Oxygen reduction reaction on stepped platinum surfaces in alkaline media
Empreu sempre aquest identificador per citar o enllaçar aquest ítem
http://hdl.handle.net/10045/38753
Títol: | Oxygen reduction reaction on stepped platinum surfaces in alkaline media |
---|---|
Autors: | Rizo, Rubén | Herrero, Enrique | Feliu, Juan M. |
Grups d'investigació o GITE: | Electroquímica de Superficies |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Paraules clau: | Oxygen reduction reaction | Platinum surfaces | Single crystals electrodes | Alkaline media |
Àrees de coneixement: | Química Física |
Data de publicació: | 12-de juliol-2013 |
Editor: | Royal Society of Chemistry |
Citació bibliogràfica: | Physical Chemistry Chemical Physics. 2013, 15: 15416-15425. doi:10.1039/C3CP51642C |
Resum: | The oxygen reduction reaction (ORR) in 0.1 M NaOH on platinum single crystal electrodes has been studied using hanging meniscus rotating disk electrode configuration. Basal planes and stepped surfaces with (111) and (100) terraces have been employed. The results indicate that the Pt(111) electrode has the highest electrocatalytic activity among all the studied surfaces. The addition of steps on this electrode surface significantly diminishes the reactivity of the surface towards the ORR. In fact, the reactivity of the steps on the surfaces with wide terraces can be considered negligible with respect to that measured for the terrace. On the other hand, Pt(100) and Pt(110) electrodes have much lower activity than the Pt(111) electrode. These results have been compared with those obtained in acid media to understand the effect of the pH and the adsorbed OH on the mechanism. It is proposed that the surface covered by adsorbed OH is active for the reduction of the oxygen molecules. |
Patrocinadors: | This work has been financially supported by the MICINN (Spain) (project CTQ2010-16271-FEDER) and Generalitat Valenciana (project PROMETEO/2009/045, -FEDER). |
URI: | http://hdl.handle.net/10045/38753 |
ISSN: | 1463-9076 (Print) | 1463-9084 (Online) |
DOI: | 10.1039/C3CP51642C |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © Royal Society of Chemistry 2013 |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1039/C3CP51642C |
Apareix a la col·lecció: | INV - EQSUP - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
---|---|---|---|---|
2013_Rizo_etal_PCCP_final.pdf | Versión final (acceso restringido) | 1,29 MB | Adobe PDF | Obrir Sol·licitar una còpia |
2013_Rizo_etal_PCCP.pdf | Versión revisada (acceso abierto) | 526,92 kB | Adobe PDF | Obrir Vista prèvia |
Tots els documents dipositats a RUA estan protegits per drets d'autors. Alguns drets reservats.