12274-022-5124-6

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  • DOI: https://doi.org/10.1007/s12274-022-5124-6

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