文献类型：期刊文献

英文题名：Boosting CO2 cycloaddition via poly(ionic liquid)/Al2O3 aerogel composites: a synergistic design of porosity and multiple active sites

作者：Gao, Yinfang Dang, Lulu Li, Qingsong Wan, Ya-Li Lei, Yizhu

第一作者：Gao, Yinfang

通信作者：Lei, YZ[1];Wan, YL[2]

机构：[1]Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China;[2]Liupanshui Normal Univ, Sch Chem & Mat Engn, Liupanshui 553004, Guizhou, Peoples R China;[3]Guizhou Res Inst Coal Mine Design Co Ltd, Guizhou Lab Energy Intelligent Dev & Efficient Uti, Guiyang 550025, Peoples R China;[4]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550025, Peoples R China

第一机构：Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China

通信机构：corresponding author), Dalian Univ, Coll Environm & Chem Engn, Dalian 116622, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550025, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2026

卷号：395

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20261420418056);WOS:【SCI-EXPANDED(收录号:WOS:001735867000001)】；

基金：The National Natural Science Foundation of China (22162017) , the Natural Science Foundation of Guizhou Province (Qiankehejichu-ZK [2024] zhongdian090) , Guizhou Science and Technology Major Project (Qiankehezhongda [2026] 001) , the Program for High-level Innovative Talents in Guizhou Province (GCC [2023] 049, GCC [2023] 102) , the Foundation of Guizhou Institute of Technology (2024XSXM002, 2025GCC014) , the Foundation of Liupanshui Normal University (LPSSY2023KJZDPY01, LPSSYLPY202408) , and the Guizhou Province Science and Technology Innovation Talent Team Construction Project (CXTD [2025] 017) , have kindly provided financial support for this research project.

语种：英文

外文关键词：Composite catalyst; Poly(ionic liquid)s; Aerogel; Synergistic catalysis; Mesoporosity

摘要：Rationally integrating multifunctional active sites and hierarchical porosity into heterogeneous catalysts represents a powerful strategy for boosting performance in target reactions. Herein, we report the successful combination of solid oxide aerogels with poly(ionic liquids) (PILs) to fabricate a series of PIL/solid oxide aerogel composites (PILBr@AA, PILBr@SA, PILBr@SAA). These composites possess synergistic Lewis acid-base functionalities and highly accessible mesopores. Comprehensive structural and catalytic analyses show that the physicochemical properties of the oxide aerogel support play a critical role in regulating the composite's structure and catalytic activity. Consequently, the Al2O3 aerogel-based composite (PILBr@AA) exhibits superior catalytic performance in the epoxide-CO2 cycloaddition compared to pure Al2O3 aerogel (AA) or pristine PILs. Furthermore, it maintains excellent stability over 10 consecutive cycles without co-catalysts or solvents. This superior performance stems from synergistic interactions between multifunctional active sites as well as the mesoporous structure. Specifically, Lewis acid sites (Al3+) and Lewis basic sites of the amphoteric Al2O3 aerogel activate epoxide substrates and facilitate CO2 adsorption. Meanwhile, high-density Br & oline; nucleophiles from PILs promote ring-opening. All these multifunctional active sites are integrated into the mesoporous PILBr@AA composite, which ensures the accessibility of these active sites and enables efficient diffusion of reactants and products. Density functional theory (DFT) calculations further clarify the pivotal role of the Al2O3 aerogel in activating epoxides and stabilizing electron-rich intermediates during the reaction. This work not only demonstrates an efficient and durable solid catalyst applicable to CO2 fixation, but also establishes a versatile design strategy for engineering advanced heterogeneous catalysts by rationally integrating PILs with mesoporous solid oxide aerogels.