Research progress of modified and optimized AMn2O5 catalyst for efficient degradation of gaseous pollutants

AMn2O5 catalyst has become a popular material in the field of catalytic oxidation as a mixed oxide of manganese group. Its abundant lattice oxygen species and unique crystal structure make the mullite catalyst have excellent catalytic performance. Mn-based mullite catalyst is mainly composed of four different types of catalysts, including A-site complex phase catalyst, nano-catalyst, supported catalyst and 3DOM structure catalyst. They are widely used in the degradation reaction of NO, VOCs, CO and Soot in different phases, and show superior activity. In this paper, intrinsic properties of AMn2O5 catalysts, such as crystal structure, physicochemical properties, active sites and metal-oxygen bond strength, are discussed. The toxicity resistance, water resistance, stability and catalytic activity of AMn2O5 catalyst were analyzed based on the examples of various catalytic oxidation reactions. Finally, the feasibility of expanding the application of Mn-based mullite catalyst in environmentally friendly and sustainable production was summarized and prospected through the current practical catalyst optimization technology. The work in this paper provides a reference for the design and optimization of multiphase Mn-based mullite catalysts.