Electrocatalytic oxidation of ascorbic acid on mesostructured SiO2-conducting polymer composites
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Título: | Electrocatalytic oxidation of ascorbic acid on mesostructured SiO2-conducting polymer composites |
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Autor/es: | Rivero, Omar | Huerta Arráez, Francisco | Montilla, Francisco | Sanchis Bermúdez, Carlos | Morallon, Emilia |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Hibrid materials | Mesostructured SiO2 | Copolymerization | Copolymer poly(aniline-co-ABA) | Ascorbic acid |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | ago-2015 |
Editor: | Elsevier |
Cita bibliográfica: | European Polymer Journal. 2015, 69: 201-207. doi:10.1016/j.eurpolymj.2015.06.004 |
Resumen: | The conducting self-doping copolymer poly(aniline-co-ABA) preserves its redox activity at pH values as high as 7. This observation was the starting point to synthesize an organic–inorganic hybrid composite able to electrochemically oxidize ascorbic acid molecules at that pH. The inorganic part of the catalytic element was an ordered mesoporous electrodeposit of SiO2, which has been used as the template for the electrochemical insertion of the self-doping copolymer. The oxidation of ascorbate ions at a fixed potential on this composite was studied by means of the kinetic model proposed by Bartlett and Wallace (2001). It was observed that the effective kinetic constant KME increased significantly but, simultaneously, k′ME remained almost constant when the composite was employed as the electrocatalytic substrate. These results were interpreted in the light of two combinations of kinetic constants, which strongly suggested that the increase in KME should be ascribed to the improvement in electronic conductivity of the copolymer induced by the highly ordered silica template. |
Patrocinador/es: | Financial support from the Spanish Ministerio de Economía y Competitividad and FEDER funds (MAT2013-42007-P), from the Generalitat Valenciana (PROMETEO2013/038) and from the Fundación Ramón Areces is gratefully acknowledged. |
URI: | http://hdl.handle.net/10045/53150 |
ISSN: | 0014-3057 (Print) | 1873-1945 (Online) |
DOI: | 10.1016/j.eurpolymj.2015.06.004 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2015 Elsevier Ltd. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.eurpolymj.2015.06.004 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas |
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Archivo | Descripción | Tamaño | Formato | |
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2015_Rivero_etal_EuroPolJ_final.pdf | Versión final (acceso restringido) | 628,84 kB | Adobe PDF | Abrir Solicitar una copia |
2015_Rivero_etal_EuroPolJ_rev.pdf | Versión revisada (acceso abierto) | 894,3 kB | Adobe PDF | Abrir Vista previa |
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