Catalytic activity of Pt-Ni nanoparticles supported on multi-walled carbon nanotubes for the oxygen reduction reaction
| Autor: | Gabriel Rosado, Beatriz Escobar, Ysmael Verde, Ana Maria Valenzuela-Muñiz, M. Miki Yoshida, Romeli Barbosa |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Inorganic chemistry Alloy Energy Engineering and Power Technology Nanoparticle 02 engineering and technology Crystal structure Carbon nanotube engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanomaterial-based catalyst 0104 chemical sciences Catalysis law.invention Fuel Technology Chemical engineering Transmission electron microscopy law engineering Cyclic voltammetry 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 41:23260-23271 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.07.098 |
| Popis: | 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 7 nm are immobilized on the surface of MWCNTs. The kinetics and mechanism of the ORR were analyzed in a 0.5 M H 2 SO 4 solution. The cyclic voltammetry response indicates that Pt Ni/MWCNTs catalyst displays a higher performance than Pt/MWCNT, which may be due to the alloy of Ni species in Pt Ni systems, demonstrating that they are promising materials for using in fuel cells. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect