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Preparation and Characterization of (La, Sr)$MnO_3$ Electrode for High Temperature Steam Electrolysis by Glycine-Nitrate Process  

Choi, Ho-Sang (Laboratory of Membrane Separation Process, Dept. of Chem. Eng., Kyungil University)
Kim, Hyun-Jin (Energy & Advanced Material Engineering Lab. of Chem. Eng. & Tech., Yeungnam University)
Ryu, Si-Ok (Energy & Advanced Material Engineering Lab. of Chem. Eng. & Tech., Yeungnam University)
Hwang, Gab-Jin (Thermochemical Hydrogen Research Group, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.18, no.1, 2007 , pp. 46-51 More about this Journal
Abstract
LSM powder material for an oxygen-electrode(anode) of High Temperature Steam Electrolysis (RISE) was synthesized by a Modified-Glycine nitrate process(GNP). Amount of nitric acid and its concentration was varied to find out an appropriate composition for the oxygen-electrode(anode). In order to optimize the amount of Glycine used as an oxidant of self-combustion process, the ratio of Glycine to Anion was varied. $La_{0.8}Sr_{0.2}MnO_3$, $La_{0.5}Sr_{0.5}MnO_3$, and $La_{0.2}Sr_{0.8}MnO_3$ were synthesized in this study. Those LSM were dried for overnight to remove moisture from the material at $110^{\circ}C$ and were calcined 2 hours at $650^{\circ}C$ and were sintered in a furnace for 5 hours at $1400^{\circ}C$. Their structures, surface morphologies, surface areas, and weight changes were investigated with XRD, SEM, BET, and TG/DTA. The best perovskite phase for the oxygen-electrode of HTSE was obtained with $La_{0.8}Sr_{0.2}MnO_3$ formula in which 100 ml of 3M nitric acid was used in the preparation of its formula. The optimized ratio of Glycine to Anion was 2.
Keywords
high temperature steam electrolysis; GNP(Glycine-Nitrate Process); perovskite($ABO_3$; ); oxygen-electrode; anion;
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Times Cited By KSCI : 4  (Citation Analysis)
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