XPS analysis of lithium intercalation in thin films of molybdenum oxysulphides

Abstract

Thin films of molybdenum oxysulphides which could be used as positive electrode materials in microbatteries were analysed by XPS. The results have shown the existence of a new environment for molybdenum with S,'--pairs, S2-and 02-ions. The evolution of these thin films MoOySz at different stages of their cycle in experimental generators has also been studied; the main elements involved in the redox processes have been characterized: molybdenum atoms with + 6 formal oxidation number and disulphide pairs S:-.

The Potential of Tribological Application of DLC/MoS2 Coated Sealing Materials

“…This means, different types of sulfur ligands, such as bridging terminal S 2 2− , and bridging S 2− species exist in the coating [37]. In addition, our results were in agreement with Benoist et al observations as a higher oxygen content lead to a decrease in the S 2− sulphur component whereas the S 2 2− pair increase [43]. In pure MoS2 coatings, the high nitrogen and carbon amounts are attributed to atmospheric contaminations (CO2, hydrocarbons, N2, etc.)…”

“…However, the S 2p doublet at 162.0 eV (ΔeV = 1.18) in combination with the doublet at 229.0 eV and 232.1 eV is unambiguous assigned to MoS2 (Figure 1c,d). A second doublet in the Mo 3d spectra is attributed to Mo with environment as in MoO3 [43]. On the subject of oxidation of molybdenum disulfide to molybdenum (VI) oxide, different reports were found [15,44].…”

Ultrathin S-doped MoSe2nanosheets for efficient hydrogen evolution

“…Peaks at 160.8 eV and 166.8 eV are attributed to Se 3p 3/2 and 3p 1/2 , respectively. 34 Whereas the other two peaks at 162.4 eV and 163.8 eV correspond to binding energies of S 2p 3/2 and 2p 1/2 in MoS 2 , suggesting the existence of Mo-S bonding instead of elemental S. 35,36 And, it is also an indication of substitutional doping of S to Se instead of S occupying the interstitial sites of MoSe 2 . The peak at 55 eV is attributed to Se 3d 3/2 (Fig.…”

Effect of H2O2 on the Separation of Mo-Bi-Containing Ore by Flotation

“…The 2s spectra located at 226.9 eV belongs to MoS 2 species [42]. The S 2p spectra depicted in Figure 13B match the binding energy of molybdenite at 162.6 eV and 163.8 eV for 2p 3/2 and 2p 1/2 [43,44], respectively. The Mo 3d spectra and S 2p spectra do not show any shifting in energy binding and there is no indication of oxide of molybdenum and sulfur species after H 2 O 2 treatment on molybdenite surface.…”