The kinetics of the hydrogen evolution reaction on zinc in EDTA solutions in the pH 3-10 range
Само за регистроване кориснике
2003
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
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) pa...rticipate directly as reactants is proposed. The unusual polarization behavior of the zinc electrode in the higher current density range is discussed.
Кључне речи:
zinc / EDTA / hydrogen evolution reaction / kinetics / mechanismИзвор:
Journal of Electroanalytical Chemistry, 2003, 549, 37-47Издавач:
- Elsevier Science Sa, Lausanne
DOI: 10.1016/S0022-0728(03)00247-X
ISSN: 1572-6657
WoS: 000183792100004
Scopus: 2-s2.0-0037671360
Институција/група
Tehnološko-metalurški fakultetTY - 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 . .