Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane
[EN] Tb-doped ceria materials have been synthesized by the coprecipitation method. Cobalt oxide (2 mol %) has been added in order to improve the sinterability and conductivity. XRD measurements suggest that a part of the cobalt is incorporated in the ceria lattice. Ce1¿xTbxO2¿¿ materials showed pred...
| Autores: | ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/33848 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/33848 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Mixed ionic electronic conductor Nanocrystalline oxide Fuel cell Oxygen permeation membrane Conductivity relaxation |
| _version_ | 1878738498579595264 |
|---|---|
| author | Balaguer Ramirez, Maria|||0000-0002-7098-9235 |
| author2 | Serra Alfaro, José Manuel|||0000-0002-1515-1106 Solis Díaz, Cecilia |
| author2_role | author author |
| author_browse | Balaguer Ramirez, Maria|||0000-0002-7098-9235 Serra Alfaro, José Manuel|||0000-0002-1515-1106 Solis Díaz, Cecilia |
| author_facet | Balaguer Ramirez, Maria|||0000-0002-7098-9235 Serra Alfaro, José Manuel|||0000-0002-1515-1106 Solis Díaz, Cecilia |
| author_role | author |
| collection | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| description | [EN] Tb-doped ceria materials have been synthesized by the coprecipitation method. Cobalt oxide (2 mol %) has been added in order to improve the sinterability and conductivity. XRD measurements suggest that a part of the cobalt is incorporated in the ceria lattice. Ce1¿xTbxO2¿¿ materials showed predominantly ionic conductivity, but the mixed ionic electronic conductivity can be tuned by modifying Tb and Co doping level and temperature range. The ambipolar conductivity was determined by galvanic method coupled with gas permeation and these results support the applicability of these materials as oxygen transport membranes at high temperature. Ce1¿xTbxO2¿¿ +Co membranes are CO2 stable and yielded oxygen fluxes that can compete with reported perovskite materials. Oxygen diffusion and surface exchange coefficients in the range 1 ¿ 10¿5 to 1 ¿ 10¿4 cm2/s and 1 ¿ 10¿4 to 1 ¿ 10¿3 cm/s from 773 to 1023 K have been obtained by conductivity relaxation. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_affb47c3b42e34be8c362b8b637b0d18 |
| institution | Universitat Politècnica de València (UPV) |
| instname_str | Universitat Politècnica de València (UPV) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:riunet.upv.es:10251/33848 |
| publishDate | 2011 |
| publishDateSort | 2011 |
| publisher | American Chemical Society |
| publisherStr | American Chemical Society |
| reponame_str | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| spelling | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane Balaguer Ramirez, Maria|||0000-0002-7098-9235 Serra Alfaro, José Manuel|||0000-0002-1515-1106 Solis Díaz, Cecilia Mixed ionic electronic conductor Nanocrystalline oxide Fuel cell Oxygen permeation membrane Conductivity relaxation [EN] Tb-doped ceria materials have been synthesized by the coprecipitation method. Cobalt oxide (2 mol %) has been added in order to improve the sinterability and conductivity. XRD measurements suggest that a part of the cobalt is incorporated in the ceria lattice. Ce1¿xTbxO2¿¿ materials showed predominantly ionic conductivity, but the mixed ionic electronic conductivity can be tuned by modifying Tb and Co doping level and temperature range. The ambipolar conductivity was determined by galvanic method coupled with gas permeation and these results support the applicability of these materials as oxygen transport membranes at high temperature. Ce1¿xTbxO2¿¿ +Co membranes are CO2 stable and yielded oxygen fluxes that can compete with reported perovskite materials. Oxygen diffusion and surface exchange coefficients in the range 1 ¿ 10¿5 to 1 ¿ 10¿4 cm2/s and 1 ¿ 10¿4 to 1 ¿ 10¿3 cm/s from 773 to 1023 K have been obtained by conductivity relaxation. Financial support by the Spanish Ministry for Science and Innovation (Project ENE2008-06302, Grant JAE-Pre 08-0058, and Grant BES-2009-015835), Spanish Industry Ministry (Project IAP-560620-2008-17), the EU through FP7 NASA-OTM Project (NMP3-SL-2009-228701) and Instalaciones Inabensa S.A. is kindly acknowledged. The help of Dr. Jorda (HT-XRD) is kindly acknowledged. American Chemical Society https://riunet.upv.es/handle/10251/33848 |
| spellingShingle | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane Balaguer Ramirez, Maria|||0000-0002-7098-9235 Mixed ionic electronic conductor Nanocrystalline oxide Fuel cell Oxygen permeation membrane Conductivity relaxation |
| title | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane |
| title_full | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane |
| title_fullStr | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane |
| title_full_unstemmed | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane |
| title_short | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane |
| title_sort | Study of the transport properties of the mixed ionic electronic conductor Ce 1-x Tb x O 2- + Co (x=0.1, 0.2) and evaluation as oxygen-transport membrane |
| topic | Mixed ionic electronic conductor Nanocrystalline oxide Fuel cell Oxygen permeation membrane Conductivity relaxation |
| topic_facet | Mixed ionic electronic conductor Nanocrystalline oxide Fuel cell Oxygen permeation membrane Conductivity relaxation |
| url | https://riunet.upv.es/handle/10251/33848 |