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Preparation of Pt nanoparticles on carbon nanotubes by hydrothermal method

机译:水热法在碳纳米管上制备铂纳米粒子

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摘要

A novel method, a hydrothermal method, was firstly employed to prepare a catalyst of Pt supported on carbon nanotubes (Pt/CNTs) used in a proton exchange membrane fuel cell (PEMFC) in the present work. The catalyst was characterized through the IR spectrum, XRD, TEM and Image-Pro PLUS2 software. The results show that the pretreatment using a HNO_3-H_2O_2 redox system on CNTs opened the ports and removed a large quantity of impurities. Reaction temperature and time are important factors to determine the Pt granule size. The average size of the Pt nanoparticles is less than 1.94 nm with homogenous dispersion and narrow distribution under the optimal reaction conditions with a reaction time of 1.5 h at 140℃. The hydrothermal method using the conventional Pt precursor H_2PtCl_6·2H_2O together with HCHO with brief operation will be a promising method to yield Pt nanoparticles for the Pt/CNTs catalyst.
机译:在本工作中,首先采用一种新颖的方法,即水热法来制备负载在质子交换膜燃料电池(PEMFC)中的碳纳米管(Pt / CNTs)上的Pt催化剂。通过红外光谱,XRD,TEM和Image-Pro PLUS2软件对催化剂进行了表征。结果表明,在碳纳米管上使用HNO_3-H_2O_2氧化还原系统进行预处理可以打开端口并去除大量杂质。反应温度和时间是确定Pt颗粒尺寸的重要因素。 Pt纳米粒子的平均粒径小于1.94 nm,在最佳反应条件下,140℃反应时间为1.5 h,分散均匀,分布窄。将常规Pt前驱体H_2PtCl_6·2H_2O与HCHO一起进行短暂操作的水热方法将是一种有前途的生产Pt / CNTs催化剂的Pt纳米颗粒的方法。

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