hrcak mascot   Srce   HID

Izvorni znanstveni članak

Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode

Jadwiga Saba ; Faculty of Chemistry, M. Curie-Sklodowska University, 20031 Lublin, Poland
Grażyna Dalmata ; Faculty of Chemistry, M. Curie-Sklodowska University, 20031 Lublin, Poland
Jolanta Nieszporek ; Faculty of Chemistry, M. Curie-Sklodowska University, 20031 Lublin, Poland
Jan Szaran ; Faculty of Chemistry, M. Curie-Sklodowska University, 20031 Lublin, Poland

Puni tekst: engleski, pdf (135 KB) str. 643-655 preuzimanja: 112* citiraj
APA 6th Edition
Saba, J., Dalmata, G., Nieszporek, J. i Szaran, J. (2000). Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode. Croatica Chemica Acta, 73 (3), 643-655. Preuzeto s https://hrcak.srce.hr/132007
MLA 8th Edition
Saba, Jadwiga, et al. "Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode." Croatica Chemica Acta, vol. 73, br. 3, 2000, str. 643-655. https://hrcak.srce.hr/132007. Citirano 23.09.2020.
Chicago 17th Edition
Saba, Jadwiga, Grażyna Dalmata, Jolanta Nieszporek i Jan Szaran. "Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode." Croatica Chemica Acta 73, br. 3 (2000): 643-655. https://hrcak.srce.hr/132007
Harvard
Saba, J., et al. (2000). 'Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode', Croatica Chemica Acta, 73(3), str. 643-655. Preuzeto s: https://hrcak.srce.hr/132007 (Datum pristupa: 23.09.2020.)
Vancouver
Saba J, Dalmata G, Nieszporek J, Szaran J. Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode. Croatica Chemica Acta [Internet]. 2000 [pristupljeno 23.09.2020.];73(3):643-655. Dostupno na: https://hrcak.srce.hr/132007
IEEE
J. Saba, G. Dalmata, J. Nieszporek i J. Szaran, "Properties of the Mixed Polyethyleneglycoles-iodide Ions Adsorption Layers on a Mercury Electrode", Croatica Chemica Acta, vol.73, br. 3, str. 643-655, 2000. [Online]. Dostupno na: https://hrcak.srce.hr/132007. [Citirano: 23.09.2020.]

Sažetak
Adsorption of a mixture of I- ions and polyethyleneglycoles of molecular weights 400 (PEG 400) and 10 000 (PEG 10 000) on a mercury electrode from NaClO4 solution of constant ionic strength is described. Parallel courses of linear dependences of the potential of zero charge with the increase of I- ion concentration in the Solutions with PEG and without PEG indicate removal of water molecules by adsorption of I- ions and not PEG molecules. The standard Gibbs energy of adsorption ΔadG° and parameter B obtained from the virial isotherm do not depend on PEG 10 000 concentration. This can be associated with the full coverage of the electrode surface with its molecules already at a concentration of 10-4 mol dm-3. For PEG 400, a dependence of adsorption parameters on its concentration was observed. Lower repulsive interaction between the adsorbed I- ion in PEG Solutions indicates a favourable effect of PEG molecules on I- ion adsorption compared with H2O. The values of rate constants ksapp of Zn2+ ion reduction as a piloting ion were determined. Acceleration of the processes inhibited by PEG 400 or PEG 10 000 by I- ions is based on formation of ion pairs Zn2+−I- on the mercury surface. Kinetic measurements con-firm stronger adsorption of PEG 10 000 compared with PEG 400.

Ključne riječi
electrochemistry; adsorption of I- ions; inhibition of Zn2+ reduction; coadsorption; mixed adsorption layers

Hrčak ID: 132007

URI
https://hrcak.srce.hr/132007

Posjeta: 205 *