Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts

Cvetković, Vesna S.; Jovićević, Niko; Stevanović, Jasmina S.; Pavlović, Miomir G.; Vukićević, Nataša M.; Stevanović, Zoran; Jovićević, Jovan N.

doi:10.3390/met7030095

Open AccessArticle

Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts

by

Vesna S. Cvetković

^1,*,

Niko Jovićević

²,

Jasmina S. Stevanović

¹,

Miomir G. Pavlović

¹,

Nataša M. Vukićević

¹

,

Zoran Stevanović

³ and

Jovan N. Jovićević

¹

Institute of Chemistry, Technology and Metallurgy, Department of Electrochemistry, University of Belgrade, Njegoševa 12, 110000 Belgrade, Serbia

²

Nissan Technical Center North America, Inc., 39001 Sunrise Drive, Farmington Hills, MI 48331-3487, USA

³

Mining and Metallurgy Institute Bor, Zeleni bulevar 35, 19210 Bor, Serbia

^*

Author to whom correspondence should be addressed.

Metals 2017, 7(3), 95; https://doi.org/10.3390/met7030095

Submission received: 22 November 2016 / Revised: 3 March 2017 / Accepted: 10 March 2017 / Published: 15 March 2017

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Abstract

Magnesium underpotential deposition on gold electrodes from magnesium nitrate –ammonium nitrate melts has been investigated. Linear sweep voltammetry and potential step were used as electrochemical techniques. Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and X-ray diffraction (XRD) were used for characterization of obtained electrode surfaces. It was observed that reduction processes of nitrate, nitrite and traces of water (when present), in the Mg underpotential range studied, proceeded simultaneously with magnesium underpotential deposition. There was no clear evidence of Mg/Au alloy formation induced by Mg UPD from the melt made from eutectic mixture [Mg(NO₃)₂·6H₂O + NH₄NO₃·XH₂O]. However, EDS and XRD analysis showed magnesium present in the gold substrate and four different Mg/Au alloys being formed as a result of magnesium underpotential deposition and interdiffusion between Mg deposit and Au substrate from the melt made of a nonaqueous [Mg(NO₃)₂ + NH₄NO₃] eutectic mixture at 460 K.

Keywords: magnesium/gold alloys; underpotential deposition; magnesium nitrate melts

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MDPI and ACS Style

Cvetković, V.S.; Jovićević, N.; Stevanović, J.S.; Pavlović, M.G.; Vukićević, N.M.; Stevanović, Z.; Jovićević, J.N. Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts. Metals 2017, 7, 95. https://doi.org/10.3390/met7030095

AMA Style

Cvetković VS, Jovićević N, Stevanović JS, Pavlović MG, Vukićević NM, Stevanović Z, Jovićević JN. Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts. Metals. 2017; 7(3):95. https://doi.org/10.3390/met7030095

Chicago/Turabian Style

Cvetković, Vesna S., Niko Jovićević, Jasmina S. Stevanović, Miomir G. Pavlović, Nataša M. Vukićević, Zoran Stevanović, and Jovan N. Jovićević. 2017. "Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts" Metals 7, no. 3: 95. https://doi.org/10.3390/met7030095

APA Style

Cvetković, V. S., Jovićević, N., Stevanović, J. S., Pavlović, M. G., Vukićević, N. M., Stevanović, Z., & Jovićević, J. N. (2017). Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts. Metals, 7(3), 95. https://doi.org/10.3390/met7030095

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Magnesium–Gold Alloy Formation by Underpotential Deposition of Magnesium onto Gold from Nitrate Melts

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