XRD and raman spectroscopy study of Mn solubility in cerium oxide

L. Zhao; J. Hyodo; T. Ishihara; K. Sasaki; S. R. Bishop

doi:10.1149/05701.1607ecst

XRD and raman spectroscopy study of Mn solubility in cerium oxide

L. Zhao, J. Hyodo, T. Ishihara, K. Sasaki, S. R. Bishop

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Abstract

The solubility of Mn in CeO2 was investigated for 3-50 mol% Mn. Powders were synthesized by the Pechini method in air. Raman spectroscopy and lattice parameter analysis revealed that the solubility limit of Mn in CeO2 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 Mn versus Ce. As a consequence, an approach to increase the Mn radii size through annealing in reducing conditions (humidified H2 at 1100 °C) was attempted. In this case, the MnO phase was observed by XRD, thereby indicating difficulty in obtaining Mn doped CeO2 under reducing conditions, as well.

Original language	English
Pages (from-to)	1607-1612
Number of pages	6
Journal	ECS Transactions
Volume	57
Issue number	1
DOIs	https://doi.org/10.1149/05701.1607ecst
Publication status	Published - 2013

All Science Journal Classification (ASJC) codes

Engineering(all)

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10.1149/05701.1607ecst

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abstract = "The solubility of Mn in CeO2 was investigated for 3-50 mol% Mn. Powders were synthesized by the Pechini method in air. Raman spectroscopy and lattice parameter analysis revealed that the solubility limit of Mn in CeO2 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 Mn versus Ce. As a consequence, an approach to increase the Mn radii size through annealing in reducing conditions (humidified H2 at 1100 °C) was attempted. In this case, the MnO phase was observed by XRD, thereby indicating difficulty in obtaining Mn doped CeO2 under reducing conditions, as well.",

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AU - Zhao, L.

AU - Hyodo, J.

AU - Ishihara, T.

AU - Sasaki, K.

AU - Bishop, S. R.

PY - 2013

Y1 - 2013

N2 - The solubility of Mn in CeO2 was investigated for 3-50 mol% Mn. Powders were synthesized by the Pechini method in air. Raman spectroscopy and lattice parameter analysis revealed that the solubility limit of Mn in CeO2 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 Mn versus Ce. As a consequence, an approach to increase the Mn radii size through annealing in reducing conditions (humidified H2 at 1100 °C) was attempted. In this case, the MnO phase was observed by XRD, thereby indicating difficulty in obtaining Mn doped CeO2 under reducing conditions, as well.

AB - The solubility of Mn in CeO2 was investigated for 3-50 mol% Mn. Powders were synthesized by the Pechini method in air. Raman spectroscopy and lattice parameter analysis revealed that the solubility limit of Mn in CeO2 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 Mn versus Ce. As a consequence, an approach to increase the Mn radii size through annealing in reducing conditions (humidified H2 at 1100 °C) was attempted. In this case, the MnO phase was observed by XRD, thereby indicating difficulty in obtaining Mn doped CeO2 under reducing conditions, as well.

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XRD and raman spectroscopy study of Mn solubility in cerium oxide

Abstract

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