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- W4200480650 abstract "This work presents a novel and highly efficient NH3-SCR catalyst, Sm-modified CoCeTiOx, synthesized by a simple one-step sol-gel method. The optimum Sm0.03Co0.02Ce0.05Ti0.9Ox catalyst with a high BET surface area shows more than 90% NO conversion and nearly 100 % N2 selectivity at 180-440 °C. We investigated the relationship between Sm content and surface reactivity using NH3-TPD, H2-TPR, XPS, and in-situ DRIFTS. It demonstrated that the Sm-doping could precisely regulate the acidity and redox ability of the SmaCo0.05-aCe0.05Ti0.9Ox catalyst. Sm helped develop paths for fast electron transport, in which a charge transfer bridge was built between the Ce and Co, largely favoring the redox cycle. The nature of the acid sites, NOx adsorption, and the reactivity of surface adsorption species was characterized via in-situ DRIFTS. Moreover, the addition of Sm weakened the adsorption capacity of SO2 on the catalyst surface. We found that the electron transfer between SO2 and the activity sites was hindered on the modified catalyst." @default.
- W4200480650 created "2021-12-31" @default.
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- W4200480650 date "2022-04-01" @default.
- W4200480650 modified "2023-10-10" @default.
- W4200480650 title "Selective catalytic reductive removal of NOx with decreased interference from SO2 and H2O by use of Sm-modified SmxCo0.05-xCe0.05Ti0.9Oy catalysts" @default.
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- W4200480650 doi "https://doi.org/10.1016/j.jcis.2021.12.008" @default.
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