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Citation: LI Mei SUN, HAN Wei, WANG Shan-Shan, ZHANG Mi-Lin, YAN Yong-De, ZHANG Meng. Electrochemical Preparation of Ho-Ni Intermetallic Compounds in LiCl-KCl Eutectic Melts[J]. Chinese Journal of Inorganic Chemistry, ;2015, (1): 177-182. doi: 10.11862/CJIC.2015.006 shu

Electrochemical Preparation of Ho-Ni Intermetallic Compounds in LiCl-KCl Eutectic Melts

  • 1.

    Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

  • Corresponding author: HAN Wei, 
  • Received Date: 30 June 2014
    Available Online: 8 October 2014

    Fund Project: 国家自然科学基金(No.21271054,21173060,51104050) (No.21271054,21173060,51104050)国家自然基金重大研究计划(No.91326113,91226201)以及中央高校研究基金(HEUCF201403001)资助项目. (No.91326113,91226201)以及中央高校研究基金(HEUCF201403001)

  • The electrochemical behavior of Ho(Ⅲ) in LiCl-KCl eutectic melts and the alloying mechanism of Ho-Ni alloys were investigated by cyclic voltammetry, square wave voltammetry and open circuit chronopotentiometry. On an inert Welectrode, the electroreduction of Ho(Ⅲ) proceeds in a one-step process involving three electrons at -2.06 V (vs Ag/AgCl). Compared with the cyclic voltammograms on an inert Welectrode, three reduction peaks are observed which indicates the under-potential deposition of Ho(Ⅲ) on the reactive Ni electrode due to the formation of Ho-Ni intermetallic compounds. Three alloy samples were produced by potentiostatic electrolysis at various potentials and characterized by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive spectrometer (SEM-EDS), respectively. The results confirm the three alloy samples of Ho2Ni17, HoNi5 and HoNi2 intermetallic compounds, respectively.
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