ABSTRACT

Two-dimensional (2D) zeolites with modifiable structures, can possess great advantages in catalysis compared to three-dimensional (3D) rigid ones. Three kinds of 2D zeolites, including traditional lamellar ones, 2D zeolites induced by oriented growth with specially designed structural-directing agents, and 2D intermediates derived from germanosilicates, are covered in this review. 2D zeolites derived catalysts with higher surface area, larger pore size or hierarchical pore system release the diffusion constrains and enhance the accessibility of active sites, but they may also exhibit different microenvironments to the traditional 3D zeolites. The present review focuses on the complex relationship among pore architectures, location of active sites and the catalytic properties by comparing the 2D zeolite catalysts to 3D ones in the reactions catalyzed by framework Al or other heteroatoms (Ti and Sn), such as alkylation, selective oxidation and isomerization reactions. Last but not least, the challenges for future progress on both the preparation and application of these 2D zeolite catalysts are addressed.

摘要

与三维 (3D) 刚性沸石相比，具有可修改结构的二维 (2D) 沸石在催化方面具有很大的优势。这篇综述涵盖了三种二维沸石，包括传统的层状沸石、通过特殊设计的结构导向剂定向生长诱导的二维沸石和源自锗硅酸盐的二维中间体。具有更高表面积、更大孔径或分级孔隙系统的 2D 沸石衍生催化剂释放了扩散约束并增强了活性位点的可及性，但它们也可能表现出与传统 3D 沸石不同的微环境。本综述重点关注孔隙结构之间的复杂关系，通过将 2D 沸石催化剂与 3D 沸石催化剂在由骨架铝或其他杂原子（Ti 和 Sn）催化的反应（如烷基化、选择性氧化和异构化反应）中的活性位点的位置和催化性能进行比较。最后但并非最不重要的一点是，解决了这些二维沸石催化剂的制备和应用未来进展的挑战。