To study the promoting effect of strong metal−support interactions (SMSIs) on the catalytic oxidation of ethyl acetate, a series of Pd/CeO 2 catalysts with different CeO 2 support morphologies of nanocubes (NC), spindles (SP), and nanospheres (NS) were prepared for the catalytic oxidation of ethyl acetate. The study indicated that the catalytic activity of Pd/CeO 2 catalysts possessed a significant structure− activity relationship. A series of characterization results revealed that the SMSIs between Pd nanoparticles (NPs) and the CeO 2 support optimized surface chemical states, promoted the formation of surface oxygen vacancies, activated the surface oxygen species, and improved the low-temperature reducibility. Among all of these catalysts, Pd/CeO 2 -SP exhibited the best catalytic activity for ethyl acetate oxidation (T 90 = 180 °C, WHSV = 60 000 mL g −1 h −1 ), which was attributed to the SMSIs between Pd NPs and the CeO 2 -SP support.

No abstract