A simple one-step preparation of high utilization AuPt nanoparticles supported on MWCNTs for methanol oxidation in alkaline medium

作者：Guo Xun; Guo Dao Jun; Qiu Xin Ping^*; Chen Li Quan; Zhu Wen Tao

来源：Electrochemistry Communications, 2008, 10(11): 1748-1751.

DOI：10.1016/j.elecom.2008.09.005

• Methanol electro-oxidation
• Ethylene glycol reduction
• AuPt nanoparticles
• Multi-walled carbon nanotubes
• Alkaline fuel cell
• Direct methanol fuel cell

A simple one-step preparation of gold-platinum electrocatalysts supported on multi-walled carbon nanotubes (MWCNTs) with high utilization is reported. A low Pt loading series of bimetallic Aupt/MWCNTs catalysts were prepared by the improved ethylene glycol reduction method, and then they were compared in terms of the electrocatalytic activity for methanol oxidation using cyclic voltammetry (CV) and chronoamperometry in alkaline solutions. The structure of AuPt/MWCNTs was characterized by the transmission electron microscopy (TEM), X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS). The results showed high Pt utilization, uniform AuPt nanoparticles size and good electrocatalytic activity for methanol electro-oxidation. The effect of Au/Pt mass ratio on electrocatalytic activity was also investigated by CV and chronoamperometry. The highest peak current density, lowest onset potential and best anti-poisoning effect for methanol electro-oxidation appeared at the Au/Pt/MWCNTs mass ratio of 2:4:32.

• 出版日期2008-11
• 单位清华大学; 曲阜师范大学