An insight into Faradaic phenomena in activated carbon investigated by means of the microelectrode technique
2007 (English)In: Electrochemistry communications, ISSN 1388-2481, E-ISSN 1873-1902, Vol. 9, no 9, 2320-2324 p.Article in journal (Refereed) Published
Cyclic 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.
Place, publisher, year, edition, pages
2007. Vol. 9, no 9, 2320-2324 p.
activated carbon, microelectrode, oxygen surface groups, quinone/hydroquinone, transport properties, nanoporous carbon, hydrogen storage, supercapacitors
IdentifiersURN: urn:nbn:se:kth:diva-16989DOI: 10.1016/j.elecom.2007.06.029ISI: 000249798600031ScopusID: 2-s2.0-34547953319OAI: oai:DiVA.org:kth-16989DiVA: diva2:335032
QC 201008092010-08-052010-08-052010-08-09Bibliographically approved