摘要：Understanding the influence of HCl on the NH_(3)-selective catalytic reduction reaction mechanism is crucial for designing highly efficient denitrification *** formation of chlorate species on the surface of the synthesized SbCeO_(x)catalyst,induced by HCl,significantly enhances low-temperature activity,as evidenced by a 30%increase in NO co.version at 155℃.Furthermore,it improves N_(2)selectivity at high temperatures,with a notable 17%increase observed at 405℃.Both experimental results and density functional theory calculations co.firm that chlorate species form at Ce *** formation facilitates the creation of oxygen vacancies,boosting the oxygen exchange *** also increases NH_(3)adsorption at the Ce sites,promotes the formation of Sb-OH,and reduces co.petitive OH adsorption on these ***,co.pared with the reaction mechanism without HCl,the presence of chlorate species enhances NH_(3)adsorption and activation,which is vital for subsequent catalytic reactions.