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http://dx.doi.org/10.9713/kcer.2015.53.2.145

Preparation of La0.5Nd0.5Ni5 Alloy by an Electrochemical Reduction in Molten LiCl  

Lim, Jong Gil (Department of Chemical Engineering, Chungbuk National University)
Jeong, Sang Mun (Department of Chemical Engineering, Chungbuk National University)
Publication Information
Korean Chemical Engineering Research / v.53, no.2, 2015 , pp. 145-149 More about this Journal
Abstract
The electrochemical behavior of $Nd_2O_3-La_2O_3-NiO$ mixed oxide including rare earth resources has been studied to synthesize $La_{0.5}Nd_{0.5}Ni_5$ alloy in a LiCl molten salt. The $Nd_2O_3-La_2O_3-NiO$ mixed oxide was converted to $NiNd_2O_4$ (spinel) and $LaNiO_3$ (perovskite) structures at a sintering temperature of $1100^{\circ}C$. The spinel and perovskite structures led a speed-up in the electrolytic reduction of the mixed oxide. Various reaction intermediates such as Ni, $NiLa_2O_4$ were observed during the electrochemical reduction by XRD analysis. A possible reaction route to $La_{0.5}Nd_{0.5}Ni_5$ in the LiCl molten salt was proposed based on the analysis result.
Keywords
Electrochemical Reduction; LiCl; Molten Salt; $La_{0.5}Nd_{0.5}Ni_5$; Rare Earth Resources Metal;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Schlapbach, L. and Zuttel, A., "Hydrogen-storage Materials for Mobile Applications," Nature., 414(6861), 353-358(2001).   DOI
2 Tliha, M., Mathlouthi, H., Lamloumi, J. and Percheron-Guegan, A., "Electrochemical Kinetic Parameters of a Metal Hydride Battery Electrode," Int. J. Hydrog. Energy, 32(5), 611-614(2007).   DOI
3 Zhao, B., Wang, L., Dai, L., Cui, G., Zhou, H. and Kumar R., "Direct Electrolytic Preparation of Cerium/nickel Hydrogen Storage Alloy Powder in Molten Salt," J. Alloys Compd., 468(1), 379-385(2009).   DOI
4 Drasner, A. and Blazina, Z., "The Effect of Substitution of ga for ni on the Hydrogen Sorption Properties of $NdNi_5$," J. Alloys Compd., 381(1), 188-191(2004).   DOI
5 Zhu, Y., Wang, D., Ma, M., Hu, X., Jin, X. and Chen, G. Z., "More Affordable Electrolytic $LaNi_5$-type Hydrogen Storage Powders," Chem. Commun., 2515-2517(2007).
6 Yoon, H. S., Kim, C. J., Chung, K. W., Lee, S. J., Joe, A. R., Shin, Y. H., Lee, S. I., Yoo, S. J. and Kim, J. G., "Leaching Kinetics of Neodymium in Sulfuric Acid from E-scrap of NdFeB Permanent Magnet," Korean J. Chem. Eng., 31(4), 706-711(2014).   DOI
7 Nam, S. U. and Paik, Y. H., "A Study on the Production of Nd- Fe Mother Alloy from $Nd_2O_3$ by the Molten Salt Electrolysis," J. Korean Inst. Met. Mater., 31(9), 1156-1161(1993).
8 Choi, E. Y., Hur, J. M., Choi, I. S., Kwon, S. G., Kang, D. S., Hong, S. S., Shin, H. S., Yoo, M. A. and Jeong, S. M., "Electrochemical Reduction of Porous 17 kg Uranium Oxide Pellets by Selection of an Optimal Cathode/anode Surface Area Ratio," J. Nucl. Mater., 418(1), 87-92(2011).   DOI   ScienceOn
9 Choi, E. Y., Hong, S. S. Park, . Im, H. S., Oh, S. C., Won, C. Y., Cha, J. S. and Hur, J. M., "Electrochemical Reduction Process for Pyroprocessing," Korean Chem. Eng. Res., 52(3), 279-288(2014).   DOI
10 Ryu, H. Y., Jeong, S. M. and J. G. Kim, "Electrochemical Behavior of $Mg^{2+}$ ions in $MgCl_2-CaCl_2-NaCl$ Molten Salt," Korean Chem. Eng. Res., 50(6) 939-944(2012).
11 Chen, G. Z., Fray, D. J. and Farthing, T. W., "Direct Electrochemical Reduction of Titanium Dioxide to Titanium in Molten Calcium Chloride," Nature, 407(6802), 361-364(2000).   DOI
12 Ma, M., Wang, D., Wang, W., Hu, X., Jin, X. and Chen, G. Z., "Extraction of Titanium From Different Titania Precursors by the FFC Cambridge Process," J. Alloys Compd., 420(1), 37-45 (2006).   DOI
13 Chen, G. and Fray, D., "Understanding the Electro-reduction of Metal Oxides in Molten Salts," Light Metals 881-886(2004).
14 Qiu, G., Feng, X., Liu, M., Tan, W. and Liu, F., "Investigation on Electrochemical Reduction Process of $Nb_2O_5$ Powder in Molten $CaCl_2$ with Metallic Cavity Electrode," Electrochim. Acta., 53(12), 4074-4081(2008).   DOI
15 Zhang, Y., Yin, H., Zhang, S., Tang, D., Yuan, Z., Yan, T., Zheng, W. and Wang, D., "Preparation of $CeNi_2$ Intermetallic Compound by Direct Electro Reduction of Solid $CeO_2$-2NiO in Molten LiCl," J. Rare Earths., 30(9), 923-927(2012).   DOI
16 Kim, P., Xie, H., Zhai, Y., Zou, X. and Lang, X., "Direct Electrochemical Reduction of $Dy_2O_3$ in $CaCl_2$ Melt," J. Appl. Electrochem., 42(4), 257-262(2012).   DOI
17 Ji, H. S., Ryu, H. Y., Jeong, S. M. and Cho, S. W, "Fast Electrochemical Synthesis of $NdNi_5$ Hydrogen Storage Alloy in Molten Salt," Chem. Lett., 42(10), 1182-1184(2013).   DOI
18 Abdelkader, A. M., Hyslop, D. J. S., Cox, A. and Fray, D. J., "Electrochemical Synthesis and Characterization of a $NdCo_5$ Permanent Magnet," J. Mater. Chem., 20, 6039-6049(2010).   DOI
19 Kim, D. S., Cho, P. S., Lee, J. H., Kim, D. Y. and Lee, S. B., "Improvement of Grain-boundary Conduction in Gadolinia-doped Ceria Via Post-sintering Heat Treatment," Solid State Ion., 177(19), 2125-2128(2006).   DOI