Abstract
In this paper, we prepared Pt/BaTiO3-x catalyst through modified the surface of BaTiO3 perovskite by NaOH aqueous solution and loaded Pt by incipient wetness impregnation method. A series of characterization techniques including XRD, BET and in situ IR was conducted to investigate the physical and chemical properties. We found that NOx storage capacity of the catalyst was significantly improved as the sample was washed in alkali for 2 h, meanwhile NOx conversion was optimal. The surface of the catalyst was modified by alkali washing process, and then Pt was loaded. Further calcination could enhance the interaction between Pt and Ba, which facilitate the formation of a reactive nitrite species during the adsorption process, thus increasing NOx storage reduction (NSR) activity.
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