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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/206807
Accelerating Fe(III)/Fe(II) redox cycling in heterogeneous electro-Fenton process via S/Cu-mediated electron donor-shuttle regime
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In this study, we developed a Cu0.5Fe2.5S4 nanocatalyst through facile sulfidation of the Cu-MIL-88B(Fe) precursorto expedite surface Fe(III) reduction and enhance H2O2 activation in the heterogeneous electro-Fenton(HEF). The as-prepared catalyst possesses relatively large specific surface area and uniformly dispersed metalactive sites. The Cu0.5Fe2.5S4-catalyzed HEF system allowed complete removal of naproxen with minimal metalleaching, surpassing that of Cu-MIL-88B(Fe) or Fe3S4. Quantitative XPS analysis, electrochemical characterizationand density functional theory calculations reveal an electron donor-shuttle regime in which S2- and Cuspecies serve as the electron donor and shuttle, respectively. The Cu species significantly accelerate the internalelectron transfer between S and Fe and mitigate the dissolution of the adjacent iron sites, securing the sustainablereducing capacity. Moreover, Cu0.5Fe2.5S4-based HEF exhibits great practicability for treatment of various organicsin urban wastewater. This study opens new avenue for addressing the challenge of sluggish Fe(III)/Fe(II)cycling in HEF.
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WANG, Chao, ZHANG, Wenfeng, WANG, Jingwen, XIA, Pan, DUAN, Xiaoguang, HE, Qiang, SIRÉS SADORNIL, Ignacio, YE, Zhihong. Accelerating Fe(III)/Fe(II) redox cycling in heterogeneous electro-Fenton process via S/Cu-mediated electron donor-shuttle regime. _Applied Catalysis B-Environmental_. 2023. Vol. 342, núm. 1-12. [consulta: 25 de febrer de 2026]. ISSN: 0926-3373. [Disponible a: https://hdl.handle.net/2445/206807]