Conversion of Layered WS2 Crystals into Mixed-Domain Electrochemical Catalysts by Plasma-Assisted Surface Reconstruction

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dc.citation.articleNumber2314031en_US
dc.citation.issueNumber25en_US
dc.citation.journalTitleAdvanced Materialsen_US
dc.citation.volumeNumber36en_US
dc.contributor.authorPark, Jiheonen_US
dc.contributor.authorCho, Iaanen_US
dc.contributor.authorJeon, Hotaeen_US
dc.contributor.authorLee, Youjinen_US
dc.contributor.authorZhang, Jianen_US
dc.contributor.authorLee, Dongwooken_US
dc.contributor.authorCho, Min Kyungen_US
dc.contributor.authorPreston, Daniel J.en_US
dc.contributor.authorShong, Bonggeunen_US
dc.contributor.authorKim, In Sooen_US
dc.contributor.authorLee, Won-Kyuen_US
dc.date.accessioned2024-08-02T13:32:07Zen_US
dc.date.available2024-08-02T13:32:07Zen_US
dc.date.issued2024en_US
dc.description.abstractElectrocatalytic water splitting is crucial to generate clean hydrogen fuel, but implementation at an industrial scale remains limited due to dependence on expensive platinum (Pt)-based electrocatalysts. Here, an all-dry process to transform electrochemically inert bulk WS2 into a multidomain electrochemical catalyst that enables scalable and cost-effective implementation of the hydrogen evolution reaction (HER) in water electrolysis is reported. Direct dry transfer of WS2 flakes to a gold thin film deposited on a silicon substrate provides a general platform to produce the working electrodes for HER with tunable charge transfer resistance. By treating the mechanically exfoliated WS2 with sequential Ar-O2 plasma, mixed domains of WS2, WO3, and tungsten oxysulfide form on the surfaces of the flakes, which gives rise to a superior HER with much greater long-term stability and steady-state activity compared to Pt. Using density functional theory, ultraefficient atomic sites formed on the constituent nanodomains are identified, and the quantification of atomic-scale reactivities and resulting HER activities fully support the experimental observations.en_US
dc.identifier.citationPark, J., Cho, I., Jeon, H., Lee, Y., Zhang, J., Lee, D., Cho, M. K., Preston, D. J., Shong, B., Kim, I. S., & Lee, W.-K. (2024). Conversion of Layered WS2 Crystals into Mixed-Domain Electrochemical Catalysts by Plasma-Assisted Surface Reconstruction. Advanced Materials, 36(25), 2314031. https://doi.org/10.1002/adma.202314031en_US
dc.identifier.digitalConversion-of-Layered-WS2-Crystalsen_US
dc.identifier.doihttps://doi.org/10.1002/adma.202314031en_US
dc.identifier.urihttps://hdl.handle.net/1911/117555en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license.  Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleConversion of Layered WS2 Crystals into Mixed-Domain Electrochemical Catalysts by Plasma-Assisted Surface Reconstructionen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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