Abstract
Interfacial tension was used to study the electrochemical properties of the interface between LiCl in water and tetraalkylammonium tetraphenylborate in 1,2-dichloroethane. The interfacial tension decrease with decreasing of the size of the cation of the organic supporting electrolyte on the order TBA + < THA + < THpA + < TOA +. The decrease of interfacial tension is also observed at the electrocapillary maximum the potential of which (potential of zero charge) shift towards more positive values in the order TBA + > THA + > THpA + > TOA +. This fact maybe an evidence that there is an increase of adsorption when the alkyl chain length of the organic cation is reduced.
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