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Stability of van der Waals FePX₃ materials (X: S, Se) for water-splitting applications
Publikationstyp
Journal Article
Date Issued
2023-01
Sprache
English
Author(s)
Sharma, Sandhya
Panahi, Mohammad
Jin, Yichen
Yan, Mouhui
Jin, Yukun
Li, Kexin
Zeller, Patrick
Efimenko, Anna
Makarova, Anna
Smirnov, Dmitry
Paulus, Beate
Voloshina, Elena
Dedkov, Yuriy
Journal
Volume
10
Issue
1
Article Number
014008
Citation
2D Materials 10 (1): 014008 (2023-01)
Publisher DOI
Scopus ID
The interaction of high-quality transition metal trichalcogenides (TMTs) single crystals FePX₃ (X: S, Se) with water molecules is studied using near-edge x-ray absorption fine structure (NEXAFS) and x-ray photoelectron spectroscopy (XPS) in a wide range of temperature and partial pressure of H₂O. The physisorption nature of interaction between H₂O and FePX₃ is found at low temperatures and relatively small concentrations of water molecules, that is supported by the DFT results. When temperature of the FePX₃ samples and partial pressure of H₂O are increased, the interaction at the interface is defined by two competing processes—adsorption of molecules at high partial pressure of H₂O and desorption of molecules due to the increased surface mobility and physisorption nature of interaction. Our intensive XPS/NEXAFS experiments accompanied by DFT calculations bring new understanding on the interaction of H₂O with surface of a new class of 2D materials, TMTs, pointing to their stability and reactivity, that is important for further applications in different areas, like sensing and catalysis.
Subjects
adsorption
DFT
NAP-NEXAFS
NAP-XPS
surface
transition metal trichalcogenides
DDC Class
540: Chemistry
620: Engineering