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• W3145393469 abstract "Herein, we report the excellent De-NO x performance of La 0.7 Sr 0.3 MnO 3 (LSM) perovskite-supported Pd catalysts (Pd-LSM) in alternating lean-burn/fuel-rich atmospheres using C 3 H 6 as reductant and describe the in situ activation of the Pd catalysts via metal-support interaction (MSI) tuning. The NO x reduction conversion of the Pd-LSM catalyst increased significantly from 56.1% to 90.1% and the production of N 2 O was suppressed. Our results demonstrated that this behavior was mainly attributed to the in situ transformation of Pd 2+ into Pd 0 during the reaction. The generated Pd 0 species could readily activate the C 3 H 6 reductant and achieve an eight-fold higher turnover frequency than Pd 2+ for the reduction of NO x . Moreover, excessive MSIs inhibited the in situ generation of Pd 0 , and thereby, lowered the De-NO x activity of the catalyst even at high Pd dispersion. In addition, the Pd-LSM catalysts exhibited much higher S tolerance than conventional Al 2 O 3 -supported catalysts. Our study provides a new approach for analyzing and designing highly active metal catalysts operated under dynamic alternating oxidizing/reducing atmospheric conditions. A perovskite-supported Pd catalyst was in situ activated to generate Pd 0 species under dynamic alternating oxidizing/reducing atmospheric conditions via tuning the metal-support interactions. The De-NO x activity of the generated Pd 0 species was eight fold higher than that of the Pd 2+ species." @default.
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• W3145393469 date "2021-05-01" @default.
• W3145393469 modified "2023-10-14" @default.
• W3145393469 title "Promoting NO reduction via in situ activation of perovskite supported Pd catalysts under alternating lean-burn/fuel-rich operating atmospheres" @default.
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• W3145393469 doi "https://doi.org/10.1016/s1872-2067(20)63694-4" @default.
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