催化作用
降级(电信)
益达胺
对偶(语法数字)
Atom(片上系统)
化学
双重角色
光化学
组合化学
有机化学
杀虫剂
工程类
电气工程
嵌入式系统
生物
艺术
文学类
农学
作者
Xinzhi Wang,Shibo Zhu,Bihong Lv,Ziyi Lin,Yue Xie,Qiao Zhou,Yiquan Qiu,Chao Zhang,Xiaohui Yi,Mingzhi Huang
标识
DOI:10.1016/j.cej.2025.162063
摘要
• Dual atom catalyst FeNi DA @1T-MoS 2 with high catalytic activity was prepared. • FeNi DA @1T-MoS 2 demonstrate excellent PMS activation performance. • FeNi DA @1T-MoS 2 /PMS oxidation process could efficiently eliminate IMI . • Degradation mechanism of IMI dominated by the radical pathway was revealed. • Synergistic interaction between Fe and Ni atoms in FeNi DA @1T-MoS 2 was demonstrated. Atomically dispersed heterogeneous catalysts (ADCs), represented by single-atom catalysts (SACs), have received much attention in the research of peroxymonosulfate-based advanced oxidation processes (PMS-AOPs), which has effectively solved the environmental problems caused by various emerging contaminants. However, single-atom catalysts suffer from the limitation of not being able to cope with multistep reactions using a solitary active site. This study synthesized the dual-atom catalyst FeNi DA @1T-MoS 2 by introducing Fe and Ni atoms into 1T-MoS 2 with metallic properties, which exerted the synergistic interaction of Fe and Ni atoms while maintaining the atom-dispersed properties to enhance the spontaneity of PMS adsorption and further reduce the adsorption energy barriers of PMS at the active sites. The degradation kinetic constants of the target contaminant imidacloprid were significantly increased up to 3.6-fold by the efficient activation of PMS. Additionally, this study defines the metal contribution factor and verifies the existence of synergistic interaction between Fe and Ni atoms by comparing experimental data with theoretical values. The dominant reactive oxygen species in the degradation process were identified by quenching experiments, EPR, and probe experiments as SO 4 - · and · OH, corresponding to a contribution of 76.72 % and 14.48 %, respectively. This work reveals the synergistic catalytic interaction of dual atoms by combining experiments with theoretical calculations and systematically elucidates the degradation mechanism of the target pollutants. This work reveals the synergistic catalytic interaction of dual-atom catalysts by combining experiments with theoretical calculations, and systematically elucidates the degradation mechanism of target pollutants. Meanwhile, it also provides a technical reference for the development of novel dual-atom catalysts and efficient emerging contaminant treatment technologies.
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