Surface kinetics and bulk transport in La2Ni0.5Cu0.5O4+δ membranes from conductivity relaxation

dc.date.accessioned	2023-11-09T16:11:55Z
dc.date.available	2023-11-09T16:11:55Z
dc.date.created	2022-10-21T17:34:34Z
dc.date.issued	2023
dc.identifier.citation	Li, Zuoan Haugsrud, Reidar . Surface kinetics and bulk transport in La2Ni0.5Cu0.5O4+δ membranes from conductivity relaxation. Journal of the European Ceramic Society. 2023, 43(2), 462-467
dc.identifier.uri	http://hdl.handle.net/10852/105740
dc.description.abstract	This work reports conductivity relaxation measurements on both uncoated (1.2 mm thick) and coated (2.0 mm thick) La2Ni0.5Cu0.5O4+δ membranes in the temperature range between 550-850 °C and oxygen partial pressures from 0.01 to 1.0 atm. The results show that surface kinetics has a significant effect on the relaxation profiles, especially at low temperatures and should not be neglected when extracting transport parameters. Oxygen chemical diffusion and surface exchange coefficients have been determined by transient conductivity with surface modification. Higher activation energy of surface exchange compared to bulk diffusion is observed in La2Ni0.5Cu0.5O4+δ, similar to that in La2NiO4+δ. Based on the oxygen partial pressure dependence of the surface exchange coefficient, it has been revealed that oxygen dissociative adsorption rate-limits the surface exchange.
dc.language	EN
dc.rights	Attribution 4.0 International
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.title	Surface kinetics and bulk transport in La2Ni0.5Cu0.5O4+δ membranes from conductivity relaxation
dc.title.alternative	ENEngelskEnglishSurface kinetics and bulk transport in La2Ni0.5Cu0.5O4+δ membranes from conductivity relaxation
dc.type	Journal article
dc.creator.author	Li, Zuoan
dc.creator.author	Haugsrud, Reidar
cristin.unitcode	185,15,12,0
cristin.unitname	Kjemisk institutt
cristin.ispublished	true
cristin.fulltext	original
cristin.qualitycode	1
dc.identifier.cristin	2063874
dc.identifier.bibliographiccitation	info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal of the European Ceramic Society&rft.volume=43&rft.spage=462&rft.date=2023
dc.identifier.jtitle	Journal of the European Ceramic Society
dc.identifier.volume	43
dc.identifier.issue	2
dc.identifier.startpage	462
dc.identifier.endpage	467
dc.identifier.doi	https://doi.org/10.1016/j.jeurceramsoc.2022.10.046
dc.type.document	Tidsskriftartikkel
dc.type.peerreviewed	Peer reviewed
dc.source.issn	0955-2219
dc.type.version	PublishedVersion
dc.relation.project	NFR/190901
dc.relation.project	NFR/262393
dc.relation.project	NFR/268450