Publication
Title
Potentiodynamic EIS investigation of the 2-methyl-5-mercapto-1,2,4-thiadiazole adsorption on copper
Author
Abstract
The influence of the potential and polarization conditions on the adsorption kinetics and structure of 2-methyl-5-mercapto-1,3,4-thiadiazole on copper was investigated. The study was carried out by means of cyclic voltammetry, differential capacity, and potentiodynamic electrochemical impedance spectroscopy experiments. The total amount of deposited molecules suggested the formation of a dense organic layer. Several possible molecular adsorption geometries were established by considering some relevant quantum-chemical descriptors. Differentiation between them was performed by a derivation of the layer thickness from its capacitance. The latter was obtained by means of differential capacity and potentiodynamic electrochemical impedance spectroscopy measurements. It was shown that the application of potentiodynamic electrochemical impedance spectroscopy instead of differential capacity approach is beneficial in the case of complex or not purely capacitive systems. The results suggested that the polarization rate influenced significantly the morphology of the formed layers.
Language
English
Source (journal)
Electrochimica acta. - London
Publication
London : 2008
ISSN
0013-4686
Volume/pages
53:25(2008), p. 7451-7459
ISI
000259015300013
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 20.09.2013
Last edited 01.06.2017