A comparative study of SrCo0.8Nb0.2O3−δ and SrCo0.8Ta0.2O3−δ as low-temperature solid oxide fuel cell cathodes: effect of non-geometry factors on the oxygen reduction reaction

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dc.contributor.authorLi, MRen_AU
dc.contributor.authorZhou, Wen_AU
dc.contributor.authorPeterson, VKen_AU
dc.contributor.authorZhao, MWen_AU
dc.contributor.authorZhu, ZHen_AU
dc.date.accessioned2021-08-11T02:24:54Zen_AU
dc.date.available2021-08-11T02:24:54Zen_AU
dc.date.issued2015-11-11en_AU
dc.date.statistics2021-08-03en_AU
dc.description.abstractThe oxygen reduction reaction (ORR) activity of cathodes has to be improved to realize the low-temperature operation of solid-oxide fuel cells (SOFCs). Whilst geometric factors are conventionally accepted to influence the ORR activity of perovskite cathodes, other factors may also contribute and therefore need to be explored. Here, we substituted 20% niobium and tantalum which have similar ionic radii into strontium cobaltites to obtain the two perovskite oxides SrCo0.8Nb0.2O3−δ (SCN20) and SrCo0.8Ta0.2O3−δ (SCT20), respectively. Our study of the isostructural SCN20 and SCT20 allows geometric effects to be separated from other factors, and we observe better cathode performance of SCT20 cathode, which may be related to the lower electronegativity of Ta5+, thus resulting in higher oxygen surface exchange kinetics and diffusivity as compared with Nb5+. © Royal Society of Chemistry 2015en_AU
dc.identifier.citationLi, M., Zhou, W., Peterson, V. K., Zhao, M., & Zhu, Z. (2015). A comparative study of SrCo0.8Nb0.2O3−δ and SrCo0.8Ta0.2O3−δ as low-temperature solid oxide fuel cell cathodes: effect of non-geometry factors on the oxygen reduction reaction. Journal of Materials Chemistry A, 3, (47), 24064-24070. doi:10.1039/C5TA07178Jen_AU
dc.identifier.issn2050-7496en_AU
dc.identifier.issue47en_AU
dc.identifier.journaltitleJournal of Materials Chemistry Aen_AU
dc.identifier.pagination24064-24070en_AU
dc.identifier.urihttps://doi.org/10.1039/C5TA07178Jen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11312en_AU
dc.identifier.volume3en_AU
dc.language.isoenen_AU
dc.publisherRoyal Society of Chemistryen_AU
dc.subjectSolid oxide fuel cellsen_AU
dc.subjectCathodesen_AU
dc.subjectOxygenen_AU
dc.subjectNiobiumen_AU
dc.subjectTantalumen_AU
dc.subjectPerovskitesen_AU
dc.subjectOxidesen_AU
dc.titleA comparative study of SrCo0.8Nb0.2O3−δ and SrCo0.8Ta0.2O3−δ as low-temperature solid oxide fuel cell cathodes: effect of non-geometry factors on the oxygen reduction reactionen_AU
dc.typeJournal Articleen_AU
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