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WS2/p-Si-based photocathodes with high activity originated from the unique vertical geometry of the 2D WS2 nanoplatelets
  • Patel, Malkeshkumar ;
  • Nguyen, Thanh Tai ;
  • Kim, Jina ;
  • Kim, Joondong ;
  • Kim, Yu Kwon
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dc.contributor.authorPatel, Malkeshkumar-
dc.contributor.authorNguyen, Thanh Tai-
dc.contributor.authorKim, Jina-
dc.contributor.authorKim, Joondong-
dc.contributor.authorKim, Yu Kwon-
dc.date.issued2022-05-01-
dc.identifier.issn2452-2627-
dc.identifier.urihttps://aurora.ajou.ac.kr/handle/2018.oak/32625-
dc.identifier.urihttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85127333297&origin=inward-
dc.description.abstractEarth-abundant two-dimensional (2D) materials-based photocathodes for solar hydrogen production may replace conventional noble metal-based ones when they can be grown with a proper orientation and dimension for efficient charge transfer and catalytic reactions. Here, we show that WS2 films can be grown as wafer-scale films with unique vertically aligned 2H-WS2 nanoplatelets using a single-step vacuum deposition process directly on substrates such as Si wafer and F-doped tin oxide (FTO)/glass. The as-grown WS2/p-Si shows enhanced photocathode performances that are attributed to the unique vertical WS2 nanoplatelet structure, which endows excellent antireflection properties (reflectance as low as ∼ 4%) for enhanced absorption, high photocurrent density (ca. 37 mA cm−2) at low overpotential optimized by controlled vertical length, and catalytically active WS2 edge-sites exposed to the surface for excellent catalytic hydrogen evolution reaction (HER). The results suggest that the nanostructured WS2/p-Si heterostructures are promising multi-functional photocathodes for solar hydrogen production with excellent stability for long-term operation in ambient condition.-
dc.description.sponsorshipThis research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF- 2020R1A2C1009480 , NRF- 2020R1I1A1A01068573 , NRF- 2020H1D3A2A02085884 , NRF- 2020R1A2C1007227 and NRF- 2021R1A6A1A10044950 ).-
dc.language.isoeng-
dc.publisherElsevier B.V.-
dc.titleWS2/p-Si-based photocathodes with high activity originated from the unique vertical geometry of the 2D WS2 nanoplatelets-
dc.typeArticle-
dc.citation.titleFlatChem-
dc.citation.volume33-
dc.identifier.bibliographicCitationFlatChem, Vol.33-
dc.identifier.doi10.1016/j.flatc.2022.100361-
dc.identifier.scopusid2-s2.0-85127333297-
dc.identifier.urlhttps://www.journals.elsevier.com/flatchem-
dc.subject.keywordEdge exposed electrocatalyst-
dc.subject.keywordSolar hydrogen generation-
dc.subject.keywordWater splitting-
dc.subject.keywordWS2 nanoplatelets-
dc.subject.keywordWS2/p-Si photocathode-
dc.type.otherArticle-
dc.description.isoafalse-
dc.subject.subareaElectronic, Optical and Magnetic Materials-
dc.subject.subareaCeramics and Composites-
dc.subject.subareaSurfaces, Coatings and Films-
dc.subject.subareaMaterials Chemistry-
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