文献类型：期刊文献

英文题名：Rational co-introduction of K-Ce ions into OMS-2 tunnels to promote oxygen vacancies and Br?nsted acid sites for enhanced NH3-SCO

作者：Hong, Wei[1] Zhu, Tianle[2] Liu, Yang[2] Zeng, Fangang[3] Sun, Ye[4] Wang, Haining[4] Fu, Zongying[1] Lu, Yun[1]

第一作者：Hong, Wei

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China; [2] School of Materials Science and Engineering, Beihang University, Beijing, 100191, China; [3] School of Chemistry and Life Resource of Renmin University of China, Beijing, 100872, China; [4] School of Energy and Power Engineering, Beihang University, Beijing, 100191, China

年份：2025

卷号：372

外文期刊名：Applied Catalysis B: Environmental

收录：EI(收录号：20251418158417);Scopus(收录号：2-s2.0-105001426495)

语种：英文

外文关键词：Cerium oxide - Doping (additives) - Manganese alloys

摘要：Mn-based catalysts hold significant promise for practical applications in NH3-SCO; however, improving NH3 conversion and N2 selectivity at low temperatures (3-SCO. Characterization and DFT calculations revealed that the co-introduction of K-Ce ions into the OMS-2 tunnels facilitated the formation of oxygen vacancies and Br?nsted acid sites, enhancing NH3 adsorption on the catalyst surface. Further analysis showed that this co-doping strategy also increased the catalyst's specific surface area, reducibility, and surface acidity. As a result, the K-Ce-OMS-2 catalyst, with K and Ce contents of 6.46 % and 11.76 %, respectively, exhibited excellent NH3 conversion and N2 selectivity in NH3-SCO. Additionally, a possible NH3-SCO mechanism elucidating the roles of oxygen vacancies and Br?nsted acid sites in promoting NH3 conversion and N2 selectivity over the K-Ce-OMS-2 catalyst was proposed. ? 2025