New Insights into the Mechanism of Selective Catalytic Reduction (SCR) of NO By Supported V2O5 – WO3/TiO2 Catalysts

Coprecipitated 1%V₂O₅-5%WO₃/TiO₂ catalysts were compared with analogs prepared by incipient wetness for SCR of NO by NH₃.  Both NH₄⁺* and NH₃* species chemisorbed on Brønsted and Lewis acid sites respectively react. For the first time, a deuterium kinetic isotope effect is observed for SCR with NH₃ vs ND₃.