Enhanced electro-oxidation resistance of carbon electrodes induced by phosphorus surface groups
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Título: | Enhanced electro-oxidation resistance of carbon electrodes induced by phosphorus surface groups |
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Autor/es: | Berenguer Betrián, Raúl | Ruiz-Rosas, Ramiro | Gallardo, Aurora | Cazorla-Amorós, Diego | Morallon, Emilia | Nishihara, Hirotomo | Kyotani, Takashi | Rodríguez-Mirasol, José | Cordero, Tomás |
Grupo/s de investigación o GITE: | Materiales Carbonosos y Medio Ambiente | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Electro-oxidation | Carbon electrodes | Phosphorus surface groups |
Área/s de conocimiento: | Química Física | Química Inorgánica |
Fecha de publicación: | dic-2015 |
Editor: | Elsevier |
Cita bibliográfica: | Carbon. 2015, 95: 681-689. doi:10.1016/j.carbon.2015.08.101 |
Resumen: | The electro-oxidation of carbon materials enormously degrades their performance and limits their wider utilization in multiple electrochemical applications. In this work, the positive influence of phosphorus functionalities on the overall electrochemical stability of carbon materials has been demonstrated under different conditions. We show that the extent and selectivity of electroxidation in P-containing carbons are completely different to those observed in conventional carbons without P. The electro-oxidation of P-containing carbons involves the active participation of phosphorus surface groups, which are gradually transformed at high potentials from less-to more-oxidized species to slow down the introduction of oxygen groups on the carbon surface (oxidation) and the subsequent generation of (C*OOH)-like unstable promoters of electro-gasification. The highest-oxidized P groups (–C–O–P-like species) seem to distribute the gained oxygen to neighboring carbon sites, which finally suffer oxidation and/or gasification. So it is thought that P-groups could act as mediators of carbon oxidation although including various steps and intermediates compared to electroxidation in P-free materials. |
Patrocinador/es: | Financial support by the Spanish Ministerio de Economía y Competitividad, for the MAT2013-42007-P, P09-FQM-5156R, CTQ2012-36408, JCI2011-10566, JCI-2012-12664 and the Joint Spanish-Japanese (PRI-PIBJP-2011-0766) projects, FEDER and the Junta de Andalucía are gratefully acknowledged. |
URI: | http://hdl.handle.net/10045/49369 |
ISSN: | 0008-6223 (Print) | 1873-3891 (Online) |
DOI: | 10.1016/j.carbon.2015.08.101 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2015 Elsevier Ltd. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.carbon.2015.08.101 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas INV - MCMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2015_Berenguer_etal_Carbon_final.pdf | Versión final (acceso restringido) | 2,29 MB | Adobe PDF | Abrir Solicitar una copia |
2015_Berenguer_etal_Carbon_accepted.pdf | Accepted Manuscript (acceso abierto) | 2,09 MB | Adobe PDF | Abrir Vista previa |
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