摘要
A Pt/C/TiO 2 nanotube composite catalyst was successfully prepared for enhanced methanol electro-oxidation. Pt nanoparticles with a particle size of 2 nm were synthesized by plasma sputtering in water, and anatase TiO 2 nanotubes with an inner diameter of approximately 100 nm were prepared by a simple two-step anodization method and annealing process. Field-emission scanning electron microscopy images indicated that the different morphologies of TiO 2 synthesized on the surface of Ti foils were dependent on the different anodization parameters. The electrochemical performance of Pt/C/TiO 2 catalysts for methanol oxidation showed that TiO 2 nanotubes were more suitable for use as Pt nanoparticle support materials than irregular TiO 2 short nanorods due to their tubular morphology and better electronic conductivity. X-ray photoelectron spectroscopy characterization showed that the binding energies of the Pt 4f of the Pt/C/TiO 2 nanotubes exhibited a slightly positive shift caused by the relatively strong interaction between Pt and the TiO 2 nanotubes, which could mitigate the poisoning of the Pt catalyst by CO ads , and further enhance the electrocatalytic performance. Thus, the as-obtained Pt/C/TiO 2 nanotubes composites may become a promising catalyst for methanol electro-oxidation.
| 源语言 | 英语 |
|---|---|
| 页（从-至） | 403-410 |
| 页数 | 8 |
| 期刊 | Applied Surface Science |
| 卷 | 399 |
| DOI | |
| 出版状态 | 已出版 - 31 3月 2017 |