Manganese–iron supported on porous iron foam as efficient periodate activators toward pollutant abatement
Date
2025
Authors
Yao, Y.
Liu, Y.
Ma, Z.
Zhang, L.
Wang, J.
Song, X.
Wang, S.
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Journal article
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Chemical Engineering Science, 2025; 306:121219-1-121219-12
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Yunjin Yao, Yating Liu, Zhenshan Ma, Lijie Zhang, Jingyi Wang, Xueyi Song, Shaobin Wang
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Abstract
The development of highly active porous catalysts is crucial for the efficient catalytic oxidation of organic pollutants. In this study, we synthesized a manganese–iron bimetallic catalyst supported on iron foam (MnFe-IF) using a dual chloride aqueous corrosion method to enhance potassium periodate (PI) activation. The unique morphology and synergistic effects of MnFe-IF led to exceptional activity and durability in degrading various organic pollutants, surpassing conventional non-precious metals and previously reported porous catalysts. Electrochemical evaluations, scavenging tests, and electron spin resonance analysis reveal that an electron transfer mechanism drives organic removal in the MnFe-IF/PI system. The catalyst activates PI, generating high-potential intermediates that significantly enhance pollutant degradation. Additionally, the transformation of Fe(II)/Fe(III) and Mn(II)/Mn(III)/Mn(IV) promotes the cooperative roles of singlet oxygen and superoxide radicals in organic elimination. This work provides new insights into the synthesis of effective porous catalysts for oxidizing organic contaminants.
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