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Enhancing oxygen exchange kinetics of solid oxide fuel cell cathode: Unleashing the potential of higher order Ruddlesden-Popper phase surface modification

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dc.citedby2
dc.contributor.authorSaher S.en_US
dc.contributor.authorTan C.Y.en_US
dc.contributor.authorRamesh S.en_US
dc.contributor.authorYap B.K.en_US
dc.contributor.authorOng B.H.en_US
dc.contributor.authorAl-Furjan M.S.H.en_US
dc.contributor.authorid36134688200en_US
dc.contributor.authorid16029485400en_US
dc.contributor.authorid7103211834en_US
dc.contributor.authorid26649255900en_US
dc.contributor.authorid7102342460en_US
dc.contributor.authorid57888381600en_US
dc.date.accessioned2024-10-14T03:17:21Z
dc.date.available2024-10-14T03:17:21Z
dc.date.issued2023
dc.description.abstractTailoring the electrode surface represents a promising strategy to enhance electrochemical performance while preserving base material integrity. Achieving appropriate surface coverage with catalytic active oxide material is critical for efficient oxygen transport at the triple phase boundary (TPB). To further explore this approach, the perovskite structure La0.6Sr0.4Co0.2Fe0.8O3-? (LSCF) is decorated with a higher order Ruddlesden-Popper phase Pr4Ni3O10+? (PNO). This combination is being investigated using electrical conductivity relaxation (ECR) technique to study the oxygen exchange kinetics. Samples with varying surface coverage of PNO are examined in a temperature range of 650 �C�850 �C, with a step change in pO2 between 0.1 atm and 0.21 atm. The chemical diffusion coefficient, Dchem, remains invariant across all the samples, however, the surface exchange coefficient, kchem, varies with the surface coverage of PNO. Notably, the coated sample with a PNO loading content of 0.28 mg cm?2, referred to as PNO5, demonstrates a significant enhancement of nearly two orders of magnitude in kchem compared to bare LSCF at 650 �C. This substantial improvement is ascribed to the increased active sites of ORR within the TPB region and the facilitated electron access through tunneling from LSCF to the coated phase. Pulse isotopic exchange (PIE) measurements on the fractionated powders confirm the fast surface exchange kinetics of PNO. Such remarkable oxygen exchange characteristics encourage the use of PNO, along with LSCF, as potential candidates for SOFC cathodes. � 2023 Elsevier B.V.en_US
dc.description.natureFinalen_US
dc.identifier.ArtNo233607
dc.identifier.doi10.1016/j.jpowsour.2023.233607
dc.identifier.scopus2-s2.0-85170709225
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85170709225&doi=10.1016%2fj.jpowsour.2023.233607&partnerID=40&md5=ec776f0a39baf2d0c41e2da1f4a42264
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/33862
dc.identifier.volume584
dc.publisherElsevier B.V.en_US
dc.sourceScopus
dc.sourcetitleJournal of Power Sources
dc.subjectMixed conducting oxides
dc.subjectOxygen surface kinetics
dc.subjectPerovskite structure
dc.subjectRuddlesden-popper phase
dc.subjectSOFC cathode
dc.subjectElectrochemical electrodes
dc.subjectIron compounds
dc.subjectKinetics
dc.subjectLanthanum compounds
dc.subjectNickel compounds
dc.subjectOxygen
dc.subjectPerovskite
dc.subjectPraseodymium compounds
dc.subjectSolid oxide fuel cells (SOFC)
dc.subjectStrontium compounds
dc.subjectHigh-order
dc.subjectMixed conducting oxides
dc.subjectOxygen exchange kinetics
dc.subjectOxygen surface
dc.subjectOxygen surface kinetic
dc.subjectPerovskite structures
dc.subjectRuddlesden-Popper phase
dc.subjectSOFC cathode
dc.subjectSurface coverages
dc.subjectSurface kinetics
dc.subjectCathodes
dc.titleEnhancing oxygen exchange kinetics of solid oxide fuel cell cathode: Unleashing the potential of higher order Ruddlesden-Popper phase surface modificationen_US
dc.typeArticleen_US
dspace.entity.typePublication
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