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Título: | A study of Faradaic phenomena in activated carbon by means of macroelectrodes and single particle electrodes |
Autor: | Ruiz Ruiz, Vanesa CSIC ORCID; Malmberg, H.; Blanco Rodríguez, Clara CSIC ORCID ; Lundblad, A.; Björnbom, P.; Santamaría Ramírez, Ricardo CSIC ORCID | Palabras clave: | Activated carbon Surface chemistry Supercapacitor Cyclic voltammetry |
Fecha de publicación: | 18-mar-2008 | Editor: | Elsevier | Citación: | Journal of Electroanalytical Chemistry 618(1-2): 33-38 (2008) | Resumen: | The electrochemical behaviour of a chemically activated carbon with oxygen-containing surface groups was studied using a conventional macroelectrode configuration with disc electrodes and the single particle microelectrode technique. The results of both experimental set-ups were compare taking into account the visible peaks of the surface groups, capacitance and Faradaic currents. Galvanostatic cycling and cyclic voltammetry performed at different potential windows clearly indicated that the microelectrode configuration was more sensitive to Faradic phenomena (i.e. oxygenated functional groups). The incorporation of mainly CO2-evolving groups after positive polarization may cause the degradation of the carbon material, leading to a distortion in its capacitive behaviour as a result of a restriction of the available surface area. | Descripción: | 6 pages, 7 figures.-- Printed version published Jul 1, 2008. | Versión del editor: | http://dx.doi.org/10.1016/j.jelechem.2008.02.028 | URI: | http://hdl.handle.net/10261/11732 | DOI: | 10.1016/j.jelechem.2008.02.028 | ISSN: | 1572-6657 |
Aparece en las colecciones: | (INCAR) Artículos |
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study_Faradaic_Ruiz.pdf | 236,51 kB | Adobe PDF | Visualizar/Abrir |
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