Collect. Czech. Chem. Commun.
2009, 74, 1517-1530
https://doi.org/10.1135/cccc2009073
Published online 2009-12-14 08:45:26
Adsorption of tert-butyl alcohol at the Hg|aqueous perchlorate interface in the presence of tetramethylthiourea
Dorota Gugała-Fekner*, Zygmunt Fekner, Jolanta Nieszporek, Dorota Sieńko and Jadwiga Saba
Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 3, 20-031 Lublin, Poland
Abstract
The electrosorption behavior of tert-butyl alcohol at the mercury|aqueous NaClO4– tetramethylthiourea was determined by a double layer differential capacity measurement. Adsorption of tert-butyl alcohol was analyzed using the constants obtained from the modified Flory–Huggins and virial isotherm. An increase in the relative surface excess for tert- butyl alcohol with increasing NaClO4 concentration in the range from 0.1 to 1.0 M was confirmed. The observed effect may be the result of the weakest repulsive interaction between adsorbed tert-butyl alcohol molecules in 1.0 M NaClO4 with 0.05 M tetramethylthiourea.
Keywords: Differential capacity; Adsorption isotherm; Electrostatic parameters; tert-Butyl alcohol; Tetramethylthiourea; Mercury electrode; Electrosorption; Electrochemistry.
References: 23 live references.
