Journal of The Electrochemical Society · 1987 · 14 citations · 0 references
Natural SciencesChemistryMaterials ScienceElectrochemistryInorganic ChemistrySurface ScienceElectrochemical KineticsElectrode KineticsElectrode MaterialsSurface AdsorptionSurface OxidationSurface ReactionsAdsorption On Oxide SurfacesAdsorption PhenomenaAluminaSurface Adsorption PhenomenaSurface Chemistry Of AluminaSurface CoverageSurface Coverage AnalysisVoltammetry
Very fast (>5 V/s) cyclic voltammetry measurements conducted on graphite in molten cryolite with alumina concentrations varying from 0.25 weight percent (w/o) to 5 w/o showed the presence of an anodic peak prior to the peak associated with formation. A corresponding reduction peak was observed in the cathodic branch, but the process was not reversible. These peaks were attributed to adsorption/desorption of oxygen forming a carbon‐oxygen surface compound. The surface coverage was of the order of a monolayer.