Surface phase capacity determination methods

An alternative method of determining the surface phase capacity of heterogeneous surfaces has been proposed by Dabrowski and Jaroniec. " ... 

Various methods have been employed for the determination of E of liquid and solid metals. Besides purely electrochemical ones (e.g. measurement of the differential double layer capacity (see also chapter 4.2)) further techniques have been used for the investigation of the surface tension at the solid/electrolyte solution phase boundary. The employed methods can be grouped into several families based on the meas-... 

When solid particles are immersed in liquid medium, solid-liquid interfacial interactions will cause the formation of an adsorption layer on their surface. The material content of the adsorption layer is the adsorption capacity of the solid adsorbent, which may be determined in binary hquid mixtures if the so-called adsorption excess isotherm is known. Due to adsorption, the initial composition of the hquid mixture, x , changes to the equilibrium concentration Xj, where n = n +rf2, the mass content of the interfacial phase (e.g., mmol/g). This change, Xj — Xj = Axj, can be determined by simple analytical methods. The relationship between the reduced adsorption excess amount calculated from the change in concentration, = n°(x — xj), and the material content of the interfacial layer is given by the Ostwald-de Izaguirre equation [1-5]. In the case of purely physical adsorption of binary mixtures, the material content of the adsorption layer ( = — n) for component 1 is... 

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