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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Oxygen-deficient triple perovskites as highly active and durable bifunctional electrocatalysts for oxygen electrode reactions

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dc.contributor.authorKim, Nam-Inko
dc.contributor.authorSa, Young Jinko
dc.contributor.authorChoi, Sung Ryulko
dc.contributor.authorAfzal, Rana Arslanko
dc.contributor.authorChoi, Taekjibko
dc.contributor.authorSeo, Young-Sooko
dc.contributor.authorLee, Kug-Seungko
dc.contributor.authorHwang, Jun Yeonko
dc.contributor.authorChoi, Woo Seokko
dc.contributor.authorJoo, Sang Hoonko
dc.contributor.authorPark, Jun-Youngko
dc.date.available2018-06-19T00:50:30Z-
dc.date.created2018-06-19ko
dc.date.issued201806ko
dc.identifier.citationSCIENCE ADVANCES, v.4, no.6, pp.eaap9360 -ko
dc.identifier.issn2375-2548ko
dc.identifier.urihttp://scholarworks.unist.ac.kr/handle/201301/24229-
dc.identifier.urihttp://advances.sciencemag.org/content/4/6/eaap9360.fullko
dc.description.abstractHighly active and durable bifunctional oxygen electrocatalysts have been of pivotal importance for renewable energy conversion and storage devices, such as unitized regenerative fuel cells and metal-air batteries. Perovskite-based oxygen electrocatalysts have emerged as promising nonprecious metal bifunctional electrocatalysts, yet their catalytic activity and stability still remain to be improved. We report a high-performance oxygen electrocatalyst based on a triple perovskite, Nd1.5Ba1.5CoFeMnO9−δ (NBCFM), which shows superior activity and durability for oxygen electrode reactions to single and double perovskites. When hybridized with nitrogen-doped reduced graphene oxide (N-rGO), the resulting NBCFM/N-rGO catalyst shows further boosted bifunctional oxygen electrode activity (0.698 V), which surpasses that of Pt/C (0.801 V) and Ir/C (0.769 V) catalysts and which, among the perovskite-based electrocatalysts, is the best activity reported to date. The superior catalytic performances of NBCFM could be correlated to its oxygen defect–rich structure, lower charge transfer resistance, and smaller hybridization strength between O 2p and Co 3d orbitals.ko
dc.languageENGko
dc.publisherAMER ASSOC ADVANCEMENT SCIENCEko
dc.titleOxygen-deficient triple perovskites as highly active and durable bifunctional electrocatalysts for oxygen electrode reactionsko
dc.typeARTICLEko
dc.identifier.pid1022null
dc.identifier.rimsid30425ko
dc.identifier.scopusid2-s2.0-85049153451ko
dc.identifier.wosid000443175500015ko
dc.type.rimsAko
dc.identifier.doihttp://dx.doi.org/10.1126/sciadv.aap9360ko
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