Oxidized core-shell MoO.sub.2./sub.-MoS.sub.2./sub. nanostructured thin films for hydrogen evolution

0531679 - FZÚ 2021 RIV US eng J - Journal Article
Kumar, Prabhat - Singh, M. - Reddy, G. B.
Oxidized core-shell MoO₂-MoS₂ nanostructured thin films for hydrogen evolution.
ACS Applied Nano Materials. Roč. 3, č. 1 (2020), s. 711-723. ISSN 2574-0970
Institutional support: RVO:68378271
Keywords : plasma-assisted sulfurization/oxidation * core−shell nanoflakes * hydrogen evolution * thin films and interfaces
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Impact factor: 5.097, year: 2020
Method of publishing: Limited access
https://doi.org/10.1021/acsanm.9b02235

Plasma-assisted incorporation of oxygen and oxidation of MoO2-MoS2 core-shell nanostructures is carried for different time durations (30, 45, and 60 min) in O-2 gas plasma in this work. The effects of O-2 plasma on morphological, structural, compositional, and optical properties have been investigated systematically. Both the physical and chemical effects of plasma on the MoS2 shell are observed, whereas the MoO(2 )core remained unaffected. HR-TEM images showed that reactive species had enough energy to break and rupture the MoS2 layers. XPS revealed that the incorporation of O-2 species from plasma resulted in different oxidation states of Mo. The oxygen-incorporated MoS2 in core-shell nanostructure demonstrates excellent hydrogen evolution reaction activity with high stability. A reaction mechanism is proposed describing the changes in morphology of the nanostructured thin films after exposure to O-2 plasma.
Permanent Link: http://hdl.handle.net/11104/0310302