scholarly journals Electroreduction of Bi(III) Ions in the Aspect of Expanding the ”Cap – Pair” Effect

2020 ◽  
Author(s):  
Agnieszka Nosal Wiercińska ◽  
Sławomira Skrzypek
Keyword(s):  
Electrolyte Concentration ◽  
Supporting Electrolyte ◽  
Acceleration Process ◽  
Organic Substances ◽  
Effect Mechanism ◽  
Solution Interface

The paper discusses the electroreduction of Bi(III) ions in the aspect of expanding the ”cap – pair” effect. The ”cap – pair” rule is associated with the acceleration of the electrode’s processes by organic substances. The interpretation of the ”cap – pair” effect mechanism was expanded to include the effect of supporting electrolyte concentration on the acceleration process and the type of electrochemical active as well as used protonated organic substances. It has also been shown that the phenomena occurring at the electrode/solution interface can influence a change in the dynamics of the electrode’s process according to the ”cap – pair” rule.

scholarly journals Electroreduction of Bi(III) ions in the aspect of expanding the “cap-pair” effect: the role of the nanosized active complexes

2021 ◽  
Author(s):  
Agnieszka Nosal-Wiercińska ◽  
Marlena Martyna ◽  
Sławomira Skrzypek ◽  
Anna Szabelska ◽  
Małgorzata Wiśniewska
Keyword(s):  
Electrolyte Concentration ◽  
Supporting Electrolyte ◽  
Acceleration Process ◽  
Organic Substances ◽  
Effect Mechanism ◽  
Solution Interface

AbstractThe paper discusses the electroreduction of Bi(III) ions in the aspect of expanding the “cap-pair” effect.The “cap-pair” rule is associated with the acceleration of the electrode’s processes by organic substances. The interpretation of the “cap-pair” effect mechanism was expanded to include the effect of supporting electrolyte concentration on the acceleration process and the type of electrochemical active as well as used protonated organic substances. It has also been shown that the phenomena occurring at the electrode/solution interface can influence a change in the dynamics of the electrode’s process according to the “cap-pair” rule.

scholarly journals Adsorption of Selected Amino Acids at the Mercury/Aqueous Solution Interface from the Chlorate (VII) and Its Dependence on the Supporting Electrolyte Concentration

2015 ◽  
Vol 33 (6-8) ◽  
pp. 553-558 ◽  
Author(s):  
Agnieszka Nosal-Wiercińska ◽  
Mariusz Grochowski ◽  
Małgorzata Wiśniewska ◽  
Katarzyna Tyszczuk-Rotko ◽  
Selehattin Yilmaz ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Amino Acids ◽  
Electrolyte Concentration ◽  
Supporting Electrolyte ◽  
Solution Interface

Cyclic Voltammetry of Iodine at the Organic Liquid/Aqueous Solution Interface

2007 ◽  
Vol 72 (7) ◽  
pp. 917-926 ◽  
Author(s):  
Shaoai Xie ◽  
Jinping Jia ◽  
Hong-Jin Chen
Keyword(s):  
Metal Ion ◽  
Composite Electrode ◽  
Polar Solvent ◽  
Electrochemical Reaction ◽  
Organic Liquid ◽  
Supporting Electrolyte ◽  
Cyclic Voltammetric ◽  
Solution Interface ◽  
Donor Solvent ◽  
Solvent Complex

The electrochemical behavior of iodine extracted with an organic solvent at the liquid/liquid interface was studied using a new composite electrode. The effects of various solvents and supporting electrolyte on the electrochemical reaction of iodine were analyzed by cyclic voltammetric curves. The formation of a polar solvent complex of iodine and a strong donor solvent in organic solution was comfirmed by UV-VIS spectra. A possible mechanism was suggested based on experiments. This method makes it possible to measure heavy metal ion in solution indirectly.

scholarly journals Comparative study of equilibrium characteristics of Cu|Cu(II), Cu(I), glycine system containing sulfate or perchlorate as a supporting electrolyte

Chemija ◽  
2019 ◽  
Vol 30 (4) ◽  
Author(s):  
Kazimieras Mikulskis ◽  
Stasė Kanapeckaitė ◽  
Arvydas Survila
Keyword(s):  
Experimental Data ◽  
Comparative Study ◽  
Supporting Electrolyte ◽  
Molar Fraction ◽  
Alkaline Media ◽  
Acid Media ◽  
Solution Interface ◽  
Proton Donors ◽  
Thermodynamic Probability ◽  
Cu Ions

The distribution of species in Cu(II)-glycine solutions, containing sulfate or perchlorate as a supporting electrolyte, is considered. Substantial differences are observed at pH < 4.5, where the molar fraction of monoligand complex (associate) CuSO4 reaches up to 20 percent of the total Cu(II) concentration. Cu(I)-containing species are generated at the Cu|solution interface. These are Cu+ aqua-complexes (acid media) or mono- and bidentate Cu(I)-glycine complexes (alkaline media). The addition of sulfate reduces the content of Cu+ ions, but practically does not affect the distribution of Cu(I) complexes. The study of acidbase equilibria involving Cu+ ions shows that the thermodynamic probability of Cu2O formation remains low in both perchlorate and sulfate media. HSO4– ions formed in acid media should be treated as rather labile proton donors. This is quantitatively confirmed by experimental data, according to which the rate of hydrogen evolution increases correspondingly when perchlorate is replaced by sulfate in glycine solutions.

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