On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions
Апстракт
The kinetics and mechanism of the hydrogen evolution reaction (her) were studied on zinc in 1.0 mol dm-3 Na2SO4 at 298 K, in the pH range 4.4 - 10. It was found that a combination of classical potentiostatic steady-state voltammetry (PSV) and electrochemical impedance spectroscopy (EIS) can help to elucidate dilemmas concerning the mechanism of this reaction. Thus, over the whole potential region, the reaction path of the her on zinc cannot be presented by the classical Volmer-Tafel-Heyrovsky route. It was found that the very complex S-shape of the polarization curves could be explained by two parallel reaction mechanisms for the her. The first reaction mechanism is a consecutive combination of three steps, in which the surface zinc oxide plays an active role in the her, and second reaction mechanism is a consecutive combination of a Volmer step, followed by a Heyrovsky step. The second mechanism is dominant in the more negative potential region where the active sites for the her are m...etallic zinc.
Кључне речи:
hydrogen evolution reaction / zinc electrode / sulfate solution / spectroscopy of electrochemical impedance / mechanism / NLS fitting / rate constantsИзвор:
Journal of the Serbian Chemical Society, 2001, 66, 11-12, 811-823Издавач:
- Belgrade : Serbian Chemical Society
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Trišović, Tomislav AU - Gajić Krstajić, Ljiljana AU - Krstajić, Nedeljko AU - Vojnović, Milan PY - 2001 UR - https://dais.sanu.ac.rs/123456789/286 AB - The kinetics and mechanism of the hydrogen evolution reaction (her) were studied on zinc in 1.0 mol dm-3 Na2SO4 at 298 K, in the pH range 4.4 - 10. It was found that a combination of classical potentiostatic steady-state voltammetry (PSV) and electrochemical impedance spectroscopy (EIS) can help to elucidate dilemmas concerning the mechanism of this reaction. Thus, over the whole potential region, the reaction path of the her on zinc cannot be presented by the classical Volmer-Tafel-Heyrovsky route. It was found that the very complex S-shape of the polarization curves could be explained by two parallel reaction mechanisms for the her. The first reaction mechanism is a consecutive combination of three steps, in which the surface zinc oxide plays an active role in the her, and second reaction mechanism is a consecutive combination of a Volmer step, followed by a Heyrovsky step. The second mechanism is dominant in the more negative potential region where the active sites for the her are metallic zinc. PB - Belgrade : Serbian Chemical Society T2 - Journal of the Serbian Chemical Society T1 - On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions SP - 811 EP - 823 VL - 66 IS - 11-12 UR - https://hdl.handle.net/21.15107/rcub_dais_286 ER -
@article{ author = "Trišović, Tomislav and Gajić Krstajić, Ljiljana and Krstajić, Nedeljko and Vojnović, Milan", year = "2001", abstract = "The kinetics and mechanism of the hydrogen evolution reaction (her) were studied on zinc in 1.0 mol dm-3 Na2SO4 at 298 K, in the pH range 4.4 - 10. It was found that a combination of classical potentiostatic steady-state voltammetry (PSV) and electrochemical impedance spectroscopy (EIS) can help to elucidate dilemmas concerning the mechanism of this reaction. Thus, over the whole potential region, the reaction path of the her on zinc cannot be presented by the classical Volmer-Tafel-Heyrovsky route. It was found that the very complex S-shape of the polarization curves could be explained by two parallel reaction mechanisms for the her. The first reaction mechanism is a consecutive combination of three steps, in which the surface zinc oxide plays an active role in the her, and second reaction mechanism is a consecutive combination of a Volmer step, followed by a Heyrovsky step. The second mechanism is dominant in the more negative potential region where the active sites for the her are metallic zinc.", publisher = "Belgrade : Serbian Chemical Society", journal = "Journal of the Serbian Chemical Society", title = "On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions", pages = "811-823", volume = "66", number = "11-12", url = "https://hdl.handle.net/21.15107/rcub_dais_286" }
Trišović, T., Gajić Krstajić, L., Krstajić, N.,& Vojnović, M.. (2001). On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions. in Journal of the Serbian Chemical Society Belgrade : Serbian Chemical Society., 66(11-12), 811-823. https://hdl.handle.net/21.15107/rcub_dais_286
Trišović T, Gajić Krstajić L, Krstajić N, Vojnović M. On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions. in Journal of the Serbian Chemical Society. 2001;66(11-12):811-823. https://hdl.handle.net/21.15107/rcub_dais_286 .
Trišović, Tomislav, Gajić Krstajić, Ljiljana, Krstajić, Nedeljko, Vojnović, Milan, "On the kinetics of the hydrogen evolution reaction on zinc in sulfate solutions" in Journal of the Serbian Chemical Society, 66, no. 11-12 (2001):811-823, https://hdl.handle.net/21.15107/rcub_dais_286 .