Superior low temperature activity over α-MnO₂/β-MnOOH catalyst for selective catalytic reduction of NO _<i>x</i> with ammonia.

ABSTRACT: Manganese octahedral molecular sieves with an α-MnO₂ crystal structure (OMS-2) and their related materials have attracted significant attention for the selective catalytic reduction of NO _x using NH₃ (NH₃-SCR) at low temperatures. Further lowering their operating temperature should be an effective method to develop an environmentally friendly de-NO _x system; however, their catalytic activity at low temperatures, especially below 100 °C, remains poor. This study describes a post-synthetic approach to develop Mn-based catalysts superior to those in the literature that operate at ultralow temperatures. Post-synthetic planetary ball milling for OMS-2 caused the partial conversion of OMS-2 into β-MnOOH. The obtained nanocompos

SUBMITTER: Takemoto M 

PROVIDER: S-EPMC11539617 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature