Controllable redox-induced in-situ growth of MnO2 over Mn2O3 for toluene oxidation: Active heterostructure interfaces

Interfacial effects in CuO/Co3O4 heterostructures enhance benzene catalytic oxidation performance

“…26 The interfacial effect of metal/support catalysts is wellknown, [27][28][29][30] especially for hybrid metal oxides. [31][32][33] Ding et al 34 prepared Co 3 O 4 -CuCoO 2 nanomesh via a facile hydrothermal approach. Their results demonstrated that the interface-enhanced nanocatalyst favoured simultaneous CO adsorption and O 2 activation, which led to high catalytic activity in the CO oxidation reaction.…”

Excellent oxidation activity of toluene over core–shell structure Mn2O3@MnO2: role of surface lattice oxygen and Mn species

“…The H 2 ‐TPR curve (Fig. 5) of the Mn 2 O 3 catalyst can be fitted into three reduction peaks at 202 (peak I), 300 (peak III) and 385 °C (peak IV), which are classified as the reduction of surface oxygen species, Mn 2 O 3 to Mn 3 O 4 and Mn 3 O 4 to MnO, respectively 35,36 . For the MnO x ‐1 and MnO x ‐2 catalysts, four reduction peaks can be fitted to the curve in Fig.…”

“…5) of the Mn 2 O 3 catalyst can be fitted into three reduction peaks at 202 (peak I), 300 (peak III) and 385 °C (peak IV), which are classified as the reduction of surface oxygen species, Mn 2 O 3 to Mn 3 O 4 and Mn 3 O 4 to MnO, respectively. 35,36 For the MnO x -1 and MnO x -2 catalysts, four reduction peaks can be fitted to the curve in Fig. 5: the new reduction peak at 274 °C (peak II) corresponds to Mn 4+ species reduced to Mn 3+ species or the reduction of active manganese species at the interface 17 ; the reduction peak near 294 °C (peak III) is attributed to the reduction of Mn 2 O 3 to Mn 3 O 4 ; and Mn 3 O 4 is reduced to MnO at 326 °C (peak IV).…”

“…Thus, some researchers have tried to modify Mn 2 O 3 using various methods to obtain catalysts with much higher activity and stability. Li's group investigated the influence of active heterostructure interfaces on toluene oxidation by in situ growth of MnO 2 over Mn 2 O 3 , 35 and the effect of isolated Cu ⊐+ insertion into the mezzanine of surface MnO 2 coating on catalytic oxidation of toluene and propene. 36 Niu et al 37 synthesized Co-doped and Ni-doped Mn 2 O 3 onedimensional nanowire using a solvothermal method.…”

A Review of Manganese(III) (Oxyhydr)Oxides Use in Advanced Oxidation Processes

“…The enhanced degradation of MB was attributed to the hampered electron-hole recombination due to the loading of Ag and graphene. Furthermore, the studies regarding the application of modified Mn 2 O 3 in oxidants (such as PMS, ) activation for contaminants removal were also reported [ 84 , 99 , 100 , 101 ]. For example, Saputra et al prepared an egg-shaped core/shell α-Mn 2 O 3 @α-MnO 2 catalyst via a hydrothermal process and investigated the catalytic activity of α-Mn 2 O 3 @α-MnO 2 in heterogeneous Oxone® activation for phenol degradation [ 84 ].…”