文献类型：期刊文献

英文题名：Palladium supported on carbon nanotube modified nickel foam as a structured catalyst for polystyrene hydrogenation

作者：Feng, Miao[1];Luo, Zhao-Hui[1];Chen, Rong-Qi[1];Yi, Shan[1];Lu, Hui[1];Cao, Gui-Ping[1];Lu, Chong[2];Feng, Shao-Yue[2];Li, Chen-Yang[1]

机构：[1]East China Univ Sci & Technol, UNILAB, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：570

起止页码：329

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20184906216293);WOS:【SCI-EXPANDED(收录号:WOS:000457661500035)】；

基金：We gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (21576091), the Nongovernmental International Science and Technology Cooperation Program (10520706000) from the Science and Technology Commission of Shanghai Municipality, the State Key Laboratory of Chemical Engineering open fund (SKL-ChE-09C07), and National University Student Innovation Program (201710251007 and x17009).

语种：英文

外文关键词：Structured carbon nanotubes; Polystyrene hydrogenation; Masstransfer

摘要：A structured support of carbon nanotubes modified nickel foam (CNTs@NF) was synthesized through a facile method of chemical vapor deposition. The entangled CNTs layer with open pores and the dense carbon layer beneath covered around the skeleton of nickel foam establishes a hybrid hierarchical structure with large effective surface area which dramatically promotes the internal diffusion of large polystyrene (PS) coils. Palladium was chosen as the catalyst for PS hydrogenation and deposited on the CNTs@NF support in the form of nano particles. Characterization analysis including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermo gravimetric analysis (TGA), Raman spectrum and N-2 physisorption were conducted to investigate the morphology and structure of the resulting Pd supported on CNTs@NF catalysts (Pd/CNTs@NF). The macroscopic structured Pd/CNTs@NF catalyst was applied to PS hydrogenation and displayed a quite excellent hydrogenation activity with a final hydrogenation degree (HD) of 73.6%, almost 8 times higher than nickel foam supported Pd catalyst (Pd/NF) and remarkably similar to powdered CNTs supported Pd catalyst (Pd/CNTs) under the identical condition. Moreover, the turn-over-frequency (TOF) of Pd/CNTs@NF (0.041 s(-1)) was also comparable to Pd/CNTs (0.056 s(-1)), which confirmed a similar intrinsic catalytic activity of Pd on both supports. Inspiringly, the performance of Pd/CNTs@NF catalyst was comparable to powdered Pd/CNTs catalyst with the merit of eliminating filtration operation. It has revealed the structured Pd/CNTs@NF catalyst with outstanding recyclability could be an attractive alternative to the powdered Pd/CNTs catalyst for heterogeneously catalyzed polymers hydrogenation reactions.