Generation of abundant defects in Mn-Co mixed oxides by a facile agar-gel method for highly efficient catalysis of total toluene oxidation

Catalytic Combustion of Toluene Over Broccoli‐Shaped Ce1Mn3Ox Solid Solution

“…Research has demonstrated that the adsorption of oxygen species on the surface is beneficial to the demethylation reaction, while lattice oxygen is beneficial to the deep oxidation of VOCs [23,39] . The peak position corresponding to lattice oxygen of CeMnOx series samples all shifted to low temperature, indicating that the catalyst was easier to release surface/subsurface reactive oxygen species, and the temperature required for deep oxidation of VOCs was lower than pure MnO 2 or CeO 2 [45] …”

Identifying the Fe3Mn3O8 phase as a superior catalyst for low-temperature catalytic oxidation of formaldehyde in air

“…S6 † shows the nitrogen adsorption-desorption isotherms of the Fe-Mn catalysts and the Mn 3 O 4 and Fe 2 O 3 samples, respectively. This demonstrates that all these catalysts had a type IV N 2 isotherm but with distinct H 3 -shaped hysteresis loops 28,38 in the p/p 0 range of 0.9-1.0, 0.92-1.0, 0.66-1.0, 0.6-1.0, and 0.72-1.0 for the Fe 2 O 3 , Mn 3 O 4 , Fe : Mn (3 : 1), Fe : Mn (1 : 1) and Fe : Mn (1 : 3) catalysts, respectively, which should be due to the aggregation of nanoparticles to form slitlike porous pores. Table 1 shows that the Fe : Mn (1 : 1) catalyst presented the highest surface area (44.1 m 2 g −1 ) and smallest average pore diameter (7.8 nm).…”

“…17,18 Mixed Mn-Co oxide catalysts have been developed to generate oxygen defects and higher Mn 4+ concentration by a facile agar-gel method. 28 Abundant Fe species with nontoxicity features have also been broadly investigated for catalytic oxidation. [29][30][31] Fe-Ce mixed oxides distributed in mesochannels of SBA-15 with controlled oxygen vacancy concentrations showed high activity and good stability even at a low temperature (94% conversion at 60 °C).…”

Catalytic Combustion of Toluene over Highly Dispersed Cu-CeOx Derived from Cu-Ce-MOF by EDTA Grafting Method

“…Cu- [9], Mn- [10], Co- [11] and Ce- [12] based oxides are widely researched due to their rich variety, low cost and long service life [13]. Toluene catalytic combustion process with transition metal oxide catalysts has been generally considered to follow the Mars-van Krevelen (MvK) mechanism [14,15]. Transition metal oxide catalysts provide oxygen species for toluene oxidation and subsequently, the consumed oxygen species are replenished by gas phase oxygen, achieving the catalytic reaction cycle.…”