Atomically precise Pd_(8)nanocluster encapsulated in a hierarchically engineered nanoreactor towards enhanced catalysis  

作　　者：Hui Yang Yi-Ming Li Jinhui Hu Dongxia Shi Yongkang Ge Jiwei Feng Hongting Sheng Manzhou Zhu 

机构地区：[1]Department of Chemistry and Centre for Atomic Engineering of Advanced Materials,Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials,Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education,Anhui University,Hefei 230601,China [2]School of Chemistry and Materials Engineering,Anhui Provincial Key Laboratory of Green Carbon Chemistry,Fuyang Normal University,Fuyang 236041,China

出　　处：《Nano Research》2025年第3期187-193,共7页纳米研究(英文版)

基　　金：financial support by the National Natural Science Foundation of China(Nos.22305003 and 21972001);the China Postdoctoral Science Foundation(No.2023M740009).

摘　　要：Metal-organic frameworks(MOFs)have emerged as superior hosting matrices for atomically precise nanoclusters(NCs)encapsulation,offering excellent physical and chemical protections for advanced catalysis.Nevertheless,the MOF coating significantly reduces the NC catalytic efficiency due to the diffusion barriers and the confined microenvironments.Herein,a hierarchically engineered MOF nanoreactor was constructed by controlled structural etching for NC immobilization.This nanoreactor possesses hierarchical pores to accelerate the diffusion rate of reactants and creates hollow structures to unleash the confined NC molecules from the rigid MOF network to a capacious microenvironment.The enhanced mass transfer,improved freedom of NCs,and outstanding stability collectively boosted the catalytic activity of the nanoreactor.By controlling the etching time,freestanding Pd8@zeolitic imidazolate framework-8(ZIF-8)-TA10 displayed a catalytic efficiency that was 3.17 times greater than that of the initial confined Pd8@ZIF-8 and even better than free Pd8.This work opens a new strategy to reduce the inherent limitations of porous matrixes for developing high-performance catalysts.

关 键 词：metal nanoclusters metal-organic frameworks zeolitic imidazolate framework-8(ZIF-8) hierarchical pores NANOREACTOR 

分 类 号：O64[理学—物理化学]