Glycerol electrooxidation on Pd modified Au surfaces in alkaline media: Effect of the deposition method
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Título: | Glycerol electrooxidation on Pd modified Au surfaces in alkaline media: Effect of the deposition method |
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Autor/es: | Mello, Gisele A.B. | Busó-Rogero, Carlos | 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: | Glycerol electrooxidation | Pd modified | Au surfaces | Alkaline media | Deposition method |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 8-nov-2018 |
Editor: | AIP Publishing |
Cita bibliográfica: | The Journal of Chemical Physics. 2019, 150: 041703. doi:10.1063/1.5048489 |
Resumen: | The catalytic effect of Pd on gold electrodes for glycerol oxidation is evaluated for Pd-Au surfaces prepared using three different methods: irreversible adsorption of palladium by a simple immersion of a gold electrode in palladium solution, the deposition of palladium on the gold substrate by a step potential from 1 to 0.75 V, and the forced deposition of palladium on the gold electrode with the help of a reducing hydrogen atmosphere. Voltammetry has been used for the electrochemical characterization of the Pd-Au deposits and to determine its reactivity towards glycerol oxidation, whereas FTIR experiments have allowed detecting adsorbed species and products formed during the oxidation reaction. Pd-Au surfaces prepared by irreversible adsorption are the electrodes that show the highest activity for the glycerol complete oxidation to carbonate, whereas Pd-Au surfaces made by the step potential are the catalyst that exhibits the highest rate for the formation and adsorption CO before carbonate production, poisoning the surface and diminishing their electrocatalytic properties. In addition to carbonate, glycerate, glycolate, and formate are detected as oxidation products. The integrated bands of the spectra are used to give quantitative information for comparing the product distribution of the different Pd-Au deposits prepared. |
Patrocinador/es: | This work has been financially supported by the Ministerio de Economía y Competitividad and Generalitat Valenciana by Project Nos. CTQ2016-76221-P and PROMETEOII/2014/013, respectively. G.A.B.M. also thanks her post-doctorate fellowship from CNPq (Grant No. PDE 233268/2014-6). |
URI: | http://hdl.handle.net/10045/83287 |
ISSN: | 0021-9606 (Print) | 1089-7690 (Online) |
DOI: | 10.1063/1.5048489 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2018 AIP Publishing LLC |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1063/1.5048489 |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas |
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