TY - JOUR
T1 - Mixed electronic-oxide ionic conductivity and oxygen permeating property of Fe-, Co- or Ni-doped LaGaO3 perovskite oxide
AU - Ishihara, Tatsumi
AU - Yamada, Takashi
AU - Arikawa, Hiroshi
AU - Nishiguchi, Hiroyasu
AU - Takita, Yusaku
N1 - Funding Information:
The authors greatly acknowledge the financial support from Nissan Science Foundation. Part of this study was supported by a Grant-in-Aid from the Ministry of Education, Science, Sports and Culture of Japan.
PY - 2000/11/1
Y1 - 2000/11/1
N2 - Mixed electronic-oxide ionic conductivity in LaGaO3-based oxide doped with Fe, Co or Ni was investigated in this study. The electric conductivity was greatly increased by doping Fe, Co, or Ni for the Ga site of La0.8Sr0.2GaO3. Compared to the conventional mixed electronic-ionic conductors such as LaCoO3, these LaGaO3-based oxides exhibited a lower electronic conductivity but a higher oxide ion conductivity. In particular, Fe-doped LaGaO3 exhibited a high oxygen permeation rate and a stability against reduction. Consequently, higher CH4 conversion in the partial oxidation of CH4 was attained by using La0.8Sr0.2Ga0.6Fe0.4O3 in the place of the conventional candidate material of La0.6Sr0.4Fe0.8Co0.2O3 for the oxygen permeation membrane. As a result, this study revealed that LaGaO3-based oxide doped with Fe, Co or Ni for Ga site is a new family of mixed electronic-oxide ionic conductors.
AB - Mixed electronic-oxide ionic conductivity in LaGaO3-based oxide doped with Fe, Co or Ni was investigated in this study. The electric conductivity was greatly increased by doping Fe, Co, or Ni for the Ga site of La0.8Sr0.2GaO3. Compared to the conventional mixed electronic-ionic conductors such as LaCoO3, these LaGaO3-based oxides exhibited a lower electronic conductivity but a higher oxide ion conductivity. In particular, Fe-doped LaGaO3 exhibited a high oxygen permeation rate and a stability against reduction. Consequently, higher CH4 conversion in the partial oxidation of CH4 was attained by using La0.8Sr0.2Ga0.6Fe0.4O3 in the place of the conventional candidate material of La0.6Sr0.4Fe0.8Co0.2O3 for the oxygen permeation membrane. As a result, this study revealed that LaGaO3-based oxide doped with Fe, Co or Ni for Ga site is a new family of mixed electronic-oxide ionic conductors.
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U2 - 10.1016/S0167-2738(00)00424-0
DO - 10.1016/S0167-2738(00)00424-0
M3 - Article
AN - SCOPUS:0034323406
SN - 0167-2738
VL - 135
SP - 631
EP - 636
JO - Solid State Ionics
JF - Solid State Ionics
IS - 1-4
ER -