TY  - JOUR
AU  - Stanković, Slavka
AU  - Grgur, Branimir
AU  - Krstajić, Nedeljko V.
AU  - Vojnović, Milan
PY  - 2003
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/522
AB  - Polarization curves of the hydrogen evolution reaction on zinc were obtained in Ethylenediaminetetraacetic acid (EDTA) solutions of different total molar concentrations (0.05, 0.10, 0.15 and 0.20 mol dm(-3)), the pH values of which were systematically varied (pH 3.0-10.0). The Tafel slopes of the cathodic polarization curves are -120 to -145 mV dec(-1) at lower currents densities (approximately 10(-5) -5x10(-4) A cm(-2)), while the higher current densities (approximately 5x10(-4)-10(-4) A cm(-2)) the slopes are in the range -190 to -370 mV dec(-1). The apparent cathodic reaction orders with respect to the hydrogen ions and EDTA, which were obtained from the cathodic polarization curves at the lower current densities, are z(-)(H+) congruent to 1/2 and z(-)(H4Y) congruent to 1, respectively. On the basis of these results, a mechanism of the hydrogen evolution reaction on zinc in the EDTA solutions examined, where protonated EDTA species (the protonated EDTA anions and the acid itself) participate directly as reactants is proposed. The unusual polarization behavior of the zinc electrode in the higher current density range is discussed.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - The kinetics of the hydrogen evolution reaction on zinc in EDTA solutions in the pH 3-10 range
EP  - 47
SP  - 37
VL  - 549
DO  - 10.1016/S0022-0728(03)00247-X
ER  - 

@article{
author = "Stanković, Slavka and Grgur, Branimir and Krstajić, Nedeljko V. and Vojnović, Milan",
year = "2003",
abstract = "Polarization curves of the hydrogen evolution reaction on zinc were obtained in Ethylenediaminetetraacetic acid (EDTA) solutions of different total molar concentrations (0.05, 0.10, 0.15 and 0.20 mol dm(-3)), the pH values of which were systematically varied (pH 3.0-10.0). The Tafel slopes of the cathodic polarization curves are -120 to -145 mV dec(-1) at lower currents densities (approximately 10(-5) -5x10(-4) A cm(-2)), while the higher current densities (approximately 5x10(-4)-10(-4) A cm(-2)) the slopes are in the range -190 to -370 mV dec(-1). The apparent cathodic reaction orders with respect to the hydrogen ions and EDTA, which were obtained from the cathodic polarization curves at the lower current densities, are z(-)(H+) congruent to 1/2 and z(-)(H4Y) congruent to 1, respectively. On the basis of these results, a mechanism of the hydrogen evolution reaction on zinc in the EDTA solutions examined, where protonated EDTA species (the protonated EDTA anions and the acid itself) participate directly as reactants is proposed. The unusual polarization behavior of the zinc electrode in the higher current density range is discussed.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "The kinetics of the hydrogen evolution reaction on zinc in EDTA solutions in the pH 3-10 range",
pages = "47-37",
volume = "549",
doi = "10.1016/S0022-0728(03)00247-X"
}

Stanković, S., Grgur, B., Krstajić, N. V.,& Vojnović, M.. (2003). The kinetics of the hydrogen evolution reaction on zinc in EDTA solutions in the pH 3-10 range. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 549, 37-47.
https://doi.org/10.1016/S0022-0728(03)00247-X

Stanković S, Grgur B, Krstajić NV, Vojnović M. The kinetics of the hydrogen evolution reaction on zinc in EDTA solutions in the pH 3-10 range. in Journal of Electroanalytical Chemistry. 2003;549:37-47.
doi:10.1016/S0022-0728(03)00247-X .

Stanković, Slavka, Grgur, Branimir, Krstajić, Nedeljko V., Vojnović, Milan, "The kinetics of the hydrogen evolution reaction on zinc in EDTA solutions in the pH 3-10 range" in Journal of Electroanalytical Chemistry, 549 (2003):37-47,
https://doi.org/10.1016/S0022-0728(03)00247-X . .

TY  - JOUR
AU  - Stanković, Slavka
AU  - Grgur, Branimir
AU  - Jović, Borka
AU  - Krstajić, Nedeljko V.
AU  - Pavlović, Olivera
AU  - Vojnović, Milan
PY  - 2002
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/413
AB  - An attempt was made to investigate the mechanism and kinetics of hydrogen evolution reaction on zinc and platinum wire electrodes from solutions containing ethylene diamine tetraacetic acid (EDTA). EDTA is a tetra-basic acid whose dissociation covers a wide range of pH, with a betaine structure in solutions. Introduction of EDTA into the solution provided several species whose dissociative hydrogen could be a source of h.e.r. The effect of EDTA concentration and pH on the Tafel dependence of cathode process was studied by galvanostatic method and cyclic voltametry. The aim was to establish the effect of EDTA on hydrogen evolution at the electrodes, i.e. whether evolution of hydrogen proceeds via hydronium ions arising from dissociation of EDTA, EDTA anions or hydrogen atoms transferred to the metal from EDTA molecules, as well as the impact of the Rowland effect on h.e.r.
PB  - 4th Conference of the Yugoslav Materials Research Society
T2  - Materials Science Forum
T1  - Hydrogen evolution reaction from EDTA solutions
EP  - 190
SP  - 185
VL  - 413
UR  - https://hdl.handle.net/21.15107/rcub_technorep_413
ER  - 

@article{
author = "Stanković, Slavka and Grgur, Branimir and Jović, Borka and Krstajić, Nedeljko V. and Pavlović, Olivera and Vojnović, Milan",
year = "2002",
abstract = "An attempt was made to investigate the mechanism and kinetics of hydrogen evolution reaction on zinc and platinum wire electrodes from solutions containing ethylene diamine tetraacetic acid (EDTA). EDTA is a tetra-basic acid whose dissociation covers a wide range of pH, with a betaine structure in solutions. Introduction of EDTA into the solution provided several species whose dissociative hydrogen could be a source of h.e.r. The effect of EDTA concentration and pH on the Tafel dependence of cathode process was studied by galvanostatic method and cyclic voltametry. The aim was to establish the effect of EDTA on hydrogen evolution at the electrodes, i.e. whether evolution of hydrogen proceeds via hydronium ions arising from dissociation of EDTA, EDTA anions or hydrogen atoms transferred to the metal from EDTA molecules, as well as the impact of the Rowland effect on h.e.r.",
publisher = "4th Conference of the Yugoslav Materials Research Society",
journal = "Materials Science Forum",
title = "Hydrogen evolution reaction from EDTA solutions",
pages = "190-185",
volume = "413",
url = "https://hdl.handle.net/21.15107/rcub_technorep_413"
}

Stanković, S., Grgur, B., Jović, B., Krstajić, N. V., Pavlović, O.,& Vojnović, M.. (2002). Hydrogen evolution reaction from EDTA solutions. in Materials Science Forum
4th Conference of the Yugoslav Materials Research Society., 413, 185-190.
https://hdl.handle.net/21.15107/rcub_technorep_413

Stanković S, Grgur B, Jović B, Krstajić NV, Pavlović O, Vojnović M. Hydrogen evolution reaction from EDTA solutions. in Materials Science Forum. 2002;413:185-190.
https://hdl.handle.net/21.15107/rcub_technorep_413 .

Stanković, Slavka, Grgur, Branimir, Jović, Borka, Krstajić, Nedeljko V., Pavlović, Olivera, Vojnović, Milan, "Hydrogen evolution reaction from EDTA solutions" in Materials Science Forum, 413 (2002):185-190,
https://hdl.handle.net/21.15107/rcub_technorep_413 .

TY  - JOUR
AU  - Krstajić, Nedeljko
AU  - Popović, Milica
AU  - Grgur, Branimir
AU  - Vojnović, Milan
AU  - Šepa, Darko
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/368
AB  - The mechanism and kinetics of the hydrogen evolution reaction (her) were studied in 1.0 mol dm(-3) NaOH at 393.0 K. It was found that a combination of classical steady-state voltammetry and impedance spectroscopy can help to elucidate dilemmas concerning the role of the Heyrovsky and Tafel steps in the mechanism of this reaction. Thus, within the potential region - 0.95  gt  E  gt  - 1.1 V (SHE) (curvilinear part of the polarization curve) the mechanism of the her is a consecutive combination of the Volmer step, followed dominantly by a rate controlling Tafel step, while the contribution of the parallel Heyrovsky step is negligible. At potentials E  lt  (approximately - 1.2 V) a Tafel line with a slope of - 0.121 V dec(-1) is obtained, with almost full coverage by H-ads ( lt theta gt (H) -- gt 1). In this potential region the mechanism of the her is a consecutive combination of a Volmer step, followed by a Heyrovsky step, while the contribution of the Tafel step is negligible. The comparison of the calculated partial rate constants for these two steps shows that the rate of the her is controlled by the Heyrovsky step.
PB  - Elsevier S.A.
T2  - Journal of Electroanalytical Chemistry
T1  - On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part I. The mechanism
EP  - 26
IS  - 1-2
SP  - 16
VL  - 512
DO  - 10.1016/S0022-0728(01)00590-3
ER  - 

@article{
author = "Krstajić, Nedeljko and Popović, Milica and Grgur, Branimir and Vojnović, Milan and Šepa, Darko",
year = "2001",
abstract = "The mechanism and kinetics of the hydrogen evolution reaction (her) were studied in 1.0 mol dm(-3) NaOH at 393.0 K. It was found that a combination of classical steady-state voltammetry and impedance spectroscopy can help to elucidate dilemmas concerning the role of the Heyrovsky and Tafel steps in the mechanism of this reaction. Thus, within the potential region - 0.95  gt  E  gt  - 1.1 V (SHE) (curvilinear part of the polarization curve) the mechanism of the her is a consecutive combination of the Volmer step, followed dominantly by a rate controlling Tafel step, while the contribution of the parallel Heyrovsky step is negligible. At potentials E  lt  (approximately - 1.2 V) a Tafel line with a slope of - 0.121 V dec(-1) is obtained, with almost full coverage by H-ads ( lt theta gt (H) -- gt 1). In this potential region the mechanism of the her is a consecutive combination of a Volmer step, followed by a Heyrovsky step, while the contribution of the Tafel step is negligible. The comparison of the calculated partial rate constants for these two steps shows that the rate of the her is controlled by the Heyrovsky step.",
publisher = "Elsevier S.A.",
journal = "Journal of Electroanalytical Chemistry",
title = "On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part I. The mechanism",
pages = "26-16",
number = "1-2",
volume = "512",
doi = "10.1016/S0022-0728(01)00590-3"
}

Krstajić, N., Popović, M., Grgur, B., Vojnović, M.,& Šepa, D.. (2001). On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part I. The mechanism. in Journal of Electroanalytical Chemistry
Elsevier S.A.., 512(1-2), 16-26.
https://doi.org/10.1016/S0022-0728(01)00590-3

Krstajić N, Popović M, Grgur B, Vojnović M, Šepa D. On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part I. The mechanism. in Journal of Electroanalytical Chemistry. 2001;512(1-2):16-26.
doi:10.1016/S0022-0728(01)00590-3 .

Krstajić, Nedeljko, Popović, Milica, Grgur, Branimir, Vojnović, Milan, Šepa, Darko, "On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part I. The mechanism" in Journal of Electroanalytical Chemistry, 512, no. 1-2 (2001):16-26,
https://doi.org/10.1016/S0022-0728(01)00590-3 . .

TY  - JOUR
AU  - Krstajić, Nedeljko
AU  - Popović, Milica
AU  - Grgur, Branimir
AU  - Vojnović, Milan
AU  - Šepa, Darko
PY  - 2001
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/376
AB  - The effect of temperature on the kinetics of the hydrogen evolution reaction (her) on nickel in 1.0 mol dm (-3) NaOH solution was studied. In this article, four sets of experiments were done in a non-isothermal cell. In all experiments only the compartment of the Ni working electrode was thermostated at 278.5, 303.0, 313.0 and 323.0 K, while the reference electrode (Hg \ HgO) was held constantly at 298.0 K. It was found that the transfer coefficient, alpha decreased with temperature. Using the calculated chemical rate constants and the corresponding partial standard rate constants for the Volmer, Heyrovsky and Tafel steps in both directions and the corresponding Arrhenius relationship, the chemical enthalpies of activation and the corresponding pre-exponential factors were determined. It was demonstrated that the limiting current for the her at potentials more negative than - 1.6 V occurs because the her takes place as an activationless process.
PB  - Elsevier S.A.
T2  - Journal of Electroanalytical Chemistry
T1  - On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part II. Effect of temperature
EP  - 35
IS  - 1-2
SP  - 27
VL  - 512
DO  - 10.1016/S0022-0728(01)00591-5
ER  - 

@article{
author = "Krstajić, Nedeljko and Popović, Milica and Grgur, Branimir and Vojnović, Milan and Šepa, Darko",
year = "2001",
abstract = "The effect of temperature on the kinetics of the hydrogen evolution reaction (her) on nickel in 1.0 mol dm (-3) NaOH solution was studied. In this article, four sets of experiments were done in a non-isothermal cell. In all experiments only the compartment of the Ni working electrode was thermostated at 278.5, 303.0, 313.0 and 323.0 K, while the reference electrode (Hg \ HgO) was held constantly at 298.0 K. It was found that the transfer coefficient, alpha decreased with temperature. Using the calculated chemical rate constants and the corresponding partial standard rate constants for the Volmer, Heyrovsky and Tafel steps in both directions and the corresponding Arrhenius relationship, the chemical enthalpies of activation and the corresponding pre-exponential factors were determined. It was demonstrated that the limiting current for the her at potentials more negative than - 1.6 V occurs because the her takes place as an activationless process.",
publisher = "Elsevier S.A.",
journal = "Journal of Electroanalytical Chemistry",
title = "On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part II. Effect of temperature",
pages = "35-27",
number = "1-2",
volume = "512",
doi = "10.1016/S0022-0728(01)00591-5"
}

Krstajić, N., Popović, M., Grgur, B., Vojnović, M.,& Šepa, D.. (2001). On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part II. Effect of temperature. in Journal of Electroanalytical Chemistry
Elsevier S.A.., 512(1-2), 27-35.
https://doi.org/10.1016/S0022-0728(01)00591-5

Krstajić N, Popović M, Grgur B, Vojnović M, Šepa D. On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part II. Effect of temperature. in Journal of Electroanalytical Chemistry. 2001;512(1-2):27-35.
doi:10.1016/S0022-0728(01)00591-5 .

Krstajić, Nedeljko, Popović, Milica, Grgur, Branimir, Vojnović, Milan, Šepa, Darko, "On the kinetics of the hydrogen evolution reaction on nickel in alkaline solution - Part II. Effect of temperature" in Journal of Electroanalytical Chemistry, 512, no. 1-2 (2001):27-35,
https://doi.org/10.1016/S0022-0728(01)00591-5 . .