TY - GEN
T1 - XRD and Raman spectroscopy study of Fe solubility in cerium oxide
AU - Zhao, L.
AU - Bishop, S. R.
AU - Hyodo, J.
AU - Ishihara, T.
AU - Sasaki, K.
PY - 2013
Y1 - 2013
N2 - The solubility of Fe in CeO2 was investigated for 3-50 mol% Fe. Powders were synthesized by the Pechini method in air. Raman spectroscopy and lattice parameter analysis revealed that the solubility limit of Fe in CeO 2 is less than 3 mol% for the present preparation conditions. The low solubility limit was rationalized in terms of the much smaller ionic radius of Fe versus Ce. As a consequence, an approach to increase the Fe radii size through annealing in reducing conditions (humidified H2 at 1100 °C) was attempted. In this case, the more stable CeFeO3 phase was observed by XRD, thereby indicating difficulty in obtaining Fe doped CeO 2 under reducing conditions, as well.
AB - The solubility of Fe in CeO2 was investigated for 3-50 mol% Fe. Powders were synthesized by the Pechini method in air. Raman spectroscopy and lattice parameter analysis revealed that the solubility limit of Fe in CeO 2 is less than 3 mol% for the present preparation conditions. The low solubility limit was rationalized in terms of the much smaller ionic radius of Fe versus Ce. As a consequence, an approach to increase the Fe radii size through annealing in reducing conditions (humidified H2 at 1100 °C) was attempted. In this case, the more stable CeFeO3 phase was observed by XRD, thereby indicating difficulty in obtaining Fe doped CeO 2 under reducing conditions, as well.
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U2 - 10.1149/05040.0053ecst
DO - 10.1149/05040.0053ecst
M3 - Conference contribution
AN - SCOPUS:84885775354
T3 - ECS Transactions
SP - 53
EP - 58
BT - ECS Transactions
PB - Electrochemical Society Inc.
ER -