caa a22 4500 475815262 CHVBK 20180406123808.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1026578713427 doi (NATIONALLICENCE)springer-10.1023/A:1026578713427 Determination of diffusion coefficients of depositing ions in molten chlorides by transient electrochemical techniques [Elektronische Daten] [T. Støre, G.M. Haarberg, R. Tunold] The electrochemical reduction of Pb(II), Zn(II) and Mg(II) ions at glassy carbon and tungsten electrodes in molten KCl-LiCl eutectic was studied by linear sweep voltammetry (LSV), convolutive potential sweep voltammetry (CPSV), chronopotentiometry and chronoamperometry. In the case of lead deposition, the initial nucleation stage was found to influence the shape of the voltammetric current peak. CPSV was consequently believed to be a more reliable method than LSV for the calculation of the diffusion coefficient of the Pb(II) ion. Similar complications were not observed for zinc and magnesium since the nucleation overpotentials for these metals were significantly lower than for lead. On the other hand, lithium codeposition made it difficult to interpret the zinc and especially the magnesium convolution voltammograms. Chronopotentiometry yielded practically identical results for D Pb(II) as the voltammetric techniques. However, due to a substantial residual current, the Sand equation was not obeyed for the Zn(II) and Mg(II) ions. Determination of diffusion coefficients from single potentiostatic current transients and the Cottrell equation was not found to be a very reliable method. Empirical expressions for the temperature dependence of D in the range 400-500 °C were calculated for all three ions. Kluwer Academic Publishers, 2000 diffusion coefficient nationallicence electrodeposition nationallicence molten chlorides nationallicence transient techniques nationallicence Støre T. Department of Materials Technology and Electrochemistry, Norwegian University of Science and Technology, N-7491, Trondheim, Norway aut Haarberg G.M. SINTEF Materials Technology, N-7465 Trondheim, Norway aut Tunold R. Department of Materials Technology and Electrochemistry, Norwegian University of Science and Technology, N-7491, Trondheim, Norway aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/12(2000-12-01), 1351-1360 0021-891X 30:12<1351 2000 30 10800 https://doi.org/10.1023/A:1026578713427 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1026578713427 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Støre T. Department of Materials Technology and Electrochemistry, Norwegian University of Science and Technology, N-7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Haarberg G.M. SINTEF Materials Technology, N-7465 Trondheim, Norway aut NATIONALLICENCE 700 1- Tunold R. Department of Materials Technology and Electrochemistry, Norwegian University of Science and Technology, N-7491, Trondheim, Norway aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/12(2000-12-01), 1351-1360 0021-891X 30:12<1351 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer