The Origin of MoS2 Significantly Influences Its Performance for the Hydrogen Evolution Reaction due to Differences in Phase Purity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913394" target="_blank" >RIV/60461373:22310/17:43913394 - isvavai.cz</a>

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1002/chem.201605343/full" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1002/chem.201605343/full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/chem.201605343" target="_blank" >10.1002/chem.201605343</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Origin of MoS2 Significantly Influences Its Performance for the Hydrogen Evolution Reaction due to Differences in Phase Purity

Popis výsledku v původním jazyce

Molybdenum disulfide (MoS2) is at the forefront of materials research. It shows great promise for electrochemical applications, especially for hydrogen evolution reaction (HER) catalysis. There is a significant discrepancy in the literature on the reported catalytic activity for HER catalysis on MoS2. Here we test the electrochemical performance of MoS2 obtained from seven sources and we show that these sources provide MoS2 of various phase purity (2H and 3R, and their mixtures) and composition, which is responsible for their different electrochemical properties. The overpoten-tials for HER at -10 mAcm(-2) for MoS2 from seven different sources range from -0.59 V to -0.78 V vs. reversible hydrogen electrode (RHE). This is of very high importance as with much interest in 2D-MoS2, the use of the top-down approach would usually involve the application of commercially available MoS2. These commercially available MoS2 are rarely characterized for composition and phase purity. These key parameters are responsible for large variance of reported catalytic properties of MoS2.

Název v anglickém jazyce

The Origin of MoS2 Significantly Influences Its Performance for the Hydrogen Evolution Reaction due to Differences in Phase Purity

Popis výsledku anglicky

Molybdenum disulfide (MoS2) is at the forefront of materials research. It shows great promise for electrochemical applications, especially for hydrogen evolution reaction (HER) catalysis. There is a significant discrepancy in the literature on the reported catalytic activity for HER catalysis on MoS2. Here we test the electrochemical performance of MoS2 obtained from seven sources and we show that these sources provide MoS2 of various phase purity (2H and 3R, and their mixtures) and composition, which is responsible for their different electrochemical properties. The overpoten-tials for HER at -10 mAcm(-2) for MoS2 from seven different sources range from -0.59 V to -0.78 V vs. reversible hydrogen electrode (RHE). This is of very high importance as with much interest in 2D-MoS2, the use of the top-down approach would usually involve the application of commercially available MoS2. These commercially available MoS2 are rarely characterized for composition and phase purity. These key parameters are responsible for large variance of reported catalytic properties of MoS2.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA16-05167S" target="_blank" >GA16-05167S: Použití iontových svazků pro modifikace struktur založených na grafenu</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Chemistry A European Journal

ISSN

0947-6539

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

3169-3177

Kód UT WoS článku

000395774700025

EID výsledku v databázi Scopus

2-s2.0-85012041036