ZHANG, X., H. LI, H. YANG, F. XIE, Z.H. YUAN, Lenka ZAJÍČKOVÁ and W.J. LI. Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution. ChemElectroChem. WEINHEIM: WILEY-V C H VERLAG GMBH, 2020, vol. 7, No 15, p. 3347-3352. ISSN 2196-0216. Available from: https://dx.doi.org/10.1002/celc.202000745.
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Basic information
Original name Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution
Authors ZHANG, X., H. LI, H. YANG, F. XIE, Z.H. YUAN, Lenka ZAJÍČKOVÁ (203 Czech Republic, guarantor, belonging to the institution) and W.J. LI.
Edition ChemElectroChem, WEINHEIM, WILEY-V C H VERLAG GMBH, 2020, 2196-0216.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10405 Electrochemistry
Country of publisher Switzerland
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 4.590
RIV identification code RIV/00216224:14740/20:00118390
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.1002/celc.202000745
UT WoS 000563957400019
Keywords in English molybdenum disulfide; ionic liquid; 1T phase; phase engineering; electrocatalytic hydrogen evolution
Tags rivok
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavla Foltynová, Ph.D., učo 106624. Changed: 15/3/2021 19:29.
Abstract
Two-dimensional (2D) molybdenum disulfide (MoS2) has been regarded as an attractive non-precious-metal electrocatalyst for the hydrogen evolution reaction (HER). Engineering the crystal phase of MoS(2)to activate the basal planes/edges and simultaneously improve the electronic conductivity is currently an effective strategy for enhancing its HER activity. Herein, we report a facile and efficient hydrothermal route to prepare 1T/2H-MoS(2)catalysts using ionic liquid (N-butyl pyridinium bromide, [BPy]Br) as a structure-directing agent, where the large steric hindrance of [BPy]Br and the mutual pi-stacking interaction induce the phase transition of MoS(2)from 2H to the 1T phase. By adding a suitable amount of [BPy]Br in the reaction system, the portion of the 1T phase in 1T/2H-MoS(2)was increased, which can expose more active sites on its basal planes/edges as well as facilitate charge transfer for the HER. Consequently, 1T/2H-MoS(2)with the 1T portion of 91.9 % exhibits a significantly enhanced HER activity compared to that of the MoS(2)synthesized without the aid of [BPy]Br, in terms of a lower Tafel slope of 59 mV dec(-1). This synthesis strategy provides valuable guidance for designing the phase structure of MoS2-based electrocatalysts to achieve high HER efficiency.
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