Cocrystallized Zeolite Interface Boosting the Hydrothermal Stability of Cu-CHA/OFF-ERI Catalysts

作者：Jinfeng Han, Junyan Li, Yang Bai, Yingzhen Wei, Dan Li, Wenfu Yan, Jihong Yu · 发表于：CCS Chemistry · 年份：2024 · DOI：10.31635/ccschem.024.202404558 · 被引用次数：23 · 研究领域：Catalytic Processes in Materials Science、Nanomaterials for catalytic reactions、Ammonia Synthesis and Nitrogen Reduction

Open AccessCCS ChemistryRESEARCH ARTICLES29 Jul 2024Cocrystallized zeolite interface boosting the hydrothermal stability of Cu-CHA/OFF-ERI catalysts Jinfeng Han, Junyan Li, Yang Bai, Yingzhen Wei, Dan Li, Wenfu Yan and Jihong Yu Jinfeng Han , Junyan Li , Yang Bai , Yingzhen Wei , Dan Li , Wenfu Yan and Jihong Yu Cite this: CCS Chemistry. 2024;0:1–24https://doi.org/10.31635/ccschem.024.202404558 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareFacebookTwitterLinked InEmail Cu-based Al-rich zeolite catalysts (e.g., Cu-SSZ-13, CHA) exhibit excellent catalytic activity in the ammonia selective catalytic reduction of nitrogen oxides (NH3-SCR), particularly at low temperature, but their application is hindered by inferior hydrothermal stability. In this study, CHA/OFF-ERI zeolites with cocrystallized interfaces between small CHA zeolite crystals and OFF-ERI intergrowth zeolite rods were synthesized, which demonstrated superior hydrothermal stability compared to Cu-SSZ-13, Cu- OFF-ERI, and a physical mixture of Cu-SSZ-13 and Cu- OFF-ERI (denoted as Cu-Mixture). Studies on the evolution of the crystallinity and Brønsted acid sites of Cu- CHA/OFF-ERI, Cu-SSZ-13, Cu- OFF-ERI, and Cu-Mixture before and after hydrothermal ageing suggested that the cocrystallized interfaces accounted for the enhanced hydrothermal stability of Cu- CHA/OFF-ERI zeolite. During hydrothermal ageing, the cocrystallized interfaces locked the Al(OH)3 species detach...