Doped-Nd enhanced the performance of FeCoMnCe catalyst on the NOx selective catalytic reduction

Abstract

It is urgently necessary to create low-temperature, high-efficiency denitrification catalysts to convert NOx into industrial waste gas. This paper reveals the incipient wetness impregnation approach to create the FeCoMnCeNd catalyst. The FeCoMnCeNd catalyst showed better H2O resistance and increased low-temperature SCR activity than the FeCoMnCe catalyst. Over 80% of NO is converted by the FeCoMnCeNd catalyst at temperatures between 150 and 300 ℃. The XRD, BET, XPS, H2-TPR and NH3-TPD characterization were performed to explore the catalyst structure and reaction mechanism. It was found that Nd doping formed Ce0.5Nd0.5O1.75, and the configuration entropy increased, which increased the amount of surface chemisorbed oxygen, NH3/NO adsorption, and redox property. Overall, controlling configuration entropy could be an effective strategy for developing SCR catalysts.