2026-04-17T17:22:14Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2187082025-11-19T20:33:26Zcom_2072_1057col_2072_478796col_2072_478917

00925njm 22002777a 4500 dc Tirira, Paola author Mirehbar, S. author Fernández-Velayos, S. author Herrasti, P. author Menéndez, N. author Recio, F.J. author Sirés Sadornil, Ignacio author 2025-02-12T13:00:48Z 2025-10-12T05:10:14Z 2023-10-13 2025-02-12T13:00:48Z Cathodic persulfate (PS) activation mediated by solid-state Fe(II) produced in situ in a continuous manner has recently emerged as a powerful strategy to degrade organic pollutants. Conversely, the use of single-atom catalysts (SACs) that is now widespread in heterogeneous catalysis for water treatment has never been explored for the design of superior electrocatalysts for PS activation. In this work, the pyrolysis of abundant biopolymer chitosan mixed with an iron salt yielded abundant (15%) single-atom-metal sites (FeN4) coordinated with a graphitic matrix. For the first time, PS activation at cathodic FeII–N–C moieties (Eonset ∼0.65 V|RHE) is demonstrated to be highly effective for the fast degradation of a model antibiotic like piperacillin, being totally removed even in urban wastewater after 90 min at 20 mA cm−2. Aigües residuals Sulfats Antibiòtics Sewage Sulfates Antibiotics Persulfate activation at cathodic FeN4 single-atom sites in a sustainable FeNC electrocatalyst for fast degradation of antibiotics in water at near-neutral pH