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권영국

Kwon, Youngkook
Electrochemistry Lab for Energy and Environment
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dc.citation.number 10 -
dc.citation.title ADVANCED ENERGY MATERIALS -
dc.citation.volume 10 -
dc.contributor.author Jeong, Hyung Mo -
dc.contributor.author Kwon, Youngkook -
dc.contributor.author Won, Jong Ho -
dc.contributor.author Lum, Yanwei -
dc.contributor.author Cheng, Mu-Jeng -
dc.contributor.author Kim, Kwang Ho -
dc.contributor.author Head-Gordon, Martin -
dc.contributor.author Kang, Jeung Ku -
dc.date.accessioned 2023-12-21T17:50:54Z -
dc.date.available 2023-12-21T17:50:54Z -
dc.date.created 2020-02-10 -
dc.date.issued 2020-03 -
dc.description.abstract Copper (Cu) offers a means for producing value-added fuels through the electrochemical reduction of carbon dioxide (CO2), i.e., the CO2 reduction reaction (CO2RR), but designing Cu catalysts with significant Faradaic efficiency to C2+ products remains as a great challenge. This work demonstrates that the high activity and selectivity of Cu to C2+ products can be achieved by atomic-scale spacings between two facets of Cu particles. These spacings are created by lithiating CuOx particles, removing lithium oxides formed, and electrochemically reducing CuOx to metallic Cu. Also, the range of spacing (d(s)) is confirmed via the 3D tomographs using the Cs-corrected scanning transmission electron microscopy (3D tomo-STEM), and the operando X-ray absorption spectra show that oxidized Cu reduces to the metallic state during the CO2RR. Moreover, control of d(s) to 5-6 angstrom allows a current density exceeding that of unmodified CuOx nanoparticles by about 12 folds and a Faradaic efficiency of approximate to 80% to C2+. Density functional theory calculations support that d(s) of 5-6 angstrom maximizes the binding energies of CO2 reduction intermediates and promotes C-C coupling reactions. Consequently, this study suggests that control of d(s) can be used to realize the high activity and C2+ product selectivity for the CO2RR. -
dc.identifier.bibliographicCitation ADVANCED ENERGY MATERIALS, v.10, no.10 -
dc.identifier.doi 10.1002/aenm.201903423 -
dc.identifier.issn 1614-6832 -
dc.identifier.scopusid 2-s2.0-85078863977 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/31130 -
dc.identifier.url https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.201903423 -
dc.identifier.wosid 000510061400001 -
dc.language 영어 -
dc.publisher Wiley-VCH Verlag -
dc.title Atomic-Scale Spacing between Copper Facets for the Electrochemical Reduction of Carbon Dioxide -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter -
dc.relation.journalResearchArea Chemistry; Energy & Fuels; Materials Science; Physics -
dc.type.docType Article; Early Access -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Cu nanoparticles -
dc.subject.keywordAuthor C2+ fuels -
dc.subject.keywordAuthor CO2 reduction -
dc.subject.keywordAuthor C-C coupling reactions -
dc.subject.keywordAuthor 3D tomography -
dc.subject.keywordPlus TOTAL-ENERGY CALCULATIONS -
dc.subject.keywordPlus CO2 REDUCTION -
dc.subject.keywordPlus MECHANISTIC INSIGHTS -
dc.subject.keywordPlus ELECTROREDUCTION -
dc.subject.keywordPlus SELECTIVITY -
dc.subject.keywordPlus OXYGEN -
dc.subject.keywordPlus ETHYLENE -
dc.subject.keywordPlus MONOXIDE -
dc.subject.keywordPlus NANOCRYSTALS -
dc.subject.keywordPlus ELECTRODES -

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