The Effect of Weak Adsorption on the Double Layer Capacitance
Wolfgang Schmickler
Abstract
Abstract Motivated by recents results for the double‐layer on Pt(111), I reexamine the theory of weak adsorption on double‐layer properties, and use it to explore the capacitance at low electrolyte concentrations. Even a very weak adsorption enhances the double layer capacitance, so that it may exceed the value C GC predicted by Gouy‐Chapman theory. A Parsons‐Zobel plot of vs. for the experimental capacity C does not result in a straight line of unit slope, but roughly follows a linear relation with smaller slope. These results are in line with older data on Ag(111), and with the new data on Pt(111).
Topics & Concepts
CapacitanceDouble layer (biology)AdsorptionElectrolyteDouble-layer capacitanceLayer (electronics)Line (geometry)ChemistryMaterials scienceAnalytical Chemistry (journal)ThermodynamicsPhysicsElectrochemistryMathematicsPhysical chemistryChromatographyElectrodeNanotechnologyGeometryDielectric spectroscopySurface and Thin Film PhenomenaGraphene research and applicationsAdvancements in Battery Materials