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影响因子：6.8

DOI码：10.1007/s40843-020-1438-9

所属单位：东北林业大学

发表刊物：Science China Materials

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 catalyst. The CNF matrix was composed of CNF-assembled mesoporous nanosheets and appeared as soft and hydrophilic foam. Ultrafine 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 reactants. Consequently, 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 activity. Moreover, chemoselective reduction of 3 nitrostyrene was achieved with high yield (80%–98%) of 3-aminostyrene in alcohol/water cosolvent. Overall, this work demonstrates a positive nanoconfinement effect of CNFs for developing stable and recyclable metal NP catalysts.

合写作者：Xiaochao Shi,Wenshuai Chen

第一作者：Juan Meng,Yongzhuang Liu

论文类型：期刊论文

通讯作者：Xianquan Zhang,Haipeng Yu

文献类型：J

卷号：64

页面范围：621-630

是否译文：否

发表时间：2020-01-01

收录刊物：SCI

发布期刊链接：https://link.springer.com/article/10.1007/s40843-020-1438-9