Origin of the improved reactivity of MoS2 single crystal by confining lattice Fe atom in peroxymonosulfate-based Fenton-like reaction

Mo Vacancy-Mediated Activation of Peroxymonosulfate for Ultrafast Micropollutant Removal Using an Electrified MXene Filter Functionalized with Fe Single Atoms

“…Previous studies have reported that Mo vacancies can adsorb and decompose PMS to generate ROS. 41,42 The intensities of the XPS Mo 3d peaks obtained from the Fe-SA/Mo 2 TiC 2 T x filter (Figure S27) were greater than those of its Fe-NP counterpart. This implied a higher concentration of exposed Mo around the Fe-SA sites for the activation of PMS compared with Fe-NP.…”

Reactive oxygen species on transition metal-based catalysts for sustainable environmental applications

“…Note that the catalysts containing different types of transition metals are frequently found to give the same type of ROS. 16,[184][185][186] Hence, it should not just be the type of transition metal ions controlling the selectivity and efficiency of ROS generation. 187 Recent studies have shown that modulation of the geometrical and electronic structures of catalysts is a key to probe how to customize the ROS production.…”

“…Heterogeneous transition metal-based catalysts (e.g., oxides, 12 hydroxides, 13,14 oxyhydroxides, 15 and suldes 16 ) are readily used in AOPs. Their advantages include earth abundance, high stability, low cost, etc.…”

Single–atom catalysts based on Fenton-like/peroxymonosulfate system for water purification: design and synthesis principle, performance regulation and catalytic mechanism

“…55,63 Taking the Fe@MoS 2 /PMS system as an example, the active species that play a major role in the Fenton-like oxidative degradation of atrazine (ATZ) were characterized and confirmed by EPR and radical quenching experiments. 134 As shown in Fig. 9a, the spin capture EPR experiment using 5,5-dimethyl-1-pyrroline N -oxide (DMPO) as a trapping agent showed that both HO˙ and SO 4 ˙ − play a role in the MoS 2 /PMS and Fe@MoS 2 /PMS systems, which are marked by pink circles and brown triangles, belonging to the DMPO-HO˙ adducts (four peaks) and DMPO-SO 4 ˙ − adducts (six peaks), respectively.…”

“…137 The oxidation degradation pathway dominated by nonradicals has wide applicability and adaptability for practical use in environmental remediation because it plays a significance role in real wastewater systems with anions such as humic acid (HA), Cl − , HCO 3 − , H 2 PO 4 − , NO 3 − and SO 4 2− compared with the traditional active radicals. 82,134…”