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

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Títol: Nitrogen-Doped Superporous Activated Carbons as Electrocatalysts for the Oxygen Reduction Reaction
Autors: Mostazo-López, María José | Salinas Torres, David | Ruiz-Rosas, Ramiro | Morallon, Emilia | Cazorla-Amorós, Diego
Grups d'investigació o GITE: Materiales Carbonosos y Medio Ambiente | Electrocatálisis y Electroquímica de Polímeros
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales
Paraules clau: Porous carbons | Polyaniline | Nitrogen functionalization | Electrocatalysis | Oxygen reduction reaction
Àrees de coneixement: Química Inorgánica | Química Física
Data de publicació: 25-d’abril-2019
Editor: MDPI
Citació bibliogràfica: 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
Resum: 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.
Patrocinadors: 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
Tipus: info:eu-repo/semantics/article
Drets: © 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/).
Revisió científica: si
Versió de l'editor: https://doi.org/10.3390/ma12081346
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