制备方法对Co改性Ce/TiO2催化剂NH3-SCR脱硝性能的影响OA

This study systematically conducted preparation optimization and performance investigations on Co-modified Ce/TiO2 catalysts,with a focus on examining how preparation methods and Co loading regulate the catalyst's low-temperature denitrification activity.After identifying optimal preparation parameters via condition screening,multiple characterization techniques-including BET,XRD,XPS,H2-TPR and in situ DRIFTS-were employed to deeply analyze the catalyst's physicochemical properties and reaction mechanism.Results demonstrated that compared to the impregnation and co-precipitation methods,the Ce-Co0.025/TiO2-SG catalyst(prepared by the sol-gel method with a Co/Ti mass ratio of 0.025)exhibited significantly superior denitrification activity:NO conversion remained stably above 95％in the 225-350℃ temperature range,and it displayed high N2 selectivity.Characterization analysis revealed that abundant surface oxygen vacancies,a high proportion of Ce3+species,and prominent acidic sites collectively contributed to enhancing its low-temperature denitrification performance.This work provides reference value for the development of highly efficient low-temperature denitrification catalysts.