Multi-walled carbon nanotube modified with methylene blue under ultraviolet irradiation as a platinum catalyst support for methanol oxidation

作者：Yang, Guotao; Yang, Xikun; Xu, Mingli^*; Min, Chungang; Xiao, Haifeng; Jiang, Kezhu; Chen, Linyan; Wang, Guanghua

来源：Journal of Power Sources, 2013, 222: 340-343.

DOI：10.1016/j.jpowsour.2012.08.074

• Electrocatalyst
• Multi-walled carbon nanotube
• Methylene blue
• Methanol oxidation
• Ultraviolet irradiation

To improve the utilization and activity of anodic catalysts for direct methanol fuel cells, multi-walled carbon nanotube (MWCNT) is used as a support for platinum (Pt) nanoparticles synthesized by method of ultraviolet irradiation. MWCNT is modified by methylene blue (f(0)-MWCNT) under ultraviolet light (f(1)-MWCNT), and then Pt nanoparticles are assembled on the f(1)-MWCNT to form composites (Pt/f(1) MWCNT). Fourier transform infrared spectroscopy analysis reveals that the surface of MWCNT is successfully functionalized. Transmission electron microscopy and X-ray diffraction analyses exhibit that the uniformly dispersed Pt nanoparticles of around 2.5 nm in size are obtained. Cyclic voltammetric and chronoamperometric experiments demonstrate that the as-prepared Pt/f(1)-MWCNT composites show higher catalytic activity and better stability compared with Pt/f(0)-MWCNT and commercial Pt/C (JM), which is vital to anode electrocatalysis in direct methanol fuel cells.

• 出版日期2013-1-15
• 单位昆明理工大学