MoS2 stacking matters: 3R polytype significantly outperforms 2H MoS2 for the hydrogen evolution reaction

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922108" target="_blank" >RIV/60461373:22310/21:43922108 - isvavai.cz</a>
Alternative codes found
RIV/61388980:_____/21:00545897
Result on the web
<a href="https://pubs.rsc.org/en/content/articlehtml/2021/nr/d1nr03284d" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2021/nr/d1nr03284d</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d1nr03284d" target="_blank" >10.1039/d1nr03284d</a>

Result language
angličtina
Original language name
MoS2 stacking matters: 3R polytype significantly outperforms 2H MoS2 for the hydrogen evolution reaction
Original language description
Transition metal dichalcogenides (TMDs) are an intriguing family of materials with large application potential in a variety of scientific fields ranging from electronics to electrocatalysis. Within this group of materials, MoS2 has been attracting a lot of scientific attention due to its chemical and physical properties. In this report, we studied the exfoliation of the largely unexplored 3R MoS2 polytype prepared by high-temperature, high-pressure synthesis. Bulk as well as sodium naphthalenide exfoliated materials were studied in terms of their quality and performance for the hydrogen evolution reaction (HER). The HER performance was benchmarked versus the commonly available 2H polytype. The reported results show that the 3R polytype is more suitable for the conversion of MoS2 into the metallic 1T phase, which was attributed to surface oxidation occurring in the 2H polytype. Higher content of the 1T phase then resulted in an overall lower overpotential of -0.25 V vs. RHE for the 3R polytype compared with the overpotential of -0.30 V for the 2H polytype. These results show that the 3R polytype might serve as a better starting point for the synthesis of highly active chemically exfoliated MoS2 catalysts for hydrogen evolution.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
<a href="/en/project/GC20-16124J" target="_blank" >GC20-16124J: Two-dimensional layered transition metal dichalcogenides/ nanostructured carbons composites for electrochemical energy storage and conversion</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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