文献类型：期刊文献

英文题名：Carbon nanofiber-supported palladium nanoparticles as potential recyclable catalysts for the Heck reaction

作者：Zhu, Jun[2];Zhou, Jinghong[2];Zhao, Tiejun[1];Zhou, Xinggui[2];Chen, De[1];Yuan, Weikang[2]

机构：[1]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway;[2]E China Univ Chem Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：352

期号：1-2

起止页码：243

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20085111791855);WOS:【SCI-EXPANDED(收录号:WOS:000262657300029)】；

基金：This work was supported by NSFC (No. 20776041, 20490200 and 20476026), the Creative Team Development Project of Ministry of Education of China (IRT0721), the "111" Project of China (1308021), and strategy materials, Norwegian University of Science and Technology, Norway.

语种：英文

外文关键词：Palladium; Carbon nanofiber; Heterogeneous catalysis; Heck coupling reactions

摘要：5 wt% Pd catalysts supported on platelet carbon nanofibers has been prepared by incipient wetness impregnation. Both the calcination and the reduction temperature have a significant effect on the dispersion of palladium and it was found that about 3 nm sized Pd nanoparticles can be obtained at a calcination and reduction temperature of 250 degrees C and 150 degrees C, respectively. Pd catalysts have been applied to catalyze Heck reactions of various activated and non-activated aryl substrates. The activity increased exponentially with a decrease in Pd particle size. The high surface area, mesoporous structure of carbon nanofiber and highly dispersed palladium species on carbon nanofibers makes up one of the most active and reusable heterogeneous catalysts for Heck coupling reactions. Pd nanoparticles supported on platelet CNFs appear to be an excellent catalyst due to high activity, low sensitivity towards oxygen, almost no or low issues with leaching and high stability in multi-cycles. (C) 2008 Elsevier B.V. All rights reserved.