Non-thermal plasma synthesis of supported Cu-Mn-Ce mixed oxide catalyst towards highly improved catalytic performance for volatile organic compound oxidation

Regulating the Redox Cycle of Highly Dispersed CuMn2O4 on SiO2 for Toluene Catalytic Combustion

“…48−50 Two Jahn−Teller ions, Mn 3+ and Cu 2+ , also contribute to the formation of solid-state charge transfer redox system in spinel structures. 51 The presence of a strong interaction between the Cu and Mn redox cycle significantly improves the redox capacity. In addition, the lower calcination temperature is helpful in generating more Mn 4+ and Cu + species on the surface of CuMn 2 O 4 /SiO 2 -T catalysts, 37 which suggests the formation of more oxygen vacancies in spinel structures and promotes oxygen storage and oxygen migration behaviors.…”

“…With the increase of the calcination temperature, the adsorbed oxygen content on the surface decreases, and the presence of reactants on the surface of the catalyst is impeded, hindering the subsequent reaction . Interestingly, combined with the changes in valence states of Cu and Mn species in Figure d, it can be found that there is a linear relationship between the content of Mn 4+ and the content of Cu + , which means that there is a Cu 2+ + Mn 3+ ↔ Cu + + Mn 4+ redox cycle in the CuMn 2 O 4 /SiO 2 -T catalysts. − Two Jahn–Teller ions, Mn 3+ and Cu 2+ , also contribute to the formation of solid-state charge transfer redox system in spinel structures . The presence of a strong interaction between the Cu and Mn redox cycle significantly improves the redox capacity.…”