Phase controlled synthesis of transition metal carbide nanocrystals by ultrafast flash Joule heating

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dc.citation.articleNumber262en_US
dc.citation.journalTitleNature Communicationsen_US
dc.citation.volumeNumber13en_US
dc.contributor.authorDeng, Bingen_US
dc.contributor.authorWang, Zheen_US
dc.contributor.authorChen, Weiyinen_US
dc.contributor.authorLi, John Tiancien_US
dc.contributor.authorLuong, Duy Xuanen_US
dc.contributor.authorCarter, Robert A.en_US
dc.contributor.authorGao, Guanhuien_US
dc.contributor.authorYakobson, Boris I.en_US
dc.contributor.authorZhao, Yufengen_US
dc.contributor.authorTour, James M.en_US
dc.contributor.orgSmalley-Curl Instituteen_US
dc.contributor.orgNanoCarbon Center and the Welch Institute for Advanced Materialsen_US
dc.date.accessioned2022-01-27T20:24:13Zen_US
dc.date.available2022-01-27T20:24:13Zen_US
dc.date.issued2022en_US
dc.description.abstractNanoscale carbides enhance ultra-strong ceramics and show activity as high-performance catalysts. Traditional lengthy carburization methods for carbide syntheses usually result in coked surface, large particle size, and uncontrolled phase. Here, a flash Joule heating process is developed for ultrafast synthesis of carbide nanocrystals within 1 s. Various interstitial transition metal carbides (TiC, ZrC, HfC, VC, NbC, TaC, Cr2C3, MoC, and W2C) and covalent carbides (B4C and SiC) are produced using low-cost precursors. By controlling pulse voltages, phase-pure molybdenum carbides including β-Mo2C and metastable α-MoC1-x and η-MoC1-x are selectively synthesized, demonstrating the excellent phase engineering ability of the flash Joule heating by broadly tunable energy input that can exceed 3000 K coupled with kinetically controlled ultrafast cooling (>104 K s−1). Theoretical calculation reveals carbon vacancies as the driving factor for topotactic transition of carbide phases. The phase-dependent hydrogen evolution capability of molybdenum carbides is investigated with β-Mo2C showing the best performance.en_US
dc.identifier.citationDeng, Bing, Wang, Zhe, Chen, Weiyin, et al.. "Phase controlled synthesis of transition metal carbide nanocrystals by ultrafast flash Joule heating." <i>Nature Communications,</i> 13, (2022) Springer Nature: https://doi.org/10.1038/s41467-021-27878-1.en_US
dc.identifier.digitals41467-021-27878-1en_US
dc.identifier.doihttps://doi.org/10.1038/s41467-021-27878-1en_US
dc.identifier.urihttps://hdl.handle.net/1911/111955en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titlePhase controlled synthesis of transition metal carbide nanocrystals by ultrafast flash Joule heatingen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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