Cation-Controlled Electrocatalytical Activity of Transition-Metal Disulfides
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F18%3A43915725" target="_blank" >RIV/60461373:22310/18:43915725 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/pdf/10.1021/acscatal.7b04233" target="_blank" >https://pubs.acs.org/doi/pdf/10.1021/acscatal.7b04233</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acscatal.7b04233" target="_blank" >10.1021/acscatal.7b04233</a>
Alternative languages
Result language
angličtina
Original language name
Cation-Controlled Electrocatalytical Activity of Transition-Metal Disulfides
Original language description
The nanostructured layered transition-metal dichalcogenides are highly promising materials for substitution of platinum metals in electrocatalysis. These layered materials are usually exfoliated with intercalation of Li from organolithium compounds. Alkali metal intercalation leads not only to exfoliation and increased surface area but also, even more importantly, to conversion of naturally occurring 2H (trigonal prismatic) semiconducting phase of MoS2/WS2 to IT octahedral conducting phase, which also exhibits better electrocatalytical performance. Surprisingly, even for the most broadly studied members like MoS2 and WS2, systematic work on their exfoliation is missing. We present a detailed study of MoS2 and WS2 exfoliation by intercalating cations of variable size (Li, Na, K, Rb, Cs). Alkali metal naphtalenides that are capable of producing single layer exfoliated dichalcogenides in quantitative yield were used. The results show strong dependence of dichalcogenide exfoliation on cation ionic radii. The cation has also a significant influence on the 1T/2H phase ratio in the resulting exfoliated materials. The overpotential and Tafel slopes directly correlate with the concentration of 1T phase. Our findings have broad fundamental implications as well as practical applications because by choosing the intercalating ion, one can tailor the exfoliation procedure.
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
10402 - Inorganic and nuclear chemistry
Result continuities
Project
<a href="/en/project/GA17-11456S" target="_blank" >GA17-11456S: Layered transition metal dichalcogenides nanostructures for electrocatalysis</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Catalysis
ISSN
2155-5435
e-ISSN
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Volume of the periodical
8
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
2774-2781
UT code for WoS article
000430154100018
EID of the result in the Scopus database
2-s2.0-85045107652