Thermal investigation of Pd interface with molybdenum disulfide
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10492088" target="_blank" >RIV/00216208:11320/24:10492088 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=unCc_x0Rp6" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=unCc_x0Rp6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpcs.2024.112018" target="_blank" >10.1016/j.jpcs.2024.112018</a>
Alternative languages
Result language
angličtina
Original language name
Thermal investigation of Pd interface with molybdenum disulfide
Original language description
The thermal stability of molybdenum disulfide (MoS2) films, and particularly of the 1T-MoS2 metallic phase, plays a crucial role in their applicability across diverse technological fields. In this research, we successfully achieved a phase transition of multilayer MoS2 nanosheets from the semiconducting 2H phase to the metallic 1T phase through Pd substitution of Mo atoms on non-stoichiometric (sulfur-rich) MoS2 substrates and MoS2 hybrids with reduced graphene oxide (MoS2-rGO). This investigation involved studying the thermal stability of MoS2 thin films with mixed 1T-2H phases, up to 500 degrees C, in an ultra-high vacuum (UHV) environment. Our findings indicate that the 1T phase transforms to the 2H semiconducting stable phase at different temperatures, depending on the surface chemistry. In sulfur-rich substrates, the 1T phase remains present up to approximately 400 degrees C, while it vanishes on the stoichiometric MoS2-rGO films. Notably, enhanced thermal stability of the 1T phase is achieved with a sulfur surplus, regardless of the presence of rGO. Furthermore, during annealing, we observed Pd sintering, accompanied by a chemical state change from metallic Pd0 to Pd2+. These results elucidate the stability of 1T-MoS2 within an acceptable temperature range for the catalytic process and energy applications involving MoS2.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
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)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physics and Chemistry of Solids
ISSN
0022-3697
e-ISSN
1879-2553
Volume of the periodical
190
Issue of the periodical within the volume
Jul
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
112018
UT code for WoS article
001289132000001
EID of the result in the Scopus database
2-s2.0-85189020722