文献类型：期刊文献

英文题名：Stabilization of palladium nanoparticles inside chitosan derived N-doped carbon nanofibers for Heck reaction

作者：Gao, Danning[1];Zhang, Qi[1];Liu, Zhifeng[1];Zhang, Fureng[1];Gou, Faliang[1];Xing, Guiying[1];Zhou, Shujing[2];Shao, Linjun[1];Li, Jinjing[2];Du, Yijun[1];Qi, Chenze[1,2]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China;[2]Jiamusi Univ, Sch Pharm, Jiamusi, Peoples R China

年份：2022

卷号：139

期号：10

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000703524300001)、、EI(收录号：20214010987991)、Scopus(收录号：2-s2.0-85116338673)、WOS

基金：National Natural Science Foundation of China, Grant/Award Numbers: 11905132, 12075154

语种：英文

外文关键词：catalysts; biopolymers and renewable polymers; electrospinning; fibers

外文摘要：We report the synthesis of palladium nanoparticles encapsulated N-doped carbon nanofibers derived from environmentally benign chitosan. Palladium salt was incorporated into the chitosan/sodium polyacrylate composite nanofibers by electrospinning, followed by carbonization under argon atmosphere to prepare palladium encapsulated mesoporous carbon nanofibers (Pd@Carbon). SEM images shows that the fibrous structures were well retained after carbonization processes. The Raman spectra demonstrates that the ratio of graphite carbon were increased with the carbonization temperature. X-ray powder diffraction and transmission electron microscopy analysis shows that PdO and Pd nanoparticles were formed in the carbon fibers and their sizes grew with the carbonization temperature. The sizes and concentrations of submicroscopic pores inside the nanofibers were analyzed by nitrogen adsorption/desorption experiments and positron annihilation lifetime spectra. Heck reaction catalysis result shows that high carbonization temperature could improve the catalytic activity of Pd@Carbon nanofibers and the nanofibers carbonized at 800 degrees C had the highest catalytic activity. Moreover, the catalytic activity of these novel composite nanofibers was well retained even after recycling for 13 times. The excellent catalytic performance of this fibrous palladium catalyst can be attributed to the N-rich carbon nanofibers and encapsulation of palladium active species inside the ultrathin mesoporous carbon fibers.