TY  - JOUR
AU  - Cvetković, Vesna S.
AU  - Vukicević, Nataša M.
AU  - Nikolic, Nebojša D.
AU  - Baščarević, Zvezdana
AU  - Barudzija, Tanja S.
AU  - Jovicević, Jovan N.
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1251
AB  - The processes of electrodeposition from magnesium nitrate hexahydrate melt by galvanostatic regime of electrolysis have been analyzed. The structure of the formed particles was examined by X-ray diffraction (XRD), which revealed formation of MgO/Mg(OH)(2) mixture by molten salt electrolysis. Morphologies of the produced deposits were characterized by scanning electron microscopy (SEM) technique. The flower-like forms constructed from very thin needles with sharp tips were predominately formed by electrodeposition at various current densities and with various amounts of electricity. Aside from that, holes formed from detached hydrogen bubbles of various shapes and sizes, from dish-like holes to those resulting in honeycomb-like structures were also observed. Mechanism of formation of the flower-like forms has been elucidated applying the general theory of disperse deposits formation which is based on the concept of local (spherical and cylindrical) diffusion fields. It is shown that the growth of the needles occurs under the conditions of predominant spherical diffusion control, while the contribution of the cylindrical diffusion to the final shapes was negligible. Comparison with morphologies of deposits obtained by electrodepositions from aqueous magnesium salt electrolytes was also made and discussed.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Electroanalytical Chemistry
T1  - A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields
EP  - 175
SP  - 168
VL  - 842
DO  - 10.1016/j.jelechem.2019.04.067
ER  - 

@article{
author = "Cvetković, Vesna S. and Vukicević, Nataša M. and Nikolic, Nebojša D. and Baščarević, Zvezdana and Barudzija, Tanja S. and Jovicević, Jovan N.",
year = "2019",
abstract = "The processes of electrodeposition from magnesium nitrate hexahydrate melt by galvanostatic regime of electrolysis have been analyzed. The structure of the formed particles was examined by X-ray diffraction (XRD), which revealed formation of MgO/Mg(OH)(2) mixture by molten salt electrolysis. Morphologies of the produced deposits were characterized by scanning electron microscopy (SEM) technique. The flower-like forms constructed from very thin needles with sharp tips were predominately formed by electrodeposition at various current densities and with various amounts of electricity. Aside from that, holes formed from detached hydrogen bubbles of various shapes and sizes, from dish-like holes to those resulting in honeycomb-like structures were also observed. Mechanism of formation of the flower-like forms has been elucidated applying the general theory of disperse deposits formation which is based on the concept of local (spherical and cylindrical) diffusion fields. It is shown that the growth of the needles occurs under the conditions of predominant spherical diffusion control, while the contribution of the cylindrical diffusion to the final shapes was negligible. Comparison with morphologies of deposits obtained by electrodepositions from aqueous magnesium salt electrolytes was also made and discussed.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields",
pages = "175-168",
volume = "842",
doi = "10.1016/j.jelechem.2019.04.067"
}

Cvetković, V. S., Vukicević, N. M., Nikolic, N. D., Baščarević, Z., Barudzija, T. S.,& Jovicević, J. N.. (2019). A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 842, 168-175.
https://doi.org/10.1016/j.jelechem.2019.04.067

Cvetković VS, Vukicević NM, Nikolic ND, Baščarević Z, Barudzija TS, Jovicević JN. A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields. in Journal of Electroanalytical Chemistry. 2019;842:168-175.
doi:10.1016/j.jelechem.2019.04.067 .

Cvetković, Vesna S., Vukicević, Nataša M., Nikolic, Nebojša D., Baščarević, Zvezdana, Barudzija, Tanja S., Jovicević, Jovan N., "A possible mechanism of formation of flower-like MgO/Mg(OH)(2) structures by galvanostatic molten salt electrolysis: The concept of local diffusion fields" in Journal of Electroanalytical Chemistry, 842 (2019):168-175,
https://doi.org/10.1016/j.jelechem.2019.04.067 . .

TY  - JOUR
AU  - Cvetković, Vesna S.
AU  - Vukicević, Nataša M.
AU  - Nikolic, Nebojša D.
AU  - Branković, Goran
AU  - Barudzija, Tanja S.
AU  - Jovicević, Jovan N.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1146
AB  - The processes of electrochemical deposition of magnesium oxide/hydroxide on glassy carbon (GC) electrode from magnesium nitrate hexahydrate melt have been investigated. A novel procedure predicting a possibility of direct formation of magnesium oxide during electrodeposition from the nitrate melt used is reported. XRD analysis of the obtained deposits showed the formation of magnesium oxide along with magnesium hydroxide. The electrodeposition of magnesium oxide/hydroxide commences in magnesium underpotential (UPD) and continues through the magnesium overpotential (OPD) region. Network of individual or intertwined very thin needles as well as those grouped in flower-like aggregates or honeycomb-like structures were formed in both magnesium UPD and OPD regions. Formation of the long needles was explained through theories of mechanisms of dendrite formation. Hydrogen evolution commences in the magnesium OPD region and increases with the applied overpotential. Holes observed in the deposit originated from the detached hydrogen bubbles. The number, shape and size of the hole strongly depended on both the applied cathodic potential and the hold time of electrodeposition. Magnesium oxides/hydroxides syntheses taking part simultaneously at various applied potentials are a result of reactions between magnesium cations and products of water and nitrate anions reduction processes. Chemical reactions responsible for direct formation of magnesium oxide observed are those of magnesium ions and oxygen ions, formed by nitrate reduction taking part in the close vicinity of the working electrode.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Electrochimica Acta
T1  - Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts
EP  - 502
SP  - 494
VL  - 268
DO  - 10.1016/j.electacta.2018.02.121
ER  - 

@article{
author = "Cvetković, Vesna S. and Vukicević, Nataša M. and Nikolic, Nebojša D. and Branković, Goran and Barudzija, Tanja S. and Jovicević, Jovan N.",
year = "2018",
abstract = "The processes of electrochemical deposition of magnesium oxide/hydroxide on glassy carbon (GC) electrode from magnesium nitrate hexahydrate melt have been investigated. A novel procedure predicting a possibility of direct formation of magnesium oxide during electrodeposition from the nitrate melt used is reported. XRD analysis of the obtained deposits showed the formation of magnesium oxide along with magnesium hydroxide. The electrodeposition of magnesium oxide/hydroxide commences in magnesium underpotential (UPD) and continues through the magnesium overpotential (OPD) region. Network of individual or intertwined very thin needles as well as those grouped in flower-like aggregates or honeycomb-like structures were formed in both magnesium UPD and OPD regions. Formation of the long needles was explained through theories of mechanisms of dendrite formation. Hydrogen evolution commences in the magnesium OPD region and increases with the applied overpotential. Holes observed in the deposit originated from the detached hydrogen bubbles. The number, shape and size of the hole strongly depended on both the applied cathodic potential and the hold time of electrodeposition. Magnesium oxides/hydroxides syntheses taking part simultaneously at various applied potentials are a result of reactions between magnesium cations and products of water and nitrate anions reduction processes. Chemical reactions responsible for direct formation of magnesium oxide observed are those of magnesium ions and oxygen ions, formed by nitrate reduction taking part in the close vicinity of the working electrode.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts",
pages = "502-494",
volume = "268",
doi = "10.1016/j.electacta.2018.02.121"
}

Cvetković, V. S., Vukicević, N. M., Nikolic, N. D., Branković, G., Barudzija, T. S.,& Jovicević, J. N.. (2018). Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts. in Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 268, 494-502.
https://doi.org/10.1016/j.electacta.2018.02.121

Cvetković VS, Vukicević NM, Nikolic ND, Branković G, Barudzija TS, Jovicević JN. Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts. in Electrochimica Acta. 2018;268:494-502.
doi:10.1016/j.electacta.2018.02.121 .

Cvetković, Vesna S., Vukicević, Nataša M., Nikolic, Nebojša D., Branković, Goran, Barudzija, Tanja S., Jovicević, Jovan N., "Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts" in Electrochimica Acta, 268 (2018):494-502,
https://doi.org/10.1016/j.electacta.2018.02.121 . .

TY  - JOUR
AU  - Vukicević, Nataša M.
AU  - Cvetković, Vesna S.
AU  - Nikolic, Nebojša D.
AU  - Branković, Goran
AU  - Barudzija, Tanja S.
AU  - Jovicević, Jovan N.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1121
AB  - Synthesis of the honeycomb-like MgO/Mg(OH)(2) structures, with controlled shape and size of holes, by the electrolysis from magnesium nitrate hexahydrate melt onto glassy carbon is presented. The honeycomb-like structures were made up of holes, formed from detached hydrogen bubbles, surrounded by walls, built up of thin intertwined needles. For the first time, it was shown that the honeycomb-like structures can be obtained by molten salt electrolysis and not exclusively by electrolysis from aqueous electrolytes. Analogies with the processes of the honeycomb-like metal structures formation from aqueous electrolytes are presented and discussed. Rules established for the formation of these structures from aqueous electrolytes, such as the increase of number of holes, the decrease of holes size and coalescence of neighbouring hydrogen bubbles observed with increasing cathodic potential, appeared to be valid for the electrolysis of the molten salt used.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Formation of the honeycomb-like MgO/Mg(OH)(2) structures with controlled shape and size of holes by molten salt electrolysis
EP  - 1362
IS  - 12
SP  - 1351
VL  - 83
DO  - 10.2298/JSC180913084V
ER  - 

@article{
author = "Vukicević, Nataša M. and Cvetković, Vesna S. and Nikolic, Nebojša D. and Branković, Goran and Barudzija, Tanja S. and Jovicević, Jovan N.",
year = "2018",
abstract = "Synthesis of the honeycomb-like MgO/Mg(OH)(2) structures, with controlled shape and size of holes, by the electrolysis from magnesium nitrate hexahydrate melt onto glassy carbon is presented. The honeycomb-like structures were made up of holes, formed from detached hydrogen bubbles, surrounded by walls, built up of thin intertwined needles. For the first time, it was shown that the honeycomb-like structures can be obtained by molten salt electrolysis and not exclusively by electrolysis from aqueous electrolytes. Analogies with the processes of the honeycomb-like metal structures formation from aqueous electrolytes are presented and discussed. Rules established for the formation of these structures from aqueous electrolytes, such as the increase of number of holes, the decrease of holes size and coalescence of neighbouring hydrogen bubbles observed with increasing cathodic potential, appeared to be valid for the electrolysis of the molten salt used.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Formation of the honeycomb-like MgO/Mg(OH)(2) structures with controlled shape and size of holes by molten salt electrolysis",
pages = "1362-1351",
number = "12",
volume = "83",
doi = "10.2298/JSC180913084V"
}

Vukicević, N. M., Cvetković, V. S., Nikolic, N. D., Branković, G., Barudzija, T. S.,& Jovicević, J. N.. (2018). Formation of the honeycomb-like MgO/Mg(OH)(2) structures with controlled shape and size of holes by molten salt electrolysis. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 83(12), 1351-1362.
https://doi.org/10.2298/JSC180913084V

Vukicević NM, Cvetković VS, Nikolic ND, Branković G, Barudzija TS, Jovicević JN. Formation of the honeycomb-like MgO/Mg(OH)(2) structures with controlled shape and size of holes by molten salt electrolysis. in Journal of the Serbian Chemical Society. 2018;83(12):1351-1362.
doi:10.2298/JSC180913084V .

Vukicević, Nataša M., Cvetković, Vesna S., Nikolic, Nebojša D., Branković, Goran, Barudzija, Tanja S., Jovicević, Jovan N., "Formation of the honeycomb-like MgO/Mg(OH)(2) structures with controlled shape and size of holes by molten salt electrolysis" in Journal of the Serbian Chemical Society, 83, no. 12 (2018):1351-1362,
https://doi.org/10.2298/JSC180913084V . .