Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications
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...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03603199_v40_n10_p3981_Mazan |
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todo:paper_03603199_v40_n10_p3981_Mazan2023-10-03T15:26:30Z Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications Mazan, M.O. Marrero-Jerez, J. Soldati, A. Núñez, P. Larrondo, S.A. CeO2-Fe2O3 solid solution CO2-TPD Enhanced reducibility Freeze-drying Nanoceramics Total conductivity Activation energy Carbon dioxide Crystallite size Drying Low temperature drying Nanocrystals Sintering Solid oxide fuel cells (SOFC) Electrocatalytic Enhanced reducibility Freeze drying Freeze drying method Intermediate temperatures Lower temperatures Nano ceramics Solubility limits Iron 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 © 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03603199_v40_n10_p3981_Mazan |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
CeO2-Fe2O3 solid solution CO2-TPD Enhanced reducibility Freeze-drying Nanoceramics Total conductivity Activation energy Carbon dioxide Crystallite size Drying Low temperature drying Nanocrystals Sintering Solid oxide fuel cells (SOFC) Electrocatalytic Enhanced reducibility Freeze drying Freeze drying method Intermediate temperatures Lower temperatures Nano ceramics Solubility limits Iron |
| spellingShingle |
CeO2-Fe2O3 solid solution CO2-TPD Enhanced reducibility Freeze-drying Nanoceramics Total conductivity Activation energy Carbon dioxide Crystallite size Drying Low temperature drying Nanocrystals Sintering Solid oxide fuel cells (SOFC) Electrocatalytic Enhanced reducibility Freeze drying Freeze drying method Intermediate temperatures Lower temperatures Nano ceramics Solubility limits Iron Mazan, M.O. Marrero-Jerez, J. Soldati, A. Núñez, P. Larrondo, S.A. Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| topic_facet |
CeO2-Fe2O3 solid solution CO2-TPD Enhanced reducibility Freeze-drying Nanoceramics Total conductivity Activation energy Carbon dioxide Crystallite size Drying Low temperature drying Nanocrystals Sintering Solid oxide fuel cells (SOFC) Electrocatalytic Enhanced reducibility Freeze drying Freeze drying method Intermediate temperatures Lower temperatures Nano ceramics Solubility limits Iron |
| description |
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 © 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. |
| format |
JOUR |
| author |
Mazan, M.O. Marrero-Jerez, J. Soldati, A. Núñez, P. Larrondo, S.A. |
| author_facet |
Mazan, M.O. Marrero-Jerez, J. Soldati, A. Núñez, P. Larrondo, S.A. |
| author_sort |
Mazan, M.O. |
| title |
Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| title_short |
Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| title_full |
Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| title_fullStr |
Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| title_full_unstemmed |
Fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| title_sort |
fe-doped ceria nanopowders synthesized by freeze-drying precursor method for electrocatalytic applications |
| url |
http://hdl.handle.net/20.500.12110/paper_03603199_v40_n10_p3981_Mazan |
| work_keys_str_mv |
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| _version_ |
1807315138796060672 |