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An insight into Faradaic phenomena in activated carbon investigated by means of the microelectrode technique

AuthorsMalmberg, H.; Ruiz Ruiz, Vanesa ; Blanco Rodríguez, Clara ; Santamaría Ramírez, Ricardo ; Lundblad, A.; Björnbom, P.
KeywordsActivated Carbon
Oxygen surface groups
Issue Date30-Jun-2007
CitationElectrochemistry Communications 9(9): 2320-2324 (2007)
AbstractCyclic voltammetry was performed on activated carbon particles in a microelectrode setup to investigate the behaviour of an activated carbon with oxygen functionalities. Quinoid type redox peaks were clearly seen in the potential region around −0.5 V vs. Hg/HgO. After polarization below −0.4 V, an anodic peak confirms previous studies using a pristine carbon, but in the present work much higher in intensity. In addition, a corresponding cathodic peak, not previously reported, was also found. The appearance of this pair of peaks in a functionalized carbon may be connected to reversible hydrogen adsorption together with Faradaic reactions involving oxygenated functional groups.
Description5 pages, 4 figures, 1 table.-- Printed version published Sep 2007.
Publisher version (URL)http://dx.doi.org/10.1016/j.elecom.2007.06.029
Appears in Collections:(INCAR) Artículos
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