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

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dc.citation.articleNumber2314031
dc.citation.issueNumber25
dc.citation.journalTitleAdvanced Materials
dc.citation.volumeNumber36
dc.contributor.authorPark, Jiheon
dc.contributor.authorCho, Iaan
dc.contributor.authorJeon, Hotae
dc.contributor.authorLee, Youjin
dc.contributor.authorZhang, Jian
dc.contributor.authorLee, Dongwook
dc.contributor.authorCho, Min Kyung
dc.contributor.authorPreston, Daniel J.
dc.contributor.authorShong, Bonggeun
dc.contributor.authorKim, In Soo
dc.contributor.authorLee, Won-Kyu
dc.date.accessioned2024-08-02T13:32:07Z
dc.date.available2024-08-02T13:32:07Z
dc.date.issued2024
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.
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.202314031
dc.identifier.digitalConversion-of-Layered-WS2-Crystals
dc.identifier.doihttps://doi.org/10.1002/adma.202314031
dc.identifier.urihttps://hdl.handle.net/1911/117555
dc.language.isoeng
dc.publisherWiley
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.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleConversion of Layered WS2 Crystals into Mixed-Domain Electrochemical Catalysts by Plasma-Assisted Surface Reconstruction
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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