A new insight into the mechanism of lead electrodeposition: Ohmic-diffusion control of the electrodeposition process
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2013
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Prikaz svih podataka o dokumentuApstrakt
A new insight into the mechanism of lead electrodeposition from nitrate solutions is presented by analysis of the polarization characteristics and by scanning electron microscopic (SEM) analysis of the surface morphology of the lead deposits obtained in the potentiostatic regime of electrolysis. In dependence on the concentration of Pb(II) ions, the electrodeposition process is either mixed ohmic-diffusion or completely ohmic controlled. The ratio of the ohmic control to the total control of the electrodeposition process increased with increasing concentration of Pb(II) ions and at the higher concentrations of Pb(II) ions, the electrodeposition process became completely ohmic controlled. The polarization characteristics were well correlated with the morphologies of the obtained lead deposits. The formation of regular crystals was a characteristic of ohmic control of the electrodeposition process, while needle-like and fern-like dendrites were the predominant morphological forms obtaine...d under diffusion control. The critical overpotentials for both dendritic growth initiation and instantaneous dendritic growth were analyzed and a mechanism of lead electrodeposition based on this analysis is presented. It was shown that the values of these critical overpotentials decreased and approached one another with increasing concentration of Pb(II) ions and finally became the same when full ohmic control was attained. The presented results were in good agreement with the predications of the general theory for the formation of disperse metal electrodeposits.
Ključne reči:
Electrodeposition / Lead / Powder / Dendrites / Scanning electron microscope (SEM)Izvor:
Journal of Electroanalytical Chemistry, 2013, 691, 66-76Izdavač:
- Elsevier
Finansiranje / projekti:
- Elektrohemijska sinteza i karakterizacija nanostrukturiranih funkcionalnih materijala za primenu u novim tehnologijama (RS-MESTD-Basic Research (BR or ON)-172046)
DOI: 10.1016/j.jelechem.2012.12.011
ISSN: 1572-6657
WoS: 000317455000009
Scopus: 2-s2.0-84873298703
Institucija/grupa
IHTMTY - JOUR AU - Nikolić, Nebojša D. AU - Popov, Konstantin I. AU - Živković, Predrag M. AU - Branković, Goran PY - 2013 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1223 AB - A new insight into the mechanism of lead electrodeposition from nitrate solutions is presented by analysis of the polarization characteristics and by scanning electron microscopic (SEM) analysis of the surface morphology of the lead deposits obtained in the potentiostatic regime of electrolysis. In dependence on the concentration of Pb(II) ions, the electrodeposition process is either mixed ohmic-diffusion or completely ohmic controlled. The ratio of the ohmic control to the total control of the electrodeposition process increased with increasing concentration of Pb(II) ions and at the higher concentrations of Pb(II) ions, the electrodeposition process became completely ohmic controlled. The polarization characteristics were well correlated with the morphologies of the obtained lead deposits. The formation of regular crystals was a characteristic of ohmic control of the electrodeposition process, while needle-like and fern-like dendrites were the predominant morphological forms obtained under diffusion control. The critical overpotentials for both dendritic growth initiation and instantaneous dendritic growth were analyzed and a mechanism of lead electrodeposition based on this analysis is presented. It was shown that the values of these critical overpotentials decreased and approached one another with increasing concentration of Pb(II) ions and finally became the same when full ohmic control was attained. The presented results were in good agreement with the predications of the general theory for the formation of disperse metal electrodeposits. PB - Elsevier T2 - Journal of Electroanalytical Chemistry T1 - A new insight into the mechanism of lead electrodeposition: Ohmic-diffusion control of the electrodeposition process VL - 691 SP - 66 EP - 76 DO - 10.1016/j.jelechem.2012.12.011 ER -
@article{ author = "Nikolić, Nebojša D. and Popov, Konstantin I. and Živković, Predrag M. and Branković, Goran", year = "2013", abstract = "A new insight into the mechanism of lead electrodeposition from nitrate solutions is presented by analysis of the polarization characteristics and by scanning electron microscopic (SEM) analysis of the surface morphology of the lead deposits obtained in the potentiostatic regime of electrolysis. In dependence on the concentration of Pb(II) ions, the electrodeposition process is either mixed ohmic-diffusion or completely ohmic controlled. The ratio of the ohmic control to the total control of the electrodeposition process increased with increasing concentration of Pb(II) ions and at the higher concentrations of Pb(II) ions, the electrodeposition process became completely ohmic controlled. The polarization characteristics were well correlated with the morphologies of the obtained lead deposits. The formation of regular crystals was a characteristic of ohmic control of the electrodeposition process, while needle-like and fern-like dendrites were the predominant morphological forms obtained under diffusion control. The critical overpotentials for both dendritic growth initiation and instantaneous dendritic growth were analyzed and a mechanism of lead electrodeposition based on this analysis is presented. It was shown that the values of these critical overpotentials decreased and approached one another with increasing concentration of Pb(II) ions and finally became the same when full ohmic control was attained. The presented results were in good agreement with the predications of the general theory for the formation of disperse metal electrodeposits.", publisher = "Elsevier", journal = "Journal of Electroanalytical Chemistry", title = "A new insight into the mechanism of lead electrodeposition: Ohmic-diffusion control of the electrodeposition process", volume = "691", pages = "66-76", doi = "10.1016/j.jelechem.2012.12.011" }
Nikolić, N. D., Popov, K. I., Živković, P. M.,& Branković, G.. (2013). A new insight into the mechanism of lead electrodeposition: Ohmic-diffusion control of the electrodeposition process. in Journal of Electroanalytical Chemistry Elsevier., 691, 66-76. https://doi.org/10.1016/j.jelechem.2012.12.011
Nikolić ND, Popov KI, Živković PM, Branković G. A new insight into the mechanism of lead electrodeposition: Ohmic-diffusion control of the electrodeposition process. in Journal of Electroanalytical Chemistry. 2013;691:66-76. doi:10.1016/j.jelechem.2012.12.011 .
Nikolić, Nebojša D., Popov, Konstantin I., Živković, Predrag M., Branković, Goran, "A new insight into the mechanism of lead electrodeposition: Ohmic-diffusion control of the electrodeposition process" in Journal of Electroanalytical Chemistry, 691 (2013):66-76, https://doi.org/10.1016/j.jelechem.2012.12.011 . .