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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Synthesis of $La_{x}Sr_{1-x}GaO_{3}$ Electrode Material for High Temperature Steam Electrolysis

고온 수증기 전해용 $La_{x}Sr_{1-x}GaO_{3}$ 전극 재료의 합성 연구

  • Park, Mi-Sun (Dept. of Chem. Eng. & Tech. Yeungnam Univ.) ;
  • Ryu, Si-Ok (Dept. of Chem. Eng. & Tech. Yeungnam Univ.) ;
  • Woo, Sang-Kook (Reaction & Separation Materials Research Center, Korea Institute of Energy Research) ;
  • Park, Young-Tae (Dept. of Display & Chem. Eng., Kyungil Univ.) ;
  • Choi, Ho-Sang (Dept. of Display & Chem. Eng., Kyungil Univ.)
  • 박미선 (영남대학교 응용화학과) ;
  • 류시옥 (영남대학교 응용화학과) ;
  • 우상국 (한국에너지기술연구원 반응분리소재센터) ;
  • 박영태 (경일대학교 디스플레이화학공학과) ;
  • 최호상 (경일대학교 디스플레이화학공학과)
  • Published : 2009.10.31
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Abstract

In this paper, we synthesized LSG powder by Modified-GNP method. Lanthanum, strontium and gallium (LSG) were selected in the preparation of an oxygen-electrode (anode) for High Temperature Steam Electrolysis system (HTSE). The used amount and concentration of nitric acid were varied to find out an appropriate composition for oxygen-electrode (anode). In order to optimize the molar ratio of La and Sr, ratio of La to Sr was varied that 2:8, 5:5 and 8:2. The combined LSGs were calcined for 2 hours at $700^{\circ}C$ and were sintered in a furnace for 4 hours at $1200^{\circ}C$. The phase and crystallinity of LSG powder were determined by XRD. The surface morphology was observed through SEM photograph, and the specific surface area was investigated with BET. The thermochemical property was determined by TG/DTA. The synthesized preparation was obtained of $La_{0.8}Sr_{0.2}GaO_{3}$ formula for 3M nitric acid, which was the best perovskite phase.

Keywords

References

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