Estimation of the exchange current density and comparative analysis of morphology of electrochemically produced lead and zinc deposits
Apstrakt
The processes of lead and zinc electrodeposition from the very dilute electrolytes were compared by the analysis of polarization characteristics and by the scanning electron microscopic (SEM) analysis of the morphology of the deposits obtained in the galvanostatic regime of electrolysis. The exchange current densities for lead and zinc were estimated by comparison of experimentally obtained polarization curves with the simulated ones obtained for the different the exchange current density to the limiting diffusion current density ratios. Using this way for the estimation of the exchange current density, it is shown that the exchange current density for Pb was more than 1300 times higher than the one for Zn. In this way, it is confirmed that the Pb electrodeposition processes are considerably faster than the Zn electrodeposition processes. The difference in the rate of electrochemical processes was confirmed by a comparison of morphologies of lead and zinc deposits obtained at current d...ensities which corresponded to 0.25 and 0.50 values of the limiting diffusion current densities.
Ključne reči:
zinc / scanning electron microscope (SEM) / lead / exchange current density / electrodepositionIzvor:
Journal of the Serbian Chemical Society, 2017, 82, 5, 539-550Izdavač:
- Srpsko hemijsko društvo, Beograd
DOI: 10.2298/JSC161114029N
ISSN: 0352-5139
WoS: 000408085400006
Scopus: 2-s2.0-85021762542
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Nikolic, Nebojša D. AU - Živković, Predrag M. AU - Branković, Goran AU - Pavlović, Miomir G. PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1028 AB - The processes of lead and zinc electrodeposition from the very dilute electrolytes were compared by the analysis of polarization characteristics and by the scanning electron microscopic (SEM) analysis of the morphology of the deposits obtained in the galvanostatic regime of electrolysis. The exchange current densities for lead and zinc were estimated by comparison of experimentally obtained polarization curves with the simulated ones obtained for the different the exchange current density to the limiting diffusion current density ratios. Using this way for the estimation of the exchange current density, it is shown that the exchange current density for Pb was more than 1300 times higher than the one for Zn. In this way, it is confirmed that the Pb electrodeposition processes are considerably faster than the Zn electrodeposition processes. The difference in the rate of electrochemical processes was confirmed by a comparison of morphologies of lead and zinc deposits obtained at current densities which corresponded to 0.25 and 0.50 values of the limiting diffusion current densities. PB - Srpsko hemijsko društvo, Beograd T2 - Journal of the Serbian Chemical Society T1 - Estimation of the exchange current density and comparative analysis of morphology of electrochemically produced lead and zinc deposits EP - 550 IS - 5 SP - 539 VL - 82 DO - 10.2298/JSC161114029N ER -
@article{ author = "Nikolic, Nebojša D. and Živković, Predrag M. and Branković, Goran and Pavlović, Miomir G.", year = "2017", abstract = "The processes of lead and zinc electrodeposition from the very dilute electrolytes were compared by the analysis of polarization characteristics and by the scanning electron microscopic (SEM) analysis of the morphology of the deposits obtained in the galvanostatic regime of electrolysis. The exchange current densities for lead and zinc were estimated by comparison of experimentally obtained polarization curves with the simulated ones obtained for the different the exchange current density to the limiting diffusion current density ratios. Using this way for the estimation of the exchange current density, it is shown that the exchange current density for Pb was more than 1300 times higher than the one for Zn. In this way, it is confirmed that the Pb electrodeposition processes are considerably faster than the Zn electrodeposition processes. The difference in the rate of electrochemical processes was confirmed by a comparison of morphologies of lead and zinc deposits obtained at current densities which corresponded to 0.25 and 0.50 values of the limiting diffusion current densities.", publisher = "Srpsko hemijsko društvo, Beograd", journal = "Journal of the Serbian Chemical Society", title = "Estimation of the exchange current density and comparative analysis of morphology of electrochemically produced lead and zinc deposits", pages = "550-539", number = "5", volume = "82", doi = "10.2298/JSC161114029N" }
Nikolic, N. D., Živković, P. M., Branković, G.,& Pavlović, M. G.. (2017). Estimation of the exchange current density and comparative analysis of morphology of electrochemically produced lead and zinc deposits. in Journal of the Serbian Chemical Society Srpsko hemijsko društvo, Beograd., 82(5), 539-550. https://doi.org/10.2298/JSC161114029N
Nikolic ND, Živković PM, Branković G, Pavlović MG. Estimation of the exchange current density and comparative analysis of morphology of electrochemically produced lead and zinc deposits. in Journal of the Serbian Chemical Society. 2017;82(5):539-550. doi:10.2298/JSC161114029N .
Nikolic, Nebojša D., Živković, Predrag M., Branković, Goran, Pavlović, Miomir G., "Estimation of the exchange current density and comparative analysis of morphology of electrochemically produced lead and zinc deposits" in Journal of the Serbian Chemical Society, 82, no. 5 (2017):539-550, https://doi.org/10.2298/JSC161114029N . .