The Electrochemical and Radiometric Study of Thiourea Adsorption on Polycrystalline Copper Electrode in Neutral Solution

• Autorzy: Łukomska A. , Sobkowski J.
• Języki publikacji: EN

Abstrakty

EN

Adsorption of thiourea (TU) on a polycrystalline copper electrode from 0.01 M NaClO4 solution has been studied by impedance spectroscopy and radiometric method. differential capacity of copper electrode in 0.01 M NaClO4 solution containing TU of concentrations from 10-6 to 5.10-4 M has been measured. The dependencies of the surface concentration of TU on the electrode potential and the bulk concentration were determined radiometrically. The adsorption of TU on the copper electrode was studied in the range of potentials where no faradaic currents occurred. In this range the process of adsorption is practically reversible with respect to the potential and the bulk concen tration of TU. The experimental data were described by the Langmuir and virial isotherms and the Gibbs energy of adsorption was calculated. In order to show the role of the metal the data of TU adsorption on different electrodes have been compared. The unusual behaviour of TU on Cu electrode in comparison with the urea was commented.

Słowa kluczowe

EN

adsorption; thiourea; copper electrode; radiometry; impedance spectroscopy

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2007
• Tom: Vol. 81, nr 12
• Strony: 2171--2180
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Łukomska A.

autor

Sobkowski J.

• Warsaw University, Chemistry Department, Żwirki i Wigury 101, 02-089 Warsaw, Poland,

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