Tuning the selectivity of NH₃ oxidation via cooperative electronic interactions between platinum and copper sites.

ABSTRACT: Selective catalytic oxidation (SCO) of NH₃ to N₂ is one of the most effective methods used to eliminate NH₃ emissions. However, achieving high conversion over a wide operating temperature range while avoiding over-oxidation to NO_x remains a significant challenge. Here, we report a bi-metallic surficial catalyst (Pt_SCuO/Al₂O₃) with improved Pt atom efficiency that overcomes the limitations of current catalysts. It achieves full NH₃ conversion at 250 °C with a weight hourly space velocity of 600 ml NH₃·h^-1·g^-1, which is 50 °C lower than commercial Pt/Al₂O₃, and maintains high N₂ selectivity through a wide temperature window. Operando XAFS s

SUBMITTER: Chen L 

PROVIDER: S-EPMC11697224 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature