Precise modulation the coordination microenvironment and the phase of MnO2 for superior toluene catalytic property

Doping engineering plays a crucial role in the regulation of Mn-based catalysts. Herein, Cu–MnO 2 and Co–MnO 2 were obtained by simple doping engineering for toluene elimination. The synergistic regulation of crystal phase and coordination microenvironment of MnO 2 is successfully induced for the superior catalytic activity of Cu–MnO 2 . The results of characterizations showed that the crystal phase of β-MnO 2 transformed to ε-MnO 2 and (ε+α)-MnO 2 after introduction of Cu and Co, respectively. The lattice rearrangement of MnO 2 generated more oxygen vacancies and reactive oxygen species. Moreover, the precise modulation of MnO 2 's electronic structure induced abundant M-O V -Mn 3+ (M = Cu and Co) active complex sites, which further enhance other physicochemical properties such as Mn 3+ /Mn 4+ and O ads /O latt of MnO 2 catalysts. This work highlights the driving effect of doping engineering on the phase transformation and electronic microstructure improvement of MnO 2 , providing new enlightenment for the exploitation and precise regulation of Mn-based catalysts.