Tailoring single-atom FeN4 moieties as a robust heterogeneous catalyst for high-performance electro-Fenton treatment of organic pollutants
| Autor: | Pan Xia, Zhihong Ye, Lele Zhao, Qian Xue, Sonia Lanzalaco, Qiang He, Xueqiang Qi, Ignasi Sirés |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. IMEM-BRT- Innovation in Materials and Molecular Engineering - Biomaterials for Regenerative Therapies |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
History
Depuració de l'aigua Polymers and Plastics Water purification Metal-organic framework Process Chemistry and Technology Oxidació electroquímica Contaminants orgànics de l'aigua Advanced oxidation process Industrial and Manufacturing Engineering Catalysis Single-atom catalyst Electrolytic oxidation Enginyeria química [Àrees temàtiques de la UPC] Catàlisi Organic water pollutants Electro-Fenton Water treatment Business and International Management General Environmental Science |
| Popis: | An iron single-atom catalyst, composed of robust FeN4 moieties anchored on a nitrogen-doped porous carbon matrix (Fe-SAC/NC), has been developed via a surfactant-coordinated metal-organic framework (MOF) approach for application in heterogeneous electro-Fenton (HEF) process. The cohesive interaction between the surfactant and MOF precursor enabled the formation of abundant and stable FeN4 moieties. The Fe-SAC/NC-catalyzed HEF allowed the complete degradation of 2,4-dichlorophenol with low iron leaching (1.2 mg L-1), being superior to nanoparticle catalyst synthesized without surfactant. The experiments and density functional theory (DFT) calculations demonstrated the dominant role of single-atom FeN4 sites to activate the electrogenerated H2O2 yielding •OH. The dense FeN4 moieties allowed harnessing the modulated electronic structure of the SAC to facilitate the electron transfer, whereas the adjacent pyrrolic N enhanced the adsorption of target organic pollutants. Moreover, the excellent catalysis, recyclability and viability of the Fe-SAC/NC were verified by successfully treating several organic pollutants even in urban wastewater. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|