Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Preparation and Characterization of (La, Sr)$MnO_3$ Electrode for High Temperature Steam Electrolysis by Glycine-Nitrate Process

Glycine-Nitrate Process를 이용한 고온 수증기 전해용 (La, Sr)$MnO_3$ 전극의 합성 및 특성 연구

  • 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)
  • 최호상 (경일대학교 생명화학공학과) ;
  • 김현진 (영남대학교 응용화학공학과) ;
  • 류시옥 (영남대학교 응용화학공학과) ;
  • 황갑진 (한국에너지기술연구원 열화학수소연구단)
  • Published : 2007.03.15
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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.

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References

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