Multiwalled carbon nanotube-supported Pt/Sn and Pt/Sn/PMo12 electrocatalysts for methanol electro-oxidation

Authors

D M. Han, ISEM, University of Wollongong
Zaiping Guo, University of WollongongFollow
Rong Zeng, University of WollongongFollow
C. J Kim, I-Cube Center, Gyeongsang National University
Y Meng, Sun Yat Sen Univ, Sch Phys & Engn
Hua-Kun Liu, University of WollongongFollow

RIS ID

31444

Publication Details

Han, D. M., Guo, Z., Zeng, R., Kim, C., Meng, Y. & Liu, H. K. (2009). Multiwalled carbon nanotube-supported Pt/Sn and Pt/Sn/PMo₁₂ electrocatalysts for methanol electro-oxidation. International Journal of Hydrogen Energy, 34 (5), 2426-2434.

Abstract

Carbon nanotube (CNT) containing electrocatalysts, Pt/Sn/PMo₁₂/CNT, Pt/Sn/CNT, and Pt/CNT, were prepared by a microwave-heated polyol process. The electrocatalysts were characterized by X-ray diffraction, energy dispersive spectroscopy, scanning and transmission electron microscopy, and cyclic voltammetry. We found that the addition of PMo₁₂ can help Pt-Sn nanoparticles to disperse very uniformly on the outer walls of CNTs. The Pt/Sn/PMo₁₂/CNT catalyst exhibited the lowest onset potential for electro-oxidation of adsorbed C intermediates, compared to the Pt/Sn/CNT and Pt/CNT catalysts. It also generated much higher current density for methanol oxidation at room temperature compared to Pt/Sn/CNT and Pt/CNT catalysts, which were prepared by the same method.