화학공학소재연구정보센터
Korean Chemical Engineering Research, Vol.50, No.6, 939-944, December, 2012
MgCl2-CaCl2-NaCl 혼합용융염에서 Mg2+ 이온의 전기화학적 거동
Electrochemical Behavior of Mg2+ Ions in MgCl2-CaCl2-NaCl Molten Salt
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초록
본 연구에서는 MgCl2-CaCl2-NaCl 혼합용융염에서 Mg2+ 이온의 전기화학적 거동을 평가하였다. MgCl2-CaCl2-NaCl 용융염에서 순환전압전류법 측정을 통해 Mg2+ 이온의 환원전위를 측정하였고, MgCl2의 농도 변화 및 용융염의 온도 변화에 따른 환원전위의 영향에 대해 살펴보았다. 그리고 각각 660, 680, 700, 720 및 740 ℃의 온도에서 Mg2+ 이온의 확산계수를 계산한 결과 8.79×10^(-6), 9.56×10^(-6), 1.17×10^(-5), 1.4×10^(-5) 및 1.77×10^(-5) cm2 s^(-1)로 측정되었다. 또한 Arrhenius 식을 통해 Mg2+ 이온의 확산에 대한 활성화 에너지는 70.28 kJ mol^(-1)로 계산되었다.
The electrochemical behavior of magnesium ions was examined by cyclic voltammetry in a molten MgCl2-CaCl2-NaCl salt. The reduction potential of magnesium ions was measured and those values were estimated with the variation of the concentration of MgCl2 and the temperature of molten salts. The diffusion coefficient of the Mg2+ ions has been determined at 660, 680, 700, 720 and 740 ℃. The values were 8.79×10^(-6), 9.56×10^(-6), 1.17×10^(-5), 1.4×10^(-5) and 1.77×10^(-5) cm2 s^(-1). The activation energy for the diffusion processes of Mg2+ ions was found to be 70.28 kJ mol^(-1) by using the Arrhenius equation.
  1. Park HK, J. KSGE., 11(1), 13 (2008)
  2. Gao F, Nie ZR, Wang ZH, Gong XZ, Zuo TY, J. Trans. Nonferrous Met. Soc.China., 18(3), 749 (2008)
  3. Thayer RL, Neelameggham RN, JOM., 53(8), 15 (2001)
  4. Rajagopalan N, Srikantan S, Srinivasan LK, Kannan GN, Selvakesavan A, JOM., 52(3), 18 (2000)
  5. Jeong SM, Jung JY, Seo CS, Park SW, J.Alloys Compd., 440(1-2), 210 (2007)
  6. Jeong SM, Yoo HY, Hur JM, Seo CS, J. Alloys Compd., 452(1), 27 (2008)
  7. Jeong SM, Shin HS, Hong SS, Hur JM, Do JB, Lee HS, Electrochim. Acta, 55(5), 1749 (2010)
  8. Martinez AM, Borresen B, Haarberg GM, Castrillejo Y, Tunold R, J. Electrochem. Soc., 151(7), C508 (2004)
  9. Martinez AM, Borresen B, Haarberg GM, Castrillejo Y, Tunold R, J. Appl. Electrochem., 34(12), 1271 (2004)
  10. Castrillejo Y, Martinez AM, Pardo R, Haarberg GM, Electrochim. Acta, 42(12), 1869 (1997)
  11. Store T, Haarberg GM, Tunold R, J. Appl. Electrochem., 30(12), 1351 (2000)