文献类型：期刊文献

英文题名：Redox-Activated Supersaturation of Ceria Solid Solution as a Dynamic Catalyst Enabling Low-Temperature Ethylbenzene Oxidative Dehydrogenation

作者：Zhang, Juping[1]; Gao, Wenpei[4]; Yang, Kunran[3]; Liu, Junchen[3]; Zheng, Yanping[5]; Yang, Kun[4]; Zhang, Chao[4]; Li, Kongzhai[1]; Zhao, Kun[6]; Wang, Hua[1]; Gao, Yunfei[2]; Zhu, Xing[1]

机构：[1] State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China; [2] School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27606, United States; [4] School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai, 200240, China; [5] School of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China; [6] Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China

年份：2025

卷号：15

期号：2

起止页码：956

外文期刊名：ACS Catalysis

收录：EI(收录号：20250417733619)

语种：英文

外文关键词：Catalysis - Cerium oxide - Crystal lattices - Manganese alloys - Manganese compounds - Redox reactions - Supersaturation

摘要：Dynamic structural changes in the reactive environment often lead to catalyst deactivation in the thermal-catalysis field. Taking advantage of the dynamic changes in bulk phases, interfaces, and surface structures to design highly active catalysts is a unique but important strategy. Herein, we report a supersaturated ceria solid solution catalyst enabling a styrene yield of 91.8% over extended redox cycles at 430 °C in the redox oxidative dehydrogenation (ODH) of ethylbenzene. In-situ characterizations reveal that the oxygen anions (O2-) and transition-metal cations (Fe and Mn) reversibly shuttle through a ceria solid solution (bulk ? surface) in a K-Ce0.47Fe0.2Mn0.33O2?δ catalyst during the redox ODH process. The ceria solid solution acts as a dynamic transition-metal cations/oxygen reservoir, creating atomic interfaces of K-Fe-O/K-Mn-O and an oxygen gateway for efficient ethylbenzene ODH. The findings concerning the formation of a supersaturated ceria solid solution and cations, lattice oxygen migration, and the coupling between oxygen donation and catalytic reactions offer new strategies for designing high-performance dynamic catalysts. ? 2024 American Chemical Society.