Collect. Czech. Chem. Commun.
2000, 65, 371-379
https://doi.org/10.1135/cccc20000371
Fast Evaluation of Differential Capacity and Surface Charge in Electrical Double Layers with A.C. Oscillopolarography
Shuping Bia,*, Hong Gaoa, Wei Tanga, Zhiguo Yangb, Sidan Dub, Xiang Youb, Jiehui Wangb and Mingquan Zhangb
a Chemistry Department, Nanjing University, Nanjing, 210093, People's Republic of China
b Electronic Science and Engineering Department, Nanjing University, Nanjing, 210093, People's Republic of China
Abstract
The application of a.c. oscillopolarography for a fast evaluation of differential capacity and surface charge in electrical double layers on the mercury electrode is described. The Cd = f(E), Q = f(E) and γ = f(E) functions are displayed. The obtained values of differential capacity and surface charge densities are in agreement with those from the a.c. bridge method. The new method has the distinct advantages of a rapid analytical procedure, visual detection, very simple manipulation and low-cost instrumentation. It is very useful in practical analysis where accurate values of differential capacity and surface charge are not required.
Keywords: Polarography; Oscillopolarography; Mercury electrode; Electrochemistry.
References: 33 live references.
