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Kim, Guntae
GUNS Lab
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  • Solid Oxide Fuel Cells (SOFCs)& SOE, metal-air batteries, ceramic membranes, PEMFC

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Fe@C2N: A highly-efficient indirect-contact oxygen reduction catalyst

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dc.contributor.authorMahmood, Javeedko
dc.contributor.authorLi, Fengko
dc.contributor.authorKim, Changminko
dc.contributor.authorChoi, Hyun-Jungko
dc.contributor.authorGwon, Ohhunko
dc.contributor.authorJung, Sun-Minko
dc.contributor.authorSeo, Jeong-Minko
dc.contributor.authorCho, Sung-Jungko
dc.contributor.authorJu, Young-Wanko
dc.contributor.authorJeong, Hu-Youngko
dc.contributor.authorKim, Guntaeko
dc.contributor.authorBaek, Jong-Beomko
dc.date.available2018-01-05T00:35:47Z-
dc.date.created2018-01-02ko
dc.date.issued201802ko
dc.identifier.citationNANO ENERGY, v.44, no., pp.304 - 310ko
dc.identifier.issn2211-2855ko
dc.identifier.urihttp://scholarworks.unist.ac.kr/handle/201301/23138-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S2211285517307449ko
dc.description.abstractConverting unstable earth-abundant group VIIIB transition metals into stable catalysts with high oxygen reduction reaction (ORR) performances remains a critical challenge for electrochemical technologies. Iron (Fe)-nitrogen (N)-carbon (C)-based electrocatalysts have recently demonstrated ORR performances comparable to platinum (Pt)-based catalysts. However, as their poor stability remains a critical issue, which needs to be resolved to satisfy commercial requirements. Here, we describe a methodology for preparing a high-performance and stable Fe-based ORR catalyst. The catalyst was obtained by the in-situ sandwiching of a Fe3+ precursor in a nitrogenated holey two-dimensional network (denoted as C2N). Reduction of the sandwiched Fe3+ results in the formation of Fe oxide (FexOy) nanoparticles, which are simultaneously transformed into highly crystalline Fe0 nanoparticle cores, while the C2N is catalysed into well-defined, encapsulating, nitrogenated graphitic shells (Fe@C2N nanoparticles) during heat-treatment. The resultant Fe0@C2N nanoparticles are uniformly distributed on the C2N substrate, becoming the Fe@C2N catalyst, which displayed ORR activities superior to commercial Pt/C in both acidic and alkaline media. Furthermore, the Fe@C2N catalyst remained rust-free during harsh electrochemical testing even after 650 h, suggesting that its unusual durability originates from indirect-contact electrocatalysis.ko
dc.languageENGko
dc.publisherElsevier BVko
dc.subjectC2Nko
dc.subjectFe electrocatalystko
dc.subjectFe@C2Nko
dc.subjectEncapsulationko
dc.subjectIndirect-contactko
dc.subjectORRko
dc.subjectStabilityko
dc.titleFe@C2N: A highly-efficient indirect-contact oxygen reduction catalystko
dc.typeARTICLEko
dc.identifier.pid1056null
dc.identifier.pid1076null
dc.identifier.pid1053null
dc.identifier.rimsid29554ko
dc.identifier.scopusid2-s2.0-85038033171ko
dc.identifier.wosid000419833900035ko
dc.type.rimsAko
dc.identifier.doihttp://dx.doi.org/10.1016/j.nanoen.2017.11.057ko
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