Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Phase-Engineering of 1T/2H Molybdenum Disulfide by Using Ionic Liquid for Enhanced Electrocatalytic Hydrogen Evolution
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2020
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
ChemElectroChem
ISSN
2196-0216
e-ISSN
—
Svazek periodika
7
Číslo periodika v rámci svazku
15
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
6
Strana od-do
3347-3352
Kód UT WoS článku
000563957400019
EID výsledku v databázi Scopus
2-s2.0-85089421174