Ethanol oxidation on shape-controlled platinum nanoparticles at different pHs: A combined in situ IR spectroscopy and online mass spectrometry study
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http://hdl.handle.net/10045/62319
Título: | Ethanol oxidation on shape-controlled platinum nanoparticles at different pHs: A combined in situ IR spectroscopy and online mass spectrometry study |
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Autor/es: | Busó-Rogero, Carlos | Brimaud, Sylvain | Solla-Gullón, José | Vidal-Iglesias, Francisco J. | Herrero, Enrique | Behm, R. Jürgen | Feliu, Juan M. |
Grupo/s de investigación o GITE: | Electroquímica de Superficies | Electroquímica Aplicada y Electrocatálisis |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Palabras clave: | Ethanol oxidation | pH effect | Platinum | Nanoparticles | DEMS |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 15-feb-2016 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Electroanalytical Chemistry. 2016, 763: 116-124. doi:10.1016/j.jelechem.2015.12.034 |
Resumen: | Ethanol oxidation on different shape-controlled platinum nanoparticles at different pHs was studied using electrochemical, Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATR-FTIR) and, especially, Differential Electrochemical Mass Spectrometry (DEMS) techniques, the latter giving interesting quantitative information about the products of ethanol oxidation. Two Pt nanoparticle samples were used for this purpose: (100) and (111) preferentially oriented Pt nanoparticles. The results are in agreement with previous findings that the preferred decomposition product depends on surface structure, with COads formation on (100) domains and acetaldehyde/acetic acid formation on (111) domains. However, new information has been obtained about the changes in CHx and CO formation at lower potentials when the pH is changed, showing that CHx formation is favored against the decrease in CO adsorption on (100) domains. At higher potentials, complete oxidation to CO2 occurs from both CHx and CO fragments. In (111) Pt nanoparticles, the splitting of Csingle bondC bond is hindered, favoring acetaldehyde and acetate formation even in 0.5 M H2SO4. C1 fragments become even less when the pH increases, being nearly negligible in the highest pH studied. |
Patrocinador/es: | This work has been financially supported by the MCINN-FEDER (Spain) and Generalitat Valenciana through projects CTQ 2013-44083-P and PROMETEO/2014/013, respectively. |
URI: | http://hdl.handle.net/10045/62319 |
ISSN: | 1572-6657 (Print) | 1873-2569 (Online) |
DOI: | 10.1016/j.jelechem.2015.12.034 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2015 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.jelechem.2015.12.034 |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas INV - LEQA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2016_Buso_etal_JEC_final.pdf | Versión final (acceso restringido) | 2,74 MB | Adobe PDF | Abrir Solicitar una copia |
2016_Buso_etal_JEC_preprint.pdf | Preprint (acceso abierto) | 2,48 MB | Adobe PDF | Abrir Vista previa |
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