Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 40, Issue 10, Pages 3981-3989Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.01.006
Keywords
CeO2-Fe2O3 solid solution; Nanoceramics; Freeze-drying; Enhanced reducibility; CO2-TPD; Total conductivity
Categories
Funding
- Vicerrectorados de Internacionalizacion y de Investigacion de la Universidad de La Laguna
- FundacionPeruilh, Facultad de Ingenieria, Universidad de Buenos Aires
- MINECO, Spain [MAT2010-16007]
- FEDER
- MINDEF, Argentina [011/11]
- Premio FOCA
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In this work iron doped ceria nanoceramics were successfully synthesized through the freeze-drying method. All the solids were nanocrystalline. The incorporation of iron reduced the crystallite size with the corresponding increment of specific surface area, favoured the sintering of the solids that could be achieved at lower temperatures, increased the reduction percentage achieved in hydrogen flow and increased the amount and strength of basic sites. The lattice parameter showed a continuous decrease with the increment in iron content indicating that iron was incorporated into fluorite ceria structure at concentrations above the solubility limit. Finally, the incorporation of iron improved the conductivity and reduced the activation energy of the process. The higher reducibility, the presence of basic sites and the higher conductivity position iron doped ceria materials as promising anodes for intermediate temperature SOFCs, operated with hydrocarbons. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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