Exploring the electrochemical performance of graphitic paste electrodes: graphene vs. graphite
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http://hdl.handle.net/10045/38724
Título: | Exploring the electrochemical performance of graphitic paste electrodes: graphene vs. graphite |
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Autor/es: | Figueiredo-Filho, Luiz C.S. | Brownson, Dale A.C. | Gomez-Mingot, Maria | Iniesta, Jesus | Fatibello-Filho, Orlando | Banks, Craig E. |
Grupo/s de investigación o GITE: | Electroquímica Aplicada y Electrocatálisis |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Palabras clave: | Graphene | Graphite | Paste electrodes | Electrochemical |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 6-sep-2013 |
Editor: | Royal Society of Chemistry |
Cita bibliográfica: | Analyst. 2013,138: 6354-6364. doi:10.1039/C3AN00950E |
Resumen: | We report the fabrication, characterisation (SEM, TEM, XPS and Raman spectroscopy) and electrochemical implementation of a graphene paste electrode. The paste electrodes utilised are constructed by simply mixing graphene with mineral oil (which acts as a binder) prior to loading the resultant paste into a piston-driven polymeric-tubing electrode-shell, where this electrode configuration allows for rapid renewal of the electrode surface. The fabricated paste electrode is electrochemically characterised using both inner-sphere and outer-sphere redox probes, namely potassium ferrocyanide(II), hexaammine-ruthenium(III) chloride and hexachloroiridate(III), in addition to the biologically relevant and electroactive analytes, L-ascorbic acid (AA) and uric acid (UA). Comparisons are made with a graphite paste alternative and the benefits of graphene implementation as a paste electrode within electrochemistry are explored, as well as the characterisation of their electroanalytical performances. We reveal no observable differences in the electrochemical performance and thus suggest that there are no advantages of using graphene over graphite in the fabrication of paste electrodes. Such work is highly important and informative for those working in the field of electroanalysis where electrochemistry can provide portable, rapid, reliable and accurate sensing protocols (bringing the laboratory into the field), with particular relevance to those searching for new electrode materials. |
URI: | http://hdl.handle.net/10045/38724 |
ISSN: | 0003-2654 (Print) | 1364-5528 (Online) |
DOI: | 10.1039/C3AN00950E |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © Royal Society of Chemistry 2013 |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1039/C3AN00950E |
Aparece en las colecciones: | INV - LEQA - Artículos de Revistas |
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2013_Figueiredo_etal_Analyst_final.pdf | Versión final (acceso restringido) | 617,28 kB | Adobe PDF | Abrir Solicitar una copia |
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