Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/36061
DC Field | Value | Language |
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dc.contributor | Department of Building and Real Estate | - |
dc.creator | Dong, FF | - |
dc.creator | Ni, M | - |
dc.creator | Chen, YB | - |
dc.creator | Chen, DJ | - |
dc.creator | Tade, MO | - |
dc.creator | Shao, ZP | - |
dc.date.accessioned | 2016-04-15T08:36:20Z | - |
dc.date.available | 2016-04-15T08:36:20Z | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | http://hdl.handle.net/10397/36061 | - |
dc.language.iso | en | en_US |
dc.publisher | Royal Society of Chemistry | en_US |
dc.rights | © The Royal Society of Chemistry 2014 | en_US |
dc.rights | This is an Author's Accepted Manuscript of the following article: Dong, F., Ni, M., Chen, Y., Chen, D., Tadé, M. O., & Shao, Z. (2014). Structural and oxygen-transport studies of double perovskites PrBa 1− x Co 2 O 5+ δ (x= 0.00, 0.05, and 0.10) toward their application as superior oxygen reduction electrodes. Journal of Materials Chemistry A, 2(48), 20520-20529, which has been published in final form at: http://dx.doi.org/10.1039/c4ta04372c | en_US |
dc.title | Structural and oxygen-transport studies of double perovskites PrBa1-xCo2O5+delta (x=0.00, 0.05, and 0.10) toward their application as superior oxygen reduction electrodes | en_US |
dc.type | Journal/Magazine Article | en_US |
dc.identifier.spage | 20520 | - |
dc.identifier.epage | 20529 | - |
dc.identifier.volume | 2 | - |
dc.identifier.issue | 48 | - |
dc.identifier.doi | 10.1039/c4ta04372c | - |
dcterms.abstract | Here we present a comprehensive study of oxygen-deficient double perovskites PrBa1-xCo2O5+delta (x = 0.00, 0.05, and 0.10) to exploit their potential use as cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Special attention is paid to the structure, oxygen concentration, and oxygen-ion transport properties, which are key factors related to the electrochemical performance. Based on the results obtained from a series of high-resolution structural analysis techniques, such as XRD, SAED, and HR-TEM, these double perovskite oxides possess tetragonal lattice symmetry and a stable crystal structure. According to the information obtained from iodometric titration, TGA, and O-2-TPD measurements, an increase in oxygen vacancy concentration in the lattice with an increasing Ba cation deficiency (x value) is demonstrated. Additionally, oxygen permeation flux and electrical conductivity relaxation (ECR) measurements illustrate an improved oxygen ionic conductivity, chemical bulk diffusion coefficient (D-chem) and chemical surface exchange coefficient (K-chem) with the introduction of Ba deficiency, likely due to the increase in the concentration of oxygen vacancies. Tests at 700 degrees C of the electrochemical performance based on symmetrical cells show area specific resistances (ASRs) of 0.045, 0.041, and 0.036 Omega cm(2) for PrBa1-xCo2O5+delta with x = 0.00, 0.05, and 0.10, respectively. These results are extremely promising; consequently, these oxides are worthy of further study and optimization as cathode materials for IT-SOFCs. | - |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | Journal of materials chemistry A, 2014, v. 2, no. 48, p. 20520-20529 | - |
dcterms.isPartOf | Journal of materials chemistry A | - |
dcterms.issued | 2014 | - |
dc.identifier.isi | WOS:000345531200015 | - |
dc.identifier.scopus | 2-s2.0-84911878134 | - |
dc.identifier.eissn | 2050-7496 | - |
dc.identifier.rosgroupid | 2014000007 | - |
dc.description.ros | 2014-2015 > Academic research: refereed > Publication in refereed journal | - |
dc.description.oa | Accepted Manuscript | en_US |
dc.identifier.FolderNumber | OA_IR/PIRA | en_US |
dc.description.pubStatus | Published | en_US |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
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Structural_and_oxygen_transport_studies_of_double_perovskite.pdf | Pre-published version | 212.6 kB | Adobe PDF | View/Open |
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