Photoassisted selective catalytic reduction of NO with ammonia in the presence of oxygen at low temperature

Abstract

Rb-ion-modified V₂O₅/SiO₂ (Rb-VS) was found to be an effective catalyst for photoassisted selective catalytic reduction (SCR) of NO with NH₃ in the presence of oxygen at room temp erature. V₂O₅/SiO₂ and SiO₂ did not promote the reaction either in the dark or with irradiation. The reaction mechanism over irradiated Rb-VS is different from the conventional NO SCR with ammonia. NO _x is firstly adsorbed over irradiated Rb-VS in the presence of O₂, followed by adsorption of NH₃.