Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements

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Title:Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements
Creators:
Kakiuchi, Takashi
Senda, Mitsugi
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 56, 1, pp. 112-129

Abstract

We have estimated the degree of polarizability of a polarized oil-water interface used as a working interface and that of the nonpolarizability of a nonpolarized interface used as a reference oil-water interface from the numerical calculation of dc and ac current vs potential behavior at both interfaces. Theoretical equations of dc and ac currents for simultaneous cation and anion transfer of supporting electrolytes have been derived for the planar stationary interface for reversible and quasi-reversible cases. In the derivation, the migration effect and the coupling of the cation and anion transfer have been incorporated. The transfer of ions constituting a supporting electrolyte contributes to the total admittance of the interface even in the region where the interface may be considered as polarized in dc sense, as pointed out first by Samec et al. (<i>J. Electroanal. Chem. 126</i>, 121 (1981)). Moreover, the reference oil-water interface is not ideally reversible, so that the contribution from this interface to the measured admittance cannot be negligible, unless the area of the reference oil-water interface is much larger than that of the working oil-water interface. The effect of non-ideality of the reference oil-water interface on the determination of double layer capacitances and kinetic parameters of charge transfer at the working oil-water interface has been estimated.

Title:Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements
Creators:
Kakiuchi, Takashi
Senda, Mitsugi
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:56
Number:1
Page Range:pp. 112-129
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19910112UNSPECIFIED
ID Code:4930
Item Type:Article
Deposited On:22 Feb 2010 11:26
Last Modified:22 Feb 2010 10:27

Citation

Kakiuchi, Takashi; Senda, Mitsugi (1991) Polarizability and nonpolarizability of oil-water interfaces with relevance to a.c. impendance measurements. Collection of Czechoslovak Chemical Communications, 56 (1). pp. 112-129. ISSN 0010-0765

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