caa a22 4500 475815300 CHVBK 20180406123808.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1023/A:1026539032082 doi (NATIONALLICENCE)springer-10.1023/A:1026539032082 Effect of molten carbonate composition on oxygen reduction under pressurized conditions: cyclic voltammetry and equivalent circuit analysis [Elektronische Daten] [M. Mohamedi, Y. Hisamitsu, Y. Ono, T. Itoh, I. Uchida] The oxygen reduction mechanism was investigated in carbonate melts of variable composition ranging from the eutectics Li-K, Li-Na to ternary Li-Na-K melts. The effect of pressure on electrode kinetics was also examined. Cyclic voltammetry, convolution voltammetry and electrochemical impedance spectroscopy have shown that oxygen reduction is mass-transfer limited in all melt compositions investigated. It was also found that pressurizing increased the concentration of oxygen electroactive species. To gain information about the reaction mechanism, the impedance spectra have been fitted to four possible equivalents circuits: (i) Randles circuit, (ii) Randles circuit extended by a parallel RC circuit due to film formation, (iii) Gerisher (homogeneous reaction) impedance, and (iv) Modified Randles circuit. The discussion of the results is based on careful analysis of fit quality and meaningfulness of fit parameters. Kluwer Academic Publishers, 2000 molten carbonate nationallicence oxygen reduction nationallicence pressurization nationallicence solubility nationallicence Mohamedi M. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut Hisamitsu Y. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut Ono Y. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut Itoh T. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut Uchida I. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/12(2000-12-01), 1397-1404 0021-891X 30:12<1397 2000 30 10800 https://doi.org/10.1023/A:1026539032082 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1026539032082 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohamedi M. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut NATIONALLICENCE 700 1- Hisamitsu Y. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut NATIONALLICENCE 700 1- Ono Y. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut NATIONALLICENCE 700 1- Itoh T. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut NATIONALLICENCE 700 1- Uchida I. Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, 07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/12(2000-12-01), 1397-1404 0021-891X 30:12<1397 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer