Details

Autor(en) / Beteiligte

• Xia, Pan
• Ye, Zhihong
• Zhao, Lele
• Xue, Qian
• Lanzalaco, Sonia
• He, Qiang
• Qi, Xueqiang
• Sirés, Ignasi

Titel

Tailoring single-atom FeN4 moieties as a robust heterogeneous catalyst for high-performance electro-Fenton treatment of organic pollutants

Ist Teil von

• Applied catalysis. B, Environmental, 2023-03, Vol.322, p.122116, Article 122116

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. [Display omitted] •Synthesis of FeN4 moieties on N-doped carbon for effective electro-Fenton treatment.•Simultaneous increase of activity and stability of catalysts by single-atom strategy.•Superiority of SAC over nanoparticle catalyst for degradation of organic pollutants.•H2O2 activation mechanism validated through DFT analysis.•High recyclability of SAC and remarkable performance in urban wastewater matrix.