Functionalized Carbon Nanotubes as Pt Catalyst Supports in Methanol Oxidation

An efficient method for the functionalization of carbon nanotubes (CNTs) is presented, which uses the HF corrosion and intermittent microwave heating (IMH) H2O2 solution. The Fourier transform infrared spectroscopy, Raman spectroscopy, and transmission electron microscopy are used to investigate the physicochemical properties of the CNTs and the prepared catalysts thereof. Cyclic voltammetry, liner current sweeping measurements, chronoamperometry measurements are employed to study the performance of the prepared catalysts. CNTs further treated with IMH H2O2 solution (10s-on/20s-off, over five cycles) can be used as catalyst support, and exhibit significantly improved performance towards the methanol oxidation in comparison with other modified CNTs. The results represent a novel approach to functionalize CNTs in a simple and economic way. The method can also be applied in the mass production of nanosized materials.

摘要采用 HF 刻蚀及交替微波加 H2O2 相结合的方法进行快速功能化碳纳米管 (CNTs), 应用红外光谱、拉曼光谱和透射电镜等方法详细考察了 CNTs 及其载 Pt 催化剂的物化性质, 并采用循环伏安法、线性电流扫描法和计时电流法考察了所得催化剂的电化学性能. 结果表明, CNTs 经过HF刻蚀和交替微波 H2O2 双重处理后更适合用作催化剂载体, 以 10s-on/20s-off 加热 5 次所得 CNTs 载 Pt 催化剂显示出最佳的催化性能. 这可归因于处理后的 CNTs 表面含有丰富的微孔及含氧官能团, 能有效增强 Pt 颗粒及 CNTs 间的相互作用.

This work report an efficient method to decorate CNTs by combining HF corrosion and intermittent microwave heating H2O2 solution, and it could be easily scaled-up in synthesizing nanomaterials.Figure optionsDownload as PowerPoint slide