Title：

Switching on PMS Activation in Standby Mode by Organic Pollutant on Single-atom Cu with Regulated Local Coordination Geometry

Abstract：

     Fenton-like reaction using peroxymonosulfate (PMS) as oxidant unavoidably introduces sulfate ion into effluent. It is highly desirable to develop efficient reaction system to minimize PMS input during water treatment. The process of pollutant-driven PMS consumption is realized on single-atom Cu site. Meanwhile, single-atom Cu with coordination configuration of Cu−N₄ exhibits a catalytic activity that is 6.6 times of that on Cu−N₃C₁ sites in terms of bisphenol A (BPA) degradation in the presence of PMS. Mechanistic investigations demonstrate the critical role of high-valent Cu(III)−oxo species for the selective removal of organic pollutants. SAC-CuN4 shows a remarkable water treatment capacity, which is 153.6 and 172.8 L per gram catalyst for treating water with 0.1 mM 4-chlorophenol and sulfametoxydiazine, respectively. The findings in this study are instructive to the design of efficient Fenton-like reaction system for elimination of micropollutant with low PMS dosage.

Wang K.;Cui, J.; Gao Y.; Li L.;  Qin W.; Hu Z.; Zhao Y.,Switching on PMS Activation in Standby Mode by Organic Pollutant on Single-atom Cu with Regulated Local Coordination Geometry.J. Environ. Chem. Eng.13 (2025) 117963.