文章基本信息

标题：Developing a thermally stable Co/Ce-Sn catalyst via adding Sn for soot and CO oxidation
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作者：Meng Wang ; Yan Zhang ; Wenpo Shan 等
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2022
卷号：25
期号：4
页码：1-11
DOI：10.1016/j.isci.2022.104103
语种：English
出版社：Elsevier
摘要：SummaryThe thermal stability of the catalysts is of particular importance but still a big challenge for working under harsh conditions at high temperature. In this study, we report a strategy to improve the thermal stability of the ceria-based catalyst via introducing Sn. XRD, Rietveld refinement, and other characterizations results indicated that the formation of Sn-Co solid solution plays a key role in the thermal stability of the catalyst. The developed ternary 3%Co/Ce0.5Sn0.5O2catalyst not only exhibits outstanding thermal stability and resistance to SO2and H2O for soot oxidation from diesel vehicle exhaust but also remains extraordinary thermal stability for CO oxidation. Remarkably, even after thermal aging at 1000°C, it still possessed high catalytic activity similar to that of the fresh catalyst.Graphical abstractDisplay OmittedHighlights•The developed 3%Co/Ce-Sn catalyst processes extraordinary thermal stability•The Sn species could restrain the aggregation of Co active component•The Sn-Co solid solution plays a key role in improving the thermal stability•The 3%Co/Ce-Sn catalyst exhibited perfect and stable resistance to H2O and SO2Chemistry; Catalysis; Thermal property; Materials characterization