2026-10-12T08:11:18Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34031224 2026-09-30T10:10:43Z category_1 category_4 category_7 category_21 category_873 portal_63 item_type_6 month_year_09_2026

Unraveling Cathodic Defect-Electric Field Synergism in the Enhanced Electroactivation of Peroxydisulfate for Highly Efficient Removal of Emerging Contaminants Guanyu Liu (3144195) Xueying Ren (7879703) Wenqi You (25143109) Huizhong Wu (9383030) Xiuwu Zhang (18655) Jiayi He (579930) Xiaoya Yin (14136598) Minghua Zhou (822341) Biophysics Biochemistry Medicine Biotechnology Chemical Sciences not elsewhere classified yielding high steady treating emerging contaminants theoretical calculations revealed reactive species generation meet discharge standards low energy consumption local electronic structure field modulation framework 96 × 10 55 × 10 electric field synergism electric field cooperated highly efficient removal unraveling cathodic defect v </ sub sup >·</ sup 3 +</ sup specific electric smx removal thermodynamic barrier thereby modulating sustainable pathway study prepared study established state concentrations simultaneously enhancing remove sulfamethoxazole reaction process rational design oxygen vacancies generalizable strategy experimental characterization cycling efficiency critical challenge continuous operation cathode interfaces band center achieving 100 094 kwh Cathodic electroactivation of peroxydisulfate (PDS) provides a sustainable pathway for treating emerging contaminants, yet the rational design of cathode interfaces to maximize electric field synergy remains a critical challenge. Herein, this study prepared a modified carbon felt cathode with defective D-MIL-88B(Fe) (D-MOF/CF) containing coordinatively unsaturated Fe sites (Fe CUS) and oxygen vacancies (O_V), which showed greatly enhanced effectiveness for the electroactivation of PDS to remove sulfamethoxazole. Experimental characterization and theoretical calculations revealed that the electric field cooperated with O_V to induce local charge rearrangement, thereby modulating the local electronic structure and d-band center of Fe CUS, lowering the thermodynamic barrier for reactive species generation and simultaneously enhancing the Fe²⁺/Fe³⁺ cycling efficiency. This defect-electric field synergy substantially accelerated PDS activation kinetics, yielding high steady-state concentrations of ^·OH (5.96 × 10^–10 M) and SO₄^·– (3.55 × 10^–10 M) in the reaction process of the E-D-MOF/CF-PDS system and achieving 100% SMX removal with an electrical energy per order of 0.094 kWh m^–3 order^–1. In addition, the system exhibited promising preliminary stability in continuous operation and effectiveness in treating real mariculture tailwater to meet discharge standards with low energy consumption. This study established a site-specific electric-field modulation framework, offering a generalizable strategy for designing efficient electrocatalytic interfaces toward sustainable water remediation. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/acs.est.6c07096.s001 https://figshare.com/articles/journal_contribution/Unraveling_Cathodic_Defect-Electric_Field_Synergism_in_the_Enhanced_Electroactivation_of_Peroxydisulfate_for_Highly_Efficient_Removal_of_Emerging_Contaminants/34031224 CC BY-NC 4.0