文献类型：期刊文献

英文题名：Palladium nanoparticles embedded polyimide derived carbon nanofibers for Suzuki reactions

作者：Huang, Xudong[1];Chen, Haifeng[2];Shi, Zhengjun[2];Xing, Guiying[3];Shao, Linjun[1];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China;[2]Zhejiang Zhongxin Fluoride Mat Co Ltd, Shaoxing 312000, Zhejiang, Peoples R China;[3]Shaoxing Univ, Sch Med, Shaoxing 312000, Zhejiang, Peoples R China

年份：2024

卷号：188

外文期刊名：JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS

收录：SCI-EXPANDED(收录号：WOS:001179571400001)、、EI(收录号：20240715539578)、Scopus(收录号：2-s2.0-85184516776)、WOS

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 11905132 and 11975157) .

语种：英文

外文关键词：Carbon fiber; Palladium; Carbonization; Polyimide; Suzuki reaction

外文摘要：Supported palladium catalysts have garnered much interest in the modern chemical industry due to their high catalytic activity and excellent recyclability. Carbon nanofibers are outstanding supports for palladium species because of their large surface areas and chemically inert properties. Herein, with poly(vinylpyrrolidone) as the co -spinning agent, palladium cation embedded polyimide nanofibers were first prepared by electrospinning and thermal imidization. Then, these composite nanofibers were carbonized to prepare palladium embedded nitrogen doped carbon nanofibers. It was found that raising the carbonization temperature could reduce the fiber diameter and increase the size of micropores in the fiber. Meanwhile, the Pd2+ cations in the nanofibers were reduced to Pd0 nanoparticles and their sizes grew with the increase of carbonization temperature. The palladium nanoparticles were partially or totally embedded inside the carbon nanofibers. Suzuki reaction catalysis results show that these palladium embedded carbon nanofibers could effectively catalyze the Suzuki reactions of aromatic iodides and bromides with phenylboronic acid to afford the biaryl products with excellent yields. Moreover, this fibrous catalyst can be readily recovered by filtration and reused for 5 times with little loss of initial activity. The remarkable catalytic efficiency and stability of this novel palladium embedded carbon nanofibers could be attributed to the embedment of palladium nanoparticles and chelation of doped nitrogen atoms in the carbon fibers.