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dc.contributor.authorCrumlin, Ethan J.
dc.contributor.authorMutoro, Eva
dc.contributor.authorAhn, Sung-Jin
dc.contributor.authorla O’, Gerardo Jose
dc.contributor.authorLeonard, Donovan N.
dc.contributor.authorBorisevich, Albina
dc.contributor.authorBiegalski, Michael D.
dc.contributor.authorChristen, Hans M.
dc.contributor.authorShao-Horn, Yang
dc.date.accessioned2016-02-25T13:53:21Z
dc.date.available2016-02-25T13:53:21Z
dc.date.issued2010-10-15
dc.identifier.citationCrumlin EJ, Mutoro E, Ahn S-J, la O’ GJ, Leonard DN, et al. (2010) Oxygen Reduction Kinetics Enhancement on a Heterostructured Oxide Surface for Solid Oxide Fuel Cells. The Journal of Physical Chemistry Letters 1: 3149–3155. Available: http://dx.doi.org/10.1021/jz101217d.
dc.identifier.issn1948-7185
dc.identifier.issn1948-7185
dc.identifier.doi10.1021/jz101217d
dc.identifier.urihttp://hdl.handle.net/10754/599126
dc.description.abstractHeterostructured interfaces of oxides, which can exhibit transport and reactivity characteristics remarkably different from those of bulk oxides, are interesting systems to explore in search of highly active cathodes for the oxygen reduction reaction (ORR). Here, we show that the ORR of ∼85 nm thick La0.8Sr0.2CoO3-δ (LSC113) films prepared by pulsed laser deposition on (001)-oriented yttria-stabilized zirconia (YSZ) substrates is dramatically enhanced (∼3-4 orders of magnitude above bulk LSC113) by surface decorations of (La 0.5Sr0.5)2CoO4±δ (LSC214) with coverage in the range from ∼0.1 to ∼15 nm. Their surface and atomic structures were characterized by atomic force, scanning electron, and scanning transmission electron microscopy, and the ORR kinetics were determined by electrochemical impedance spectroscopy. Although the mechanism for ORR enhancement is not yet fully understood, our results to date show that the observed ORR enhancement can be attributed to highly active interfacial LSC113/LSC214 regions, which were shown to be atomically sharp. © 2010 American Chemical Society.
dc.description.sponsorshipThis work was supported in part by the NSF (CBET 08-44526), DOE (SISGR DE-SC0002633), and King Abdullah University of Science and Technology. E.M. is grateful for financial support from the German Research Foundation (research scholarship). The portion of research performed at the Center for Nanophase Materials Sciences as well as FIB instrument access via ORNL’s ShaRE user facility was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. DOE. The STEM work was sponsored by the Materials Sciences and Engineering Division, Office of Basic Energy Sciences of the U.S. DOE.
dc.publisherAmerican Chemical Society (ACS)
dc.titleOxygen Reduction Kinetics Enhancement on a Heterostructured Oxide Surface for Solid Oxide Fuel Cells
dc.typeArticle
dc.identifier.journalThe Journal of Physical Chemistry Letters
dc.contributor.institutionMassachusetts Institute of Technology, Cambridge, United States
dc.contributor.institutionMaterials Science and Technology Division, Oak Ridge, United States
dc.contributor.institutionCenter for Nanophase Materials Sciences, Oak Ridge, United States
dc.contributor.institutionOak Ridge National Laboratory, Oak Ridge, United States
dc.date.published-online2010-10-15
dc.date.published-print2010-11-04


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