Persulfate activation at cathodic FeN4 single-atom sites in a sustainable FeNC electrocatalyst for fast degradation of antibiotics in water at near-neutral pH
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 treatm...
| Autores: | , , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2023 |
| País: | España |
| Recursos: | Universidad Autónoma de Madrid |
| Repositório: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglês |
| OAI Identifier: | oai:repositorio.uam.es:10486/712330 |
| Acesso em linha: | http://hdl.handle.net/10486/712330 https://dx.doi.org/10.1016/j.mtsust.2023.100581 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Antibiotic residue electrolytic cell piperacillin single-atom catalyst sulfate radical wastewater treatment Física Química |
| Resumo: | 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 |
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