On the Origin of the Effect of pH in Oxygen Reduction Reaction for Nondoped and Edge-Type Quaternary N-Doped Metal-Free Carbon-Based Catalysts
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Título: | On the Origin of the Effect of pH in Oxygen Reduction Reaction for Nondoped and Edge-Type Quaternary N-Doped Metal-Free Carbon-Based Catalysts |
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Autor/es: | Quílez-Bermejo, Javier | Strutyński, Karol | Melle-Franco, Manuel | 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: | Oxygen reduction reaction | Experimental chemistry | Computational modeling | Carbon-based catalysts | Nitrogen doping | pH effect |
Área/s de conocimiento: | Química Inorgánica | Química Física |
Fecha de publicación: | 25-nov-2020 |
Editor: | American Chemical Society |
Cita bibliográfica: | ACS Applied Materials & Interfaces. 2020, 12(49): 54815-54823. https://doi.org/10.1021/acsami.0c17249 |
Resumen: | Metal-free carbon-based catalysts have gained much attention during the last 15 years as an alternative toward the replacement of platinum-based catalysts for the oxygen reduction reaction (ORR). However, carbon-based catalysts only show promising catalytic activity in alkaline solution. Concurrently, the most optimized polymer electrolyte membrane fuel cells use proton exchange membranes. This means that the cathode electrode is surrounded by a protonic environment in which carbon materials show poor performance, with differences above 0.5 V in EONSET for nondoped carbon materials. Therefore, the search for highly active carbon-based catalysts is only possible if we first understand the origin of the poor electrocatalytic activity of this kind of catalysts in acidic conditions. We address this matter through a combined experimental and modeling study, which yields fundamental principles on the origin of the pH effects in ORR for carbon-based materials. This is relevant for the design of pH-independent metal-free carbon-based catalysts. |
Patrocinador/es: | The authors thank Ministerio de Ciencia, Innovación y Universidades, and FEDER for the financial support (projects RTI2018-095291-B-I00 and ENE2017-90932-REDT) and the Portuguese Foundation for Science and Technology (FCT) under the projects IF/00894/2015 and CICECO-Aveiro Institute of Materials, UIDB/50011/2020 and UIDP/50011/2020, financed by national funds through the FCT/MCTES. |
URI: | http://hdl.handle.net/10045/111163 |
ISSN: | 1944-8244 (Print) | 1944-8252 (Online) |
DOI: | 10.1021/acsami.0c17249 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 American Chemical Society |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1021/acsami.0c17249 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Quilez-Bermejo_etal_2020_ACSApplMaterInterfaces_final.pdf | Versión final (acceso restringido) | 3,38 MB | Adobe PDF | Abrir Solicitar una copia |
Quilez-Bermejo_etal_2020_ACSApplMaterInterfaces_preprint.pdf | Preprint (acceso abierto) | 2,16 MB | Adobe PDF | Abrir Vista previa |
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