Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5145851 | International Journal of Hydrogen Energy | 2016 | 12 Pages |
Abstract
The synthesis and characterization of Pt-Ni nanoparticles with different Ni:Pt atomic ratios and supported on multi-walled carbon nanotubes (MWCNTs) for oxygen reduction reaction (RRO) is investigated. The crystal structure and the elemental analysis of Pt-Ni/MWCNTs nanocatalysts are characterized by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS), respectively. The morphology of these nanocatalysts is observed by transmission electron microscopy (TEM). The results reveal that Pt-Ni nanocatalysts with a nanoparticle size ranging from 6 to 7Â nm are immobilized on the surface of MWCNTs. The kinetics and mechanism of the ORR were analyzed in a 0.5Â MÂ H2SO4 solution. The cyclic voltammetry response indicates that PtNi/MWCNTs catalyst displays a higher performance than Pt/MWCNT, which may be due to the alloy of Ni species in PtNi systems, demonstrating that they are promising materials for using in fuel cells.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
G. Rosado, Y. Verde, A.M. Valenzuela-Muñiz, Romeli Barbosa, M. Miki Yoshida, B. Escobar,