XRD and Raman spectroscopy study of Fe solubility in cerium oxide

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

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)53-58
Number of pages6
JournalECS Transactions
Volume50
Issue number40
DOIs
Publication statusPublished - Dec 1 2012

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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