Formic acid electrooxidation on thallium-decorated shape-controlled platinum nanoparticles: an improvement in electrocatalytic activity
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Título: | Formic acid electrooxidation on thallium-decorated shape-controlled platinum nanoparticles: an improvement in electrocatalytic activity |
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Autor/es: | Busó-Rogero, Carlos | Perales-Rondón, Juan V. | Farias, Manuel J.S. | Vidal-Iglesias, Francisco J. | Solla-Gullón, José | Herrero, Enrique | 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: | Formic acid electrooxidation | Thallium | Platinum nanoparticles | Electrocatalysts |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 27-feb-2014 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | Physical Chemistry Chemical Physics. 2014, Advance Article. doi:10.1039/C4CP00304G |
Resumen: | Thallium modified shape-controlled Pt nanoparticles were prepared and their electrocatalytic activity towards formic acid electrooxidation was evaluated in 0.5 M sulfuric acid. The electrochemical and in situ FTIR spectroscopic results show a remarkable improvement in the electrocatalytic activity, especially in the low potential region (around 0.1–0.2 V vs. RHE). Cubic Pt nanoparticles modified with Tl were found to be more active than the octahedral Pt ones in the entire range of Tl coverages and potential windows. In situ FTIR spectra indicate that the promotional effect produced by Tl results in the inhibition of the poisoning step leading to COads, thus improving the onset potential for the complete formic acid oxidation to CO2. Chronoamperometric experiments were also performed at 0.2 V to evaluate the stability of the electrocatalysts at constant potential. Finally, experiments with different concentrations of formic acid (0.05–1 M) were also carried out. In all cases, Tl-modified cubic Pt nanoparticles result to be the most active. All these facts reinforce the importance of controlling the surface structure of the electrocatalysts to optimize their electrocatalytic properties. |
Patrocinador/es: | This work has been financially supported by the MICINN (Spain) (project CTQ2010-16271) and Generalitat Valenciana (project PROMETEO/2009/045 – FEDER). |
URI: | http://hdl.handle.net/10045/36566 |
ISSN: | 1463-9076 (Print) | 1463-9084 (Online) |
DOI: | 10.1039/C4CP00304G |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1039/C4CP00304G |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas INV - LEQA - Artículos de Revistas |
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