Ethanol Electro-oxidation Reaction Selectivity on Platinum in Aqueous Media
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/125072
Título: | Ethanol Electro-oxidation Reaction Selectivity on Platinum in Aqueous Media |
---|---|
Autor/es: | Rizo, Rubén | Ferre-Vilaplana, Adolfo | Herrero, Enrique | Feliu, Juan M. |
Grupo/s de investigación o GITE: | Electroquímica de Superficies |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Palabras clave: | Electrocatalysis | Selectivity | Ethanol oxidation | Adsorbed OH | Platinum | Density-functional theory calculations |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 12-jul-2022 |
Editor: | American Chemical Society |
Cita bibliográfica: | ACS Sustainable Chemistry & Engineering. 2023, 11(13): 4960-4968. https://doi.org/10.1021/acssuschemeng.2c02663 |
Resumen: | Ethanol fuel cells require selective catalysts for complete oxidation of the fuel, which involves C–C bond cleavage. From experiments on well-defined surfaces and calculations, the mechanism controlling the ethanol electro-oxidation selectivity on platinum in aqueous media as a model system is elucidated. Adsorbed OH favors ethanol adsorption and conversion into adsorbed ethoxy, which favorably evolves to adsorbed COCH3. On Pt(111), adsorbed OH is also readily incorporated into adsorbed COCH3 to yield acetic acid. A higher barrier for this latter step on Pt(100) enables the COCH3 dehydrogenation to adsorbed COCH2, favoring C–C bond cleavage. As adsorbed OH plays an essential role as a reactant in this process, its adsorption properties have a decisive impact on this reaction. Furthermore, the adsorbed OH diffusion rate on the surface, which depends on the adsorbate/media/surface interaction at the interface, modulates the availability of this key reactant. These results highlight that the search for selective electrocatalysts requires holistic consideration of reactants, adsorbates, media, and substrate. |
Patrocinador/es: | This research was funded by Ministerio de Ciencia e Innovación (Spain) grant nos. PID2019-105653GB-I00 and FJC2018-038607-I and Generalitat Valenciana (Spain) grant no. PROMETEO/2020/063. |
URI: | http://hdl.handle.net/10045/125072 |
ISSN: | 2168-0485 |
DOI: | 10.1021/acssuschemeng.2c02663 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022 The Authors. Published by American Chemical Society. Creative Commons Attribution 4.0 International License (CC BY 4.0) |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1021/acssuschemeng.2c02663 |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Rizo_etal_2023_ACSSustainableChemEng.pdf | 3,84 MB | Adobe PDF | Abrir Vista previa | |
Este ítem está licenciado bajo Licencia Creative Commons