Y. Castrillejo et al., ELECTROCHEMICAL-BEHAVIOR OF MAGNESIUM-IONS IN THE EQUIMOLAR CACL2-NACL MIXTURE AT 550-DEGREES-C, Electrochimica acta, 42(12), 1997, pp. 1869-1876
The electrochemical behaviour of magnesium ions was studied in molten
CaCl2-NaCl at 550 degrees C by cyclic voltammetry, chronoamperometry a
nd chronopotentiometry. We observed that the electrode process of the
reduction of Mg(II) on a tungsten electrode is quasireversible. The va
lues of the transfer coefficient, alpha, and the charge-transfer rate
constant, k(0), were calculated by means of the logarithmic analysis o
f the convoluted curves. Those values were compared with the ones obta
ined from the steady-state current-potential curves. On the other hand
, the diffusion coefficient of the Mg(II) ions, has also been determin
ed by different electrochemical techniques, giving values ranging from
7.2 to 9.9 x 10(-6) cm(2) s(-1) (C) 1997 Elsevier Science Ltd.