Electrical double layer properties

Lead, electrical double layer properties, tabulated, 96... 

Davis, J. A., James, R. O. and Leckie, J. O. (1978). Surface ionization and complexation at the oxide/water interface. I. Computation of electrical double layer properties in simple electrolytes, J. Coll. Inter/. Sci., 63, 480-499. 

Harding, I. H., and T. W. Healy (1985), "Electrical Double Layer Properties of Amphoteric Polymer Latex Colloids", J. Coll. Interf. Sd. 107, 382-397. 

From the preceding contributions in this volume it is evident that the techniques of modelling the electrical double layer properties at the oxide/electrolyte interface have been well developed (2, 11). However, the problem still contains a certain amount of " art form in the sense that there is more than one school of thought as to how the various modelling techniques should be applied. 

Electrical double layer properties at the solid/electrolyte solution interface were analyzed by potentiometric titration and electrophoresis measurements. Potentiometric titration and electrokinetic measurements were performed for three different concentrations 1 x 10 3, 1 x 10 2, and 1 x 10 1 M of NaClCXt solutions. The initial concentrations of Cd(II) and oxalate or citrate ions were 1 x 10 6, 1 x 105, 1 x 10 4, and 1 x 10 3 M, respectively. Double distilled water was used to prepare all solutions. All reagents used for experiments were analytical grade. 

J. A. Davies, R. O. James, and J. O. Leckie, Surface Ionization and Complexation at the Oxide/Water Interface. I. Computation of Electrical Double Layer Properties in Simple Electrolytes, J. Colloid Interface Sci. 63, 480-499 (1978). 

The composition of this chapter is based on a well-known and well-understood model of the electrical double layer and therefore does not pretend to enhance overall understanding. It does, however, aim to answer the question of whether a useful mathematical technique exists that may allow for a numerical, if not analytical, description of the double layer for a surface of arbitrary shape and topography. It is fair to say that the colloid scientist ultimately seeks a quantitative description of the electrical double layer for whatever reason. The task then now faced is to uncover the most appropriate theoretical method of calculating the electrical double layer properties for a given nonideal situation. Here we suggest a few methods that may help in this respect. 

Computation of electrical double layer properties in simple electrolytes. J. Coll. Interface Sci. (3), 480-499 (1978). 

This section will focus mainly on characterization of the physical nature of the dispersed phase or its size distribution. Electrokinetic characterization techniques, which determine the electric double-layer properties of the dispersed phase, will be only briefly mentioned. Again, electrokinetic properties, their significance, and their measurement have been covered in review articles 44, 45). 

Lyons, J.S., Furlong, D.N., and Healy, T.W.. The electrical double-layer properties of the mica (muscovite)-aqueous electrolyte interface, Aust. J. Chem., 34, 1177, 1981. 

An example of the effects of the stabihty of carbon chemistry is its impact on the electrochemical performance of carbon electrodes, which is altered by the presence of surface groups [1-3]. Now that the use of carbons as supercapacitors for energy storage has begun to attract interest [4-6], some attention has been devoted to the influence of the surface chemistry of these materials on their capacitance. It was found that surface functionality has a tremendous effect on the electrical double-layer properties and the capacity of the latter for energy storage [7-9]. 

The method developed here for the description of chemical equilibria including adsorption on charged surfaces was applied to interpret phosphate adsorption on iron oxide (9), and to study electrical double-layer properties in simple electrolytes (6), and adsorption of metal ions on iron oxide (10). The mathematical formulation was combined with a procedure for determining constants from experimental data in a comparison of four different models for the surface/solution interface a constant-capacitance double-layer model, a diffuse double-layer model, the triplelayer model described here, and the Stem model (11). The reader is referred to the Literature Cited for an elaboration on the applications. 

D. E. Yates, S. Levine, and T. W. Healy, Site-binding model of the electrical double layer at the oxide/water interface, J.C.S. Faraday I 70 1807 (1974). J. A. Davis, R. O. James, and J. O. Leckie, Surface ionization and complexation at the oxide/water interface. I Computation of electrical double layer properties in simple electrolytes, J. Colloid Interface Sci. 63 480 (1978). J. A. Davis and J. O. Leckie, Surface ionization and complexation at the oxide/water interface. II Surface properties of amorphous iron oxyhydroxide and adsorption of metal ions, J, Colloid Interface Sci, 67 90 (1978). 3 Adsorption of anions, J. Colloid Interface Sci. 74 32 (1980). 

Yoshida, A., I. Tanahashi, and A. Nishino. 1990. Effect of concentration of surface acidic functional groups on electric double-layer properties of activated carbon fibers. Carbon 28 611-615. 

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