Recyclable nanocellulose-confined palladium nanoparticles with enhanced room-temperature catalytic activity and chemoselectivity

作     者：Juan Meng Yongzhuang Liu Xiaochao Shi Wenshuai Chen Xianquan Zhang Haipeng Yu 孟娟;刘永壮;史晓超;陈文帅;张显权;于海鹏

作者机构：Key Laboratory of Bio-based Material Science and Technology of Ministry of EducationNortheast Forestry UniversityHarbin150040China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2021年第64卷第3期

页      面：621-630页

核心收录：

学科分类：081705[工学-工业催化] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(31925028 and 31670583) the Special Project for Double First-Class-Cultivation of Innovative Talents(000/41113102) 

主　　题：nanocellulose deep eutectic solvents palladium nanoparticles catalysts nano-confinement 

摘      要：We describe the synthesis of even-dispersed palladium nanoparticles(Pd NPs)confined within a cellulose nanofiber(CNF)matrix for developing a high-performance and recyclable *** CNF matrix was composed of CNF-assembled mesoporous nanosheets and appeared as soft and hydrophilic *** Pd NPs(∼6 nm)with high-loading(9.6 wt%)were in situ grown on these mesoporous nanosheets,and their dense spatial distributions were likely to generate nano-confinement catalytic effects on the ***,the CNF-confined Pd NPs(CNF-Pd)exhibited an enhanced room-temperature catalytic activity on the model reaction of 4-nitrophenol hydrogenation with a highest rate constant of 8.8×10^−3 s^−1 and turnover frequency of 2640 h The CNF Pd catalyst possessed good chemical stability and recyclability in aqueous media which could be reused for at least six cycles without losing ***,chemoselective reduction of 3 nitrostyrene was achieved with high yield(80%–98%)of 3-aminostyrene in alcohol/water ***,this work demonstrates a positive nanoconfinement effect of CNFs for developing stable and recyclable metal NP catalysts.