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Article: Preparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution

TitlePreparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution
Authors
Keywordshydrogen evolution
metallic 1T phase
MoS MoSSe 2,
nanodots
transition metal dichalcogenides
Issue Date2018
Citation
Advanced Materials, 2018, v. 30, n. 9, article no. 1705509 How to Cite?
AbstractNanostructured transition metal dichalcogenides (TMDs) are proven to be efficient and robust earth-abundant electrocatalysts to potentially replace precious platinum-based catalysts for the hydrogen evolution reaction (HER). However, the catalytic efficiency of reported TMD catalysts is still limited by their low-density active sites, low conductivity, and/or uncleaned surface. Herein, a general and facile method is reported for high-yield, large-scale production of water-dispersed, ultrasmall-sized, high-percentage 1T-phase, single-layer TMD nanodots with high-density active edge sites and clean surface, including MoS2, WS2, MoSe2, Mo0.5W0.5S2, and MoSSe, which exhibit much enhanced electrochemical HER performances as compared to their corresponding nanosheets. Impressively, the obtained MoSSe nanodots achieve a low overpotential of −140 mV at current density of 10 mA cm−2, a Tafel slope of 40 mV dec−1, and excellent long-term durability. The experimental and theoretical results suggest that the excellent catalytic activity of MoSSe nanodots is attributed to the high-density active edge sites, high-percentage metallic 1T phase, alloying effect and basal-plane Se-vacancy. This work provides a universal and effective way toward the synthesis of TMD nanostructures with abundant active sites for electrocatalysis, which can also be used for other applications such as batteries, sensors, and bioimaging.
Persistent Identifierhttp://hdl.handle.net/10722/329837
ISSN
2023 Impact Factor: 27.4
2023 SCImago Journal Rankings: 9.191
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTan, Chaoliang-
dc.contributor.authorLuo, Zhimin-
dc.contributor.authorChaturvedi, Apoorva-
dc.contributor.authorCai, Yongqing-
dc.contributor.authorDu, Yonghua-
dc.contributor.authorGong, Yue-
dc.contributor.authorHuang, Ying-
dc.contributor.authorLai, Zhuangchai-
dc.contributor.authorZhang, Xiao-
dc.contributor.authorZheng, Lirong-
dc.contributor.authorQi, Xiaoying-
dc.contributor.authorGoh, Min Hao-
dc.contributor.authorWang, Jie-
dc.contributor.authorHan, Shikui-
dc.contributor.authorWu, Xue Jun-
dc.contributor.authorGu, Lin-
dc.contributor.authorKloc, Christian-
dc.contributor.authorZhang, Hua-
dc.date.accessioned2023-08-09T03:35:41Z-
dc.date.available2023-08-09T03:35:41Z-
dc.date.issued2018-
dc.identifier.citationAdvanced Materials, 2018, v. 30, n. 9, article no. 1705509-
dc.identifier.issn0935-9648-
dc.identifier.urihttp://hdl.handle.net/10722/329837-
dc.description.abstractNanostructured transition metal dichalcogenides (TMDs) are proven to be efficient and robust earth-abundant electrocatalysts to potentially replace precious platinum-based catalysts for the hydrogen evolution reaction (HER). However, the catalytic efficiency of reported TMD catalysts is still limited by their low-density active sites, low conductivity, and/or uncleaned surface. Herein, a general and facile method is reported for high-yield, large-scale production of water-dispersed, ultrasmall-sized, high-percentage 1T-phase, single-layer TMD nanodots with high-density active edge sites and clean surface, including MoS2, WS2, MoSe2, Mo0.5W0.5S2, and MoSSe, which exhibit much enhanced electrochemical HER performances as compared to their corresponding nanosheets. Impressively, the obtained MoSSe nanodots achieve a low overpotential of −140 mV at current density of 10 mA cm−2, a Tafel slope of 40 mV dec−1, and excellent long-term durability. The experimental and theoretical results suggest that the excellent catalytic activity of MoSSe nanodots is attributed to the high-density active edge sites, high-percentage metallic 1T phase, alloying effect and basal-plane Se-vacancy. This work provides a universal and effective way toward the synthesis of TMD nanostructures with abundant active sites for electrocatalysis, which can also be used for other applications such as batteries, sensors, and bioimaging.-
dc.languageeng-
dc.relation.ispartofAdvanced Materials-
dc.subjecthydrogen evolution-
dc.subjectmetallic 1T phase-
dc.subjectMoS MoSSe 2,-
dc.subjectnanodots-
dc.subjecttransition metal dichalcogenides-
dc.titlePreparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adma.201705509-
dc.identifier.pmid29333655-
dc.identifier.scopuseid_2-s2.0-85040695325-
dc.identifier.volume30-
dc.identifier.issue9-
dc.identifier.spagearticle no. 1705509-
dc.identifier.epagearticle no. 1705509-
dc.identifier.eissn1521-4095-
dc.identifier.isiWOS:000426491600021-

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