论文题目：Recent Advances in Catalytic Confinement Effect within Micro/Meso-Porous Crystalline Material

论文作者：Jingjing Dai, Hongbo Zhang*

发表期刊：Small, 17(22), 2005334, 2021  

Abstract： 

Micro/meso-porous crystalline materials with a well-defined pore  structure, such as zeolites, carbon nanotubes, and metal-organic  frameworks, are of great significance in the development of catalytic  systems for scientific and industrial demands. The confinement effect  aroused by pore features of porous crystalline materials has triggered  great interest in heterogeneous catalysis. Catalytic reactions in  confined spaces exhibit unique behaviors compared to those observed on  bulk materials. More interestingly, chemical reactivity can be modulated  in different ways by the confinement effect, despite the fact that the  mechanism on how the confinement effect changes the reaction remains  unclear. In this review, a systematic discussion and fundamental  understanding is provided concerning the concept of confinement effect,  highlighting the impact of confinement effects on diffusion,  adsorption/desorption, and catalytic reaction in typical  micro/meso-porous crystalline materials, including zeolites, carbon  nanotubes, and metal-organic frameworks. Relevant studies demonstrate  that confinement effect affords not only shape selectivity against  reactants/products, but also modulates surface electron distribution of  active species confined within porous environments, thereby successively  affecting the catalytic reactivity, selectivity, and stability. This  review provides a useful guide for researchers attempting to design  excellent porous crystalline catalysts based on the concept of  confinement effect in heterogeneous catalysis.