Insight into the synergism between MnO₂ and acid sites over Mn-SiO₂@TiO₂ nano-cups for low-temperature selective catalytic reduction of NO with NH₃.

ABSTRACT: The rational synthesis of low-temperature catalysts with high catalytic activity and stability is highly desirable for the selective catalytic reduction of NO with NH₃. Here we synthesized a Mn-SiO₂/TiO₂ nano-cup catalyst via the coating of the mesoporous TiO₂ layers on SiO₂ spheres and subsequent inlay of MnO₂ nanoparticles in the narrow annulus. This catalyst exhibited superior catalytic SCR activities and stability for low-temperature selective catalytic reduction of NO with NH₃, with NO conversion of ∼100%, N₂ selectivity above 90% at a temperature ∼140 °C. The characterization results, such as BET, XRD, H₂-TPR, O₂/NH₃-TPD and XPS, indicated that this nano-cup

SUBMITTER: Zheng S 

PROVIDER: S-EPMC9077400 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature