Toward 2D van der Waals Entropy Mixture MX2 (M = Mo, W; X = S, Se, Te) for Hydrogen Evolution Electrocatalysis
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933856" target="_blank" >RIV/60461373:22310/25:43933856 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsami.5c05482" target="_blank" >https://pubs.acs.org/doi/10.1021/acsami.5c05482</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsami.5c05482" target="_blank" >10.1021/acsami.5c05482</a>
Alternative languages
Result language
angličtina
Original language name
Toward 2D van der Waals Entropy Mixture MX2 (M = Mo, W; X = S, Se, Te) for Hydrogen Evolution Electrocatalysis
Original language description
High-entropy alloys have emerged as a class of materials, offering unique properties due to their irregular and randomized arrangement of multiple elements in an ordered lattice. This concept has been extended to two-dimensional (2D) van der Waals materials, including transition metal dichalcogenides (TMD), which exhibit promising applications in electrocatalysis. In this work, we have explored the synthesis of entropy mixture crystals (TMDmix) involving the chemical vapor transport of five individual elements, Mo and W as metal elements, S, Se, and Te as chalcogenide elements, resulting in a crystalline structure with a controlled composition Mo0.56W0.44(S0.33Se0.35Te0.32)2, with an estimated Delta S mix of 0.96R. When observed along the [001] zone axis, STEM HAADF images indicate the presence of the different crystal phases of the 2D TMDs (1T, 2H, and 3R). Our findings demonstrate the potential of the entropy TMDmix materials as catalysts for the hydrogen evolution reaction, offering an alternative to noble metal-based catalysts. To maximize the potential of TMDmix, we chose chemical exfoliation with the resulting material being subdivided into size groups, big and small, according to their lateral size. In an acidic medium, the lowest overpotential of 127 mV and a Tafel slope of 79 mV/dec were obtained for the exfoliated sample with a small lateral size (exf-TMDsmall).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Applied Materials & Interfaces
ISSN
1944-8244
e-ISSN
1944-8252
Volume of the periodical
17
Issue of the periodical within the volume
24
Country of publishing house
US - UNITED STATES
Number of pages
11
Pages from-to
35522-35532
UT code for WoS article
001502848900001
EID of the result in the Scopus database
2-s2.0-105007471827