文献类型：期刊文献

英文题名：Understanding enhancement of strong Copper-Yttrium interactions on catalytic properties of Cu/Y-SSZ-13 for NH3-SCR

作者：Kang, Na[1,2];Wang, Yan[1];Chen, Zhi Wen[3];Tang, Xuan[4,5];Wang, Yuanjiang[1];Ding, Zhiyong[1];Zhang, Cheng[1];Dai, Sheng[4,5];Singh, Chandra Veer[1,3];Xie, Pengfei[1,2];Yan, Mi[1,6]

机构：[1]Baotou Res Inst Rare Earths, State Key Lab Baiyunobo Rare Earth Resource Res &, Baotou 014030, Peoples R China;[2]Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China;[3]Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S3E4, Canada;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai 200237, Peoples R China;[6]Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

年份：2023

卷号：475

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20233914792717);WOS:【SCI-EXPANDED(收录号:WOS:001082067700001)】；

基金：This work is supported by Independent Project of National Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization (Grant No. BFXT-2022-D-0043) , Science and Technology Projects of China Northern Rare Earth (Group) , High-tech Co., Ltd. (Grant No. BFXT-2022-D-0023) National Natural Science Foundation of China (22278365) , National Key Research and Development Program of China (2022YFE0128600) , Natural Science Foundation of Zhejiang Province (LR22B060002) , the grant from Shanxi-Zheda Institue of Advanced Materials and Chemical Engineering (2021ST-AT-002) .

语种：英文

外文关键词：Cu/Y-x-SSZ-13; In situ Y doping; Strong copper-yttrium interactions; Low-temperature activity; Hydrothermal stability

摘要：Cu-SSZ-13 represents one of the most promising catalysts for selective catalytic reduction of NOx with ammonia (NH3-SCR), but it has remained challenging to gain superior low-temperature activity and hydrothermal stability for meeting the stringent emission regulations. Here, Cu/Y-x-SSZ-13 have been prepared by in situ doping of Y and subsequent ion-exchanging with Cu ions. The combined analysis of various energy spectra techniques unveils that Y ions are mainly located in the six-membered rings (6MRs) of chabazite framework and have a strong interaction with Cu cations in 8MRs, resulting in the remarkable low-temperature NOx abatement efficiency and hydrothermal stability. Mechanism studies reveal that the interplay between Y and Cu not only enhances the electron transfer from Cu to Y ions that favors the ammonia solvation process and reduces the reaction barrier, but also inhibits the aggregation of Cu sites. This work paves the way for next generation of advanced NH3-SCR catalysts.