Controllable positions of Cu2+ to enhance low-temperature SCR activity on novel Cu-Ce-La-SSZ-13 by a simple one-pot method

Abstract

Adjusting the position of active components is critical to enhancing the activity of CHA structured small-pore zeolites for NO selective catalytic reduction. We herein synthesized a novel low-cost multi-metal Cu-Ce-La-SSZ-13 catalyst via a simple one-pot method and revealed the relationship between the position of active species and catalytic activity. The introduction of Ce⁴⁺ ions and La³⁺ ions can effectively regulate the Cu²⁺ cations to migrate from eight-membered rings to more active six-membered rings, which endows Cu-Ce-La-SSZ-13 with excellent low-temperature SCR activity.