Original scientific paper

Adsorption of N-Allylthiourea on a Mercury Electrode: Dependence on the Supporting Electrolyte Concentration

Grazyna Dalmata ; Faculty of Chemistry, Maria Curie-Sk³odowska Univeristy, Lublin, Poland
Agnieszka Nosal-Wierciñska ; Faculty of Chemistry, Maria Curie-Sk³odowska Univeristy, Lublin, Poland

Abstract

Adsorption of N-allylthiourea at the interface mercury/NaClO4 was studied as a function of
electrode charge density, adsorbate, and the supporting electrolyte bulk concentration. Experimental
data from measurements of the double layer differential capacity, zero charge potential,
and surface tension at the zero charge potential were used in the study. Information on N-allylthiourea
adsorption was obtained from the values of relative surface excess, free adsorption energy,
interaction constants and the electrostatic parameters of the inner layer. It was found that
the adsorption parameters change together with the change of the supporting electrolyte concentration,
which points to competitive adsorption of N-allylthiourea and ClO4
– ions.

Keywords

adsorption; N-allylthiourea; A C impedance; mercury-drop electrode; electrostatic parameters

Hrčak ID:

31179

URI

https://hrcak.srce.hr/31179

Publication date:

31.12.2008.

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