Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F20%3A00118390" target="_blank" >RIV/00216224:14740/20:00118390 - isvavai.cz</a>

Result on the web

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/celc.202000745" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/celc.202000745</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/celc.202000745" target="_blank" >10.1002/celc.202000745</a>

Result language

angličtina

Original language name

Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

ChemElectroChem

ISSN

2196-0216

e-ISSN

—

Volume of the periodical

7

Issue of the periodical within the volume

15

Country of publishing house

CH - SWITZERLAND

Number of pages

6

Pages from-to

3347-3352

UT code for WoS article

000563957400019

EID of the result in the Scopus database

2-s2.0-85089421174