Variation of nitrogen species in zeolite-templated carbon by low-temperature carbonization of pyrrole and the effect on oxygen reduction activity

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dc.contributor.authorHan, Seung Wonko
dc.contributor.authorBang, Jisukko
dc.contributor.authorKo, Seung Hyeonko
dc.contributor.authorRyoo, Ryongko
dc.date.accessioned2019-05-02T03:10:08Z-
dc.date.available2019-05-02T03:10:08Z-
dc.date.created2019-04-29-
dc.date.created2019-04-29-
dc.date.issued2019-04-
dc.identifier.citationJOURNAL OF MATERIALS CHEMISTRY A, v.7, no.14, pp.8353 - 8360-
dc.identifier.issn2050-7488-
dc.identifier.urihttp://hdl.handle.net/10203/261719-
dc.description.abstractNitrogen-doped microporous carbons with various compositions of pyridinic, pyrrolic, and graphitic N species were synthesized by the pyrolysis of pyrrole using Ca2+ ion-exchanged Y zeolite as a template. The Ca2+ ions in zeolite pores served as a catalyst to lower the carbonization temperature, resolving the problems associated with high carbonization temperature, such as inhomogeneous carbon deposition, easy breakage of weak C-N bonds, and preferential formation of thermodynamically stable graphitic N species. The resultant carbons exhibited a 3D microporous structure with high surface area and uniform micropore diameters, as well as high N content (5-6 wt%). Taking advantage of the lowered carbonization temperature, the ratio of the N species was modulated by the carbonization temperature, while a similar pore structure of the carbons was maintained. These N-doped carbons were used to investigate the efficiency of each N species on the electrochemical oxygen reduction, without the influences from the porous structure of the carbons. The results of this electrochemical investigation indicate that the graphitic N was more effective in enhancing the oxygen-reduction performance of the 3D microporous carbons than pyridinic N.-
dc.languageEnglish-
dc.publisherROYAL SOC CHEMISTRY-
dc.titleVariation of nitrogen species in zeolite-templated carbon by low-temperature carbonization of pyrrole and the effect on oxygen reduction activity-
dc.typeArticle-
dc.identifier.wosid000464414200035-
dc.identifier.scopusid2-s2.0-85063930971-
dc.type.rimsART-
dc.citation.volume7-
dc.citation.issue14-
dc.citation.beginningpage8353-
dc.citation.endingpage8360-
dc.citation.publicationnameJOURNAL OF MATERIALS CHEMISTRY A-
dc.identifier.doi10.1039/c9ta01621j-
dc.contributor.localauthorRyoo, Ryong-
dc.contributor.nonIdAuthorKo, Seung Hyeon-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusMETAL-FREE ELECTROCATALYSTS-
dc.subject.keywordPlusDOPED GRAPHENE-
dc.subject.keywordPlusPOROUS CARBON-
dc.subject.keywordPlusMESOPOROUS CARBON-
dc.subject.keywordPlusNANOPOROUS CARBON-
dc.subject.keywordPlusRECENT PROGRESS-
dc.subject.keywordPlusSITES-
dc.subject.keywordPlusTRANSFORMATION-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusCATALYSTS-
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