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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM

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

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dc.contributor.author Lee, Changsoo ko
dc.contributor.author Lee, Chulhee ko
dc.contributor.author Shin, Kihyun ko
dc.contributor.author Song, Taeyoung ko
dc.contributor.author Jeong, Hu Young ko
dc.contributor.author Jeon, Duk Young ko
dc.contributor.author Lee, Hyuck Mo ko
dc.date.available 2019-07-31T06:17:56Z -
dc.date.created 2019-07-29 ko
dc.date.issued 2019-09 ko
dc.identifier.citation CATALYSIS COMMUNICATIONS, v.129, pp.105749 ko
dc.identifier.issn 1566-7367 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/27177 -
dc.description.abstract Water 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) nanowires 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 Ω) 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. ko
dc.language 영어 ko
dc.publisher Elsevier B.V. ko
dc.title Ag2S-CoS hetero-nanowires terminated with stepped surfaces for improved oxygen evolution reaction ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85068393417 ko
dc.type.rims ART ko
dc.identifier.doi 10.1016/j.catcom.2019.105749 ko
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S1566736719302110?via%3Dihub ko
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