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Synergistic Effects of Nitrogen Doping on MXene for Enhancement of Hydrogen Evolution Reaction

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dc.contributor.authorThi Anh Le-
dc.contributor.authorQuoc Viet Bui-
dc.contributor.authorNgoc Quang Tran-
dc.contributor.authorYunhee Cho-
dc.contributor.authorYeseul Hong-
dc.contributor.authorYoshiyuki Kawazoe-
dc.contributor.authorHyoyoung Lee-
dc.date.available2019-11-13T07:32:05Z-
dc.date.created2019-10-21-
dc.date.issued2019-10-
dc.identifier.issn2168-0485-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/6415-
dc.description.abstract© 2019 American Chemical Society.Earth-abundant, nonprecious, and efficient electrocatalysts for effective hydrogen evolution reaction (HER) are crucial for future large-scale green energy production. Low-cost two-dimensional MXenes have been widely studied in energy-storage devices owing to their unique chemical and physical properties and have recently attracted scientists in the electrocatalysis field. Nevertheless, their electrocatalytic activity still remains unsatisfactory. Herein, we present a facile and general strategy using ammonia heat treatment to enhance the hydrogen evolution catalysis of Ti3C2Tx MXenes by modification with a nitrogen heteroatom. Importantly, our approach is focused on revealing: (1) the contribution of all possible incorporated N species including Ti-N, N-H, and N in O-Ti-N, rather than considering only that of Ti-Nx motifs as previously reported for N-doped MXene electrocatalysts, and their role in inducing a change in the electronic configuration of the as-prepared catalysts, which then leads to increased electrical conductivity and improved intrinsic catalytic reactivity; and (2) the importance of controlling the proper amount of N obtained at a suitable calcined temperature to assist the shift of the Gibbs free energy for hydrogen adsorption (Î"Had*) approaching 0 eV (ideal value), as proved by the density functional theory. Moreover, experimental findings indicate that nitrogen-doped Ti3C2Tx annealed at 600 °C shows superior improved HER electrocatalytic performance compared to pristine Ti3C2Tx, with an onset potential of -30 mV and an overpotential as low as 198 at 10 mA cm-2, as well as a much smaller Tafel slope of 92 mV dec--
dc.language영어-
dc.publisherAMER CHEMICAL SOC-
dc.subject2D materials-
dc.subjectDFT calculations-
dc.subjecthydrogen evolution reaction-
dc.subjectMXene-based electrocatalysts-
dc.subjectnitrogen-doped-
dc.titleSynergistic Effects of Nitrogen Doping on MXene for Enhancement of Hydrogen Evolution Reaction-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000489986400114-
dc.identifier.scopusid2-s2.0-85073011221-
dc.identifier.rimsid70281-
dc.contributor.affiliatedAuthorThi Anh Le-
dc.contributor.affiliatedAuthorNgoc Quang Tran-
dc.contributor.affiliatedAuthorYunhee Cho-
dc.contributor.affiliatedAuthorHyoyoung Lee-
dc.identifier.doi10.1021/acssuschemeng.9b04470-
dc.identifier.bibliographicCitationACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.7, no.19, pp.16879 - 16888-
dc.relation.isPartOfACS SUSTAINABLE CHEMISTRY & ENGINEERING-
dc.citation.titleACS SUSTAINABLE CHEMISTRY & ENGINEERING-
dc.citation.volume7-
dc.citation.number19-
dc.citation.startPage16879-
dc.citation.endPage16888-
dc.description.journalClass1-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalWebOfScienceCategoryChemistry, Multidisciplinary-
dc.relation.journalWebOfScienceCategoryGreen & Sustainable Science & Technology-
dc.relation.journalWebOfScienceCategoryEngineering, Chemical-
dc.subject.keywordPlusTITANIUM CARBIDE MXENE-
dc.subject.keywordPlusEFFICIENT ELECTROCATALYST-
dc.subject.keywordPlusNANOSHEETS-
dc.subject.keywordPlusCARBON-
dc.subject.keywordPlusELECTRODES-
dc.subject.keywordPlusPHOSPHIDE-
dc.subject.keywordAuthor2D materials-
dc.subject.keywordAuthorMXene-based electrocatalysts-
dc.subject.keywordAuthornitrogen-doped-
dc.subject.keywordAuthorhydrogen evolution reaction-
dc.subject.keywordAuthorDFT calculations-
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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