Ag2S-CoS hetero-nanowires terminated with stepped surfaces for improved oxygen evolution reaction

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dc.contributor.authorLee, Changsooko
dc.contributor.authorLee, Chulheeko
dc.contributor.authorShin, Kihyunko
dc.contributor.authorSong, Taeyoungko
dc.contributor.authorJeong, Hu Youngko
dc.contributor.authorJeon, Duk Youngko
dc.contributor.authorLee, Hyuck Moko
dc.date.accessioned2019-09-24T11:21:11Z-
dc.date.available2019-09-24T11:21:11Z-
dc.date.created2019-09-24-
dc.date.issued2019-09-
dc.identifier.citationCATALYSIS COMMUNICATIONS, v.129-
dc.identifier.issn1566-7367-
dc.identifier.urihttp://hdl.handle.net/10203/267653-
dc.description.abstractWater electrolysis has received great attention for producing hydrogen, but sluggish kinetics of oxygen evolution reaction (OER) has remained a big challenge. Recently, cobalt sulfide materials have been widely explored as great choice in highly efficient electrocatalysts due to their good electrical conductivity and bi-functionality toward OER and hydrogen evolution reaction (HER). However, cobalt sulfide shows outstanding HER activity, but its OER activity should be improved. Herein, hexagonal-phase cobalt sulfide (CoS) nano-wires with abundant stepped surfaces and defect sites were prepared via a seed-growth approach with silver sulfide (Ag2S) nanoparticles. The Ag2S-CoS hetero-nanowires (HNWs) exhibited excellent electrochemical performances for oxygen evolution reaction (overpotential = 275 mV, Tafel slope = 77.1 mVdec(-1), charge transfer resistance = 1.3 Omega) in 1.0 M KOH solution. The origin of superior activity was investigated using a combined experimental and theoretical approach. This work highlights the importance of surface defects for improving oxygen evolution reaction performance of water electrolysis.-
dc.languageEnglish-
dc.publisherELSEVIER-
dc.titleAg2S-CoS hetero-nanowires terminated with stepped surfaces for improved oxygen evolution reaction-
dc.typeArticle-
dc.identifier.wosid000484651800023-
dc.identifier.scopusid2-s2.0-85068393417-
dc.type.rimsART-
dc.citation.volume129-
dc.citation.publicationnameCATALYSIS COMMUNICATIONS-
dc.identifier.doi10.1016/j.catcom.2019.105749-
dc.contributor.localauthorJeon, Duk Young-
dc.contributor.localauthorLee, Hyuck Mo-
dc.contributor.nonIdAuthorLee, Changsoo-
dc.contributor.nonIdAuthorShin, Kihyun-
dc.contributor.nonIdAuthorJeong, Hu Young-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorCobalt sulfide-
dc.subject.keywordAuthorSeeded growth-
dc.subject.keywordAuthorStepped surface-
dc.subject.keywordAuthorOxygen evolution reaction-
dc.subject.keywordPlusHYDROGEN-PRODUCTION-
dc.subject.keywordPlusEFFICIENT-
dc.subject.keywordPlusCATALYST-
dc.subject.keywordPlusCOS-
dc.subject.keywordPlusOXIDATION-
dc.subject.keywordPlusOXIDES-
dc.subject.keywordPlusPHASE-
dc.subject.keywordPlusFOAM-
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