Activation of peroxymonosulfate by MnO2 with oxygen vacancies: Degradation of organic compounds by electron transfer nonradical mechanism

MnO2 Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

“…Electron paramagnetic resonance (EPR) was further applied to identify the generated ROS, and 5,5-dimethyl-1-pyrroline- N -oxide (DMPO) and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMP) were used as trapping agents for EPR tests. − As shown in Figure e, no obvious DMPO-•OH DMPO-SO 4 •– and DMPO-O 2 •– signals were detected, which demonstrated that a limited amount of •OH, SO 4 •– , and O 2 •– was generated in the 3D-MNSN-CF/PMS system. − However, a sharp signal of TEMP- 1 O 2 was obviously detected. Based on the results of quenching experiments, it can be concluded that 1 O 2 is the main ROS for oxidizing TC, which means the 3D-MNSN-CF/PMS system possesses a typical nonradical process during the TC degradation. , …”

Asymmetric structural tuning of industrial MnO2 arrays on a hierarchical lead-based anode for manganese metallurgy

“…By introducing Mn 3+ in the MnO 2 lattice by chemical or electrochemical techniques, 6,7 oxygen vacancies (O v ) spontaneously form for charge compensation. [8][9][10] The local strain of the space lattice triggers the reduction of the Mn-O band coordination number and the orbital degeneracy of the e g orbitals of Mn 3+ . 11,12 The improved d-orbital exchange interaction with the OER intermediates and elongated Mn-O bonds result in the boost of water oxidation electrocatalysis.…”

Crystallinity regulation-induced organic degradation on ultra-thin 2D Co3O4/SiO2 nanosheets: the critical trigger of oxygen vacancies

“…[22][23][24][25] The rational design of catalysts to overcome the activity-stability tradeoff is still needed to accelerate the practical application of the PMS oxidation process. 10,26 Two-dimensional (2D) nanomaterials have garnered significant attention due to their remarkable catalytic properties arising from active edge site effects, specific exposed facets, and enhanced transport properties in reduced dimensions. 27,28 Various methods, including mechanical exfoliation, ion intercalation/exfoliation, chemical vapor deposition (CVD), and wet-chemical synthesis, have been explored for the fabrication of 2D frameworks.…”

“…22–25 The rational design of catalysts to overcome the activity–stability tradeoff is still needed to accelerate the practical application of the PMS oxidation process. 10,26…”