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DC Field | Value | Language |
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dc.citation.endPage | 24359 | - |
dc.citation.number | 43 | - |
dc.citation.startPage | 24353 | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 7 | - |
dc.contributor.author | Enriquez, Erik | - |
dc.contributor.author | Xu, Xing | - |
dc.contributor.author | Bao, Shanyong | - |
dc.contributor.author | Harrell, Zach | - |
dc.contributor.author | Chen, Chonglin | - |
dc.contributor.author | Choi, Sihyuk | - |
dc.contributor.author | Jun, Areum | - |
dc.contributor.author | Kim, Guntae | - |
dc.contributor.author | Whangbo, Myung-Hwan | - |
dc.date.accessioned | 2023-12-22T00:37:38Z | - |
dc.date.available | 2023-12-22T00:37:38Z | - |
dc.date.created | 2015-11-26 | - |
dc.date.issued | 2015-11 | - |
dc.description.abstract | The Sr and Fe codoped double perovskites PrBaCo2O5.5+delta (PrBCO) thin films of Pr(Ba0.5Sr0.5)(Co1.5Fe0.5)O5.5+delta (PBSCFO) were epitaxially grown for chemical catalytic studies. The resistance behavior of PBSCFO epitaxial films was monitored under the switching flow of reducing and oxidizing gases as a function of the gas flow time, t, using an electrical conductivity relaxation (ECR) experimental setup. The R(t) vs t relationships determined at various temperatures show the occurrence of two oxidation processes, Co2+/Co3+ <-> Co3+ and Co3+ <-> Co3+/Co4+. Mathematical fitting of the observed R(t) vs t relationships was carried out using Fick's second law for one-dimensional diffusion of charge carriers to derive the diffusivity D(T) and tau(T) for the two processes at various temperatures, T. The D(T) vs T relationships were analyzed in terms of the Arrhenius relationship to find the activation energies E-a for each process. Oscillations in the dR(t)/dt plots, observed under oxidation reactions, were discussed in terms of a layer-by-layer oxygen vacancy exchange diffusion mechanism. Our work suggests that thin films of LnBCO (Ln = lanthanide) with their A and B sites doped as in PBSCFO are excellent candidates for the development of low or intermediate temperature energy conversion devices and gas sensor applications. | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.7, no.43, pp.24353 - 24359 | - |
dc.identifier.doi | 10.1021/acsami.5b07688 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.scopusid | 2-s2.0-84946732281 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/17896 | - |
dc.identifier.url | http://pubs.acs.org/doi/10.1021/acsami.5b07688 | - |
dc.identifier.wosid | 000364355500062 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Catalytic Dynamics and Oxygen Diffusion in Doped PrBaCo2O5.5+δ Thin Films | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | ion diffusion | - |
dc.subject.keywordAuthor | MIEC | - |
dc.subject.keywordAuthor | PrBaCo2O5+δ | - |
dc.subject.keywordAuthor | surface catalysis | - |
dc.subject.keywordAuthor | transport properties | - |
dc.subject.keywordPlus | TRANSPORT MEMBRANE TECHNOLOGY | - |
dc.subject.keywordPlus | OXIDE FUEL-CELLS | - |
dc.subject.keywordPlus | SYNGAS PRODUCTION | - |
dc.subject.keywordPlus | CATHODE MATERIALS | - |
dc.subject.keywordPlus | HIGHLY EFFICIENT | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | SEPARATION | - |
dc.subject.keywordPlus | EXCHANGE | - |
dc.subject.keywordPlus | SURFACES | - |
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