PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media
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| Título: | PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media |
|---|---|
| Autor/es: | Jukk, Kristel | Kongi, Nadezda | Tammeveski, Kaido | Solla-Gullón, José | Feliu, Juan M. |
| Grupo/s de investigación o GITE: | Electroquímica de Superficies | Electroquímica Aplicada y Electrocatálisis |
| Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
| Palabras clave: | PdPt alloy nanoparticles | Oxygen reduction | Electrocatalysis | Shape-controlled nanocubes | Bimetallic catalysts |
| Área/s de conocimiento: | Química Física |
| Fecha de publicación: | jul-2015 |
| Editor: | Elsevier |
| Cita bibliográfica: | Electrochemistry Communications. 2015, 56: 11-15. doi:10.1016/j.elecom.2015.04.001 |
| Resumen: | In this work, PdPt alloy nanocubes with different metal ratios were synthesised in the presence of polyvinylpyrrolidone (PVP). The surface morphology of the PdPt samples was characterised by transmission electron microscopy (TEM). TEM images showed that PdPt nanoparticles were cubic-shaped and the average size of the cubes was about 8–10 nm. Their electrocatalytic activity towards the oxygen reduction reaction (ORR) was studied in 0.5 M H2SO4 using the rotating disc electrode method. All the alloyed catalysts showed enhanced electrocatalytic activity for ORR as compared to the monometallic cubic Pd nanoparticles. Half-wave potential values for PdPt catalysts were comparable with that of Pt nanocubes. From the alloyed catalysts Pd36Pt64 exhibited the highest specific activity, which was only slightly lower than that of cubic Pt nanoparticles. The Koutecky–Levich analysis revealed that the reduction of oxygen proceeded via 4-electron pathway on all the electrocatalysts studied. |
| Patrocinador/es: | This research was financially supported by institutional research funding (IUT20-16) of the Estonian Ministry of Education and Research and by the Estonian Research Council (Grant No. 9323) and by Archimedes Foundation (Project No. 3.2.0501.10-0015). KJ thanks the Archimedes Foundation for scholarship. JMF acknowledges financial support from MINECO (Spain), project CTQ2013-44083-P. |
| URI: | http://hdl.handle.net/10045/46270 |
| ISSN: | 1388-2481 (Print) | 1873-1902 (Online) |
| DOI: | 10.1016/j.elecom.2015.04.001 |
| Idioma: | eng |
| Tipo: | info:eu-repo/semantics/article |
| Derechos: | © 2015 Elsevier B.V. |
| Revisión científica: | si |
| Versión del editor: | http://dx.doi.org/10.1016/j.elecom.2015.04.001 |
| Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas INV - LEQA - Artículos de Revistas |
Archivos en este ítem:
| Archivo | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
 2015_Jukk_etal_ElectrComm_final.pdf | Versión final (acceso restringido) | 1,31 MB | Adobe PDF | Abrir Solicitar una copia |
 2015_Jukk_etal_ElectrComm_accepted.pdf | Accepted Manuscript (acceso abierto) | 469,3 kB | Adobe PDF | Abrir Vista previa |
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