Nitrogen-Doped Superporous Activated Carbons as Electrocatalysts for the Oxygen Reduction Reaction

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Título: Nitrogen-Doped Superporous Activated Carbons as Electrocatalysts for the Oxygen Reduction Reaction
Autor/es: Mostazo-López, María José | Salinas Torres, David | Ruiz-Rosas, Ramiro | Morallon, Emilia | Cazorla-Amorós, Diego
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 Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Palabras clave: Porous carbons | Polyaniline | Nitrogen functionalization | Electrocatalysis | Oxygen reduction reaction
Área/s de conocimiento: Química Inorgánica | Química Física
Fecha de publicación: 25-abr-2019
Editor: MDPI
Cita bibliográfica: Mostazo-López MJ, Salinas-Torres D, Ruiz-Rosas R, Morallón E, Cazorla-Amorós D. Nitrogen-Doped Superporous Activated Carbons as Electrocatalysts for the Oxygen Reduction Reaction. Materials. 2019; 12(8):1346. doi:10.3390/ma12081346
Resumen: Nitrogen-containing superporous activated carbons were prepared by chemical polymerization of aniline and nitrogen functionalization by organic routes. The resulting N-doped carbon materials were carbonized at high temperatures (600–800 °C) in inert atmosphere. X-ray Photoelectron Spectroscopy (XPS) revealed that nitrogen amount ranges from 1 to 4 at.% and the nature of the nitrogen groups depends on the treatment temperature. All samples were assessed as electrocatalysts for the oxygen reduction reaction (ORR) in alkaline solution (0.1 M KOH) in order to understand the role of well-developed microporosity as well as the different nitrogen functionalities on the electrocatalytic performance in ORR. It was observed that nitrogen groups generated at high temperatures were highly selective towards the water formation. Among the investigated samples, polyaniline-derived activated carbon carbonized at 800 °C displayed the best performance (onset potential of 0.88 V versus RHE and an electron transfer number of 3.4), which was attributed to the highest concentration of N–C–O sites.
Patrocinador/es: This research was funded byMINECO and European Regional Development Fund (RTI2018-095291-B-I00, MAT2016-76595-R and ENE2017-90932-REDT). MJML acknowledges financial support of Generalitat Valenciana through VALi+d grant (ACIF/2015/374). DST thanks MINECO for a ‘Juan de la Cierva’ contract (IJCI-2016-27636).
URI: http://hdl.handle.net/10045/92234
ISSN: 1996-1944
DOI: 10.3390/ma12081346
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Revisión científica: si
Versión del editor: https://doi.org/10.3390/ma12081346
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