Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts
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2018
Authors
Cvetković, Vesna S.Vukićević, Nataša M.
Nikolić, Nebojša D.
Branković, Goran O.
Barudžija, Tanja
Jovićević, Jovan N.
Article (Published version)
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© Copyright 2018 Elsevier Ltd.
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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 deposi...t 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. (C) 2018 Elsevier Ltd. All rights reserved.
Keywords:
electrodeposition / magnesium oxide/hydroxide / melt / honeycomb / needlesSource:
Electrochimica Acta, 2018, 268, 494-502Funding / projects:
- New approach in designing materials for energy conversion and energy storage systems (RS-172060)
- Electrochemical synthesis and characterization of nanostructured functional materials for application in new technologies (RS-172046)
Note:
- 20th Topical Meeting of the International-Society-of-Electrochemistry(ISE), Pontifical Catholic Univ, Buenos Aires, ARGENTINA, 2017
DOI: 10.1016/j.electacta.2018.02.121
ISSN: 0272-8842; 1873-3956
WoS: 000428974300014
Scopus: 2-s2.0-85042638607
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VinčaTY - JOUR AU - Cvetković, Vesna S. AU - Vukićević, Nataša M. AU - Nikolić, Nebojša D. AU - Branković, Goran O. AU - Barudžija, Tanja AU - Jovićević, Jovan N. PY - 2018 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7641 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. (C) 2018 Elsevier Ltd. All rights reserved. T2 - Electrochimica Acta T1 - Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts VL - 268 SP - 494 EP - 502 DO - 10.1016/j.electacta.2018.02.121 ER -
@article{ author = "Cvetković, Vesna S. and Vukićević, Nataša M. and Nikolić, Nebojša D. and Branković, Goran O. and Barudžija, Tanja and Jovićević, 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. (C) 2018 Elsevier Ltd. All rights reserved.", journal = "Electrochimica Acta", title = "Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts", volume = "268", pages = "494-502", doi = "10.1016/j.electacta.2018.02.121" }
Cvetković, V. S., Vukićević, N. M., Nikolić, N. D., Branković, G. O., Barudžija, T.,& Jovićević, J. N.. (2018). Formation of needle-like and honeycomb-like magnesium oxide/hydroxide structures by electrodeposition from magnesium nitrate melts. in Electrochimica Acta, 268, 494-502. https://doi.org/10.1016/j.electacta.2018.02.121
Cvetković VS, Vukićević NM, Nikolić ND, Branković GO, Barudžija T, Jovićević 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., Vukićević, Nataša M., Nikolić, Nebojša D., Branković, Goran O., Barudžija, Tanja, Jovićević, 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 . .