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Facile Fabrication of Platinum Nanoparticles Supported on Nitrogen-doped Carbon Nanotubes and Their Catalytic Activity
Ling-ling Wang,Long Shen,Hai-ying Jin,Lu-ping Zhu,Li-jun Wang*
Author NameAffiliationE-mail
Ling-ling Wang School of Urban Development and Environment Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China  
Long Shen Shanghai Shanshan Technology Co., Ltd., Shanghai 201209, China  
Hai-ying Jin School of Urban Development and Environment Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China  
Lu-ping Zhu School of Urban Development and Environment Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China  
Li-jun Wang* School of Urban Development and Environment Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China ljwang@sspu.edu.cn 
Abstract:
A facile impregnation method under mild condition is designed for synthesis of highly dis-persed Pt nanoparticles with a narrow size of 4-7 nm on nitrogen-doped carbon nanotubes(CNx). CNx do not need any pre-surface modification due to the inherent chemical activ-ity. The structure and nature of Pt/CNx were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy spectrum. All the experimental results revealed that the large amount of doped nitrogen atoms in CNx was virtually effective for capturing the Pt(IV) ions. The improved surface nitrogen functionalities and hydrophilicity contributed to the good dispersion and immobi-lization of Pt nanoparticles on the CNx surface. The Pt/CNx served as active and reusable catalysts in the hydrogenation of allyl alcohol. This could be attributed to high dispersion of Pt nanoparticles and stronger interaction between Pt and the supports, which prevented the Pt nanoparticles from aggregating into less active Pt black and from leaching as well.
Key words:  Carbon nanotube, Nitrogen doping, Allyl alcohol hydrogenation, Pt nanopar-ticles, Heterogeneous catalyst
FundProject:
氮掺杂碳纳米管负载铂催化剂的简易制备及催化性能
汪玲玲,沈龙,靳海英,朱路平,王利军*
摘要:
以氮掺杂碳纳米管为载体,在温和条件下采用简单的浸渍法制备得到铂催化剂,铂的粒径分布在4~7 nm,且氮掺杂碳纳米管无需进行预处理. 采用X射线衍射仪、扫描电子显微镜、透射电镜和能量色散X射线仪等对Pt/CNx催化剂进行了详细的表征. 结果表明,氮掺杂碳纳米管中高含量的氮原子能够有效俘获Pt(IV) 离子,且表面的含氮官能团及亲水性能的提高都有利于铂纳米粒子的分散. Pt/CNx催化剂在烯丙醇加氢反应中表现出高的催化性能及循环使用性能,这是由于铂纳米粒子的高分散性及铂与载体间强的连接性阻止了Pt的流失及聚积,从而避免生成Pt黑导致失活等.
关键词:  碳纳米管,氮掺杂,烯丙醇加氢,非均相催化剂
DOI:10.1063/1674-0068/27/03/327-331
分类号: