Electrochemical generation of H*-•OH redox pair for rapid removal of refractory nitro-organic micropollutants

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dc.contributor.authorLi, Y.
dc.contributor.authorYan, M.
dc.contributor.authorLin, H.
dc.contributor.authorWang, S.
dc.contributor.authorDuan, X.
dc.contributor.authorWu, X.L.
dc.date.issued2025
dc.description.abstractThis study developed an innovative reduction-oxidation coupling process for treatment of refractory organic wastewater. We constructed a series of N5-coordinated transition metals (TMs) (TMs = Mn, Fe, Co, Ni, Cu) singleatom sites supported on nitrogen-rich carbon nitride (SA-TM-C3N5) for electrochemical generation of the surfaceadsorbed hydrogen atom (H*) and hydroxyl radical (•OH). The SA-Co-C3N5 exhibited the highest activity for production of the H*-•OH redox pair, which effectively degraded refractory nitro-organic micropollutants via the parallel reduction-oxidation pathways. The SA-Co-C3N5-mediated electro-Fenton-like system showed high removal efficiency (99 %) and mineralization capacity (78 %) toward metronidazole (MNZ) with low energy consumption (0.019 kWh (g TOC)–1 ). The trifunctional properties of the H* have contributed to the reduction of nitro compounds, the 2e– ORR for H2O2 production and the Fenton-like catalysis for •OH generation. This work sheds lights on the development of advanced reduction-oxidation coupling process for green and sustainable water purification.
dc.description.statementofresponsibilityYu Li, Minjia Yan, Hongjun Lin, Shaobin Wang, Xiaoguang Duan, Xi-Lin Wu
dc.identifier.citationApplied Catalysis B: Environmental, 2025; 361:124663-1-124663-10
dc.identifier.doi10.1016/j.apcatb.2024.124663
dc.identifier.issn0926-3373
dc.identifier.issn1873-3883
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.orcidDuan, X. [0000-0001-9635-5807]
dc.identifier.urihttps://hdl.handle.net/2440/144514
dc.language.isoen
dc.publisherElsevier BV
dc.relation.granthttp://purl.org/au-research/grants/arc/DP230102406
dc.relation.granthttp://purl.org/au-research/grants/arc/FT230100526
dc.rights© 2024 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
dc.source.urihttp://dx.doi.org/10.1016/j.apcatb.2024.124663
dc.subjectSingle-atom catalysts; Coordination regulation; Electro-Fenton; Oxidation-reduction processes; Adsorbed hydrogen
dc.titleElectrochemical generation of H*-•OH redox pair for rapid removal of refractory nitro-organic micropollutants
dc.typeJournal article
pubs.publication-statusPublished

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