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A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry

Valentin Mirčeski ; Ernst-Moritz-Arndt-Universität Greifswald, Institut für Chemie und Biochemie, Soldtmannstraße 23, D-17489 Greifswald, Germany
Rubin Gulaboski ; Ernst-Moritz-Arndt-Universität Greifswald, Institut für Chemie und Biochemie, Soldtmannstraße 23, D-17489 Greifswald, Germany

Puni tekst: engleski, pdf (163 KB) str. 37-48 preuzimanja: 501* citiraj
APA 6th Edition
Mirčeski, V. i Gulaboski, R. (2003). A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry. Croatica Chemica Acta, 76 (1), 37-48. Preuzeto s https://hrcak.srce.hr/103055
MLA 8th Edition
Mirčeski, Valentin i Rubin Gulaboski. "A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry." Croatica Chemica Acta, vol. 76, br. 1, 2003, str. 37-48. https://hrcak.srce.hr/103055. Citirano 08.03.2021.
Chicago 17th Edition
Mirčeski, Valentin i Rubin Gulaboski. "A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry." Croatica Chemica Acta 76, br. 1 (2003): 37-48. https://hrcak.srce.hr/103055
Harvard
Mirčeski, V., i Gulaboski, R. (2003). 'A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry', Croatica Chemica Acta, 76(1), str. 37-48. Preuzeto s: https://hrcak.srce.hr/103055 (Datum pristupa: 08.03.2021.)
Vancouver
Mirčeski V, Gulaboski R. A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry. Croatica Chemica Acta [Internet]. 2003 [pristupljeno 08.03.2021.];76(1):37-48. Dostupno na: https://hrcak.srce.hr/103055
IEEE
V. Mirčeski i R. Gulaboski, "A Theoretical and Experimental Study of a Two-step Quasireversible Surface Redox Reaction by Square-wave Voltammetry", Croatica Chemica Acta, vol.76, br. 1, str. 37-48, 2003. [Online]. Dostupno na: https://hrcak.srce.hr/103055. [Citirano: 08.03.2021.]

Sažetak
An extended theoretical treatment of a two-step surface redox reaction under the conditions of square-wave voltammetry (SWV) is presented. The theoretical model is applicable to any reversibility of both redox steps of the EE reaction. The integral equations representing this theoretical model were solved numerically. The apparent reversibility of the redox steps depends on two dimensionless kinetic parameters, κ1 and κ2, defined as κ1 = ks,1/f and κ2 = ks,2/f, where ks,1 and ks,2 are the standard rate constants of the first and second redox steps, respectively, and f is the excitation signal frequency. The response consists of either a single or two separate SW peaks, depending mainly on the difference between the formal potentials of the first and second redox steps as well as on the ratio of the kinetic parameters κ1/κ2. The effect of the electron transfer coefficients of both redox steps is also discussed. A part of the theoretical results are qualitatively illustrated by SW voltamograms of the azo-dye Sudan-III.

Ključne riječi
square-wave voltammetry; EE reaction; simulations; surface reactions; azo-dyes; Sudan-III

Hrčak ID: 103055

URI
https://hrcak.srce.hr/103055

Posjeta: 659 *