碳负载尺寸可控的铂纳米粒子微波合成和表征

Microwave Synthesis and Characterization of Size-controlled Platinum Nanoparticles Supported on Carbon Supports

分别以XC-72碳和碳纳米管为载体,H2PtCl6为前驱体,用微波辐射加热的方法合成了碳负载的铂纳米粒子,并对其进行了EDX、TEM和XRD表征.研究了H2PtCl6乙二醇溶液的pH值对微波合成铂纳米粒子的大小、均匀性及其在碳载体上分散程度的影响.研究结果发现对于Pt/XC-72碳,随着pH值从3.4增加到9.5,铂纳米粒子的平均粒径从5.5nm减小到2.7nm;对于Pt/CNTs,随着pH值从3.5增加到9.4,铂纳米粒子的平均粒径从5.3nm减小到2.8nm.另外,随着pH值的增加,铂纳米粒子的尺寸均匀性及其在碳载体表面的分散程度得到改善.

Carbon supported platinum nanoparticles were synthesized by microwave assisted heating ethylene glycol solution of H2PtCl6 with different pH values in the presence of XC-72 carbon or carbon nanotubes supports. The products were characterized by EDX, TEM and XRD. The effects of pH values of ethylene glycol solutions on the sizes and uniformity of Pt nanoparticles and their dispersion on carbon supports surfaces were investigated. TEM images show that the average diameter of platinum nanoparticles decreases from 5.5nm to 2.7nm with the increase of pH values from 3.4 to 9.5 for Pt/XC-72, and the average diameter from 5.3nm to 2.8nm with the increase of pH values from 3.5 to 9.4 for Pt/CNTs. In addition, increasing pH values of ethylene glycol solution can improve the size uniformity and dispersity of platinum nanoparticles on carbon surfaces.