X-ray photoelectron spectroscopy characterization of amorphous molybdenum oxysulfide thin films

Amorphous oxygen-rich molybdenum oxysulfide Decorated p-type silicon microwire Arrays for efficient photoelectrochemical water reduction

“…4 indicate the presence of four major components in Mo 3d spectra; for clarity, only the 3d 5/2 components are shown explicitly, while contributions from 3d 3/2 components are included in the total fit curves and shown explicitly in Figure S9 (SI). The assignments are clear from the literature for three out of four Mo 3d components that we observe for our samples: the Mo 3d 5/2 components at 229.8, 230.7, and 232.5 eV can be assigned as Mo 4 + , Mo 5 + , and Mo 6 + oxidation states, respectively [51][52][53]. The fourth component (Mo 3d 5/2 at 231.7 eV, red in Fig.…”

Improvement of HDS catalysts through the modification of the oxidic precursor with 1,5-pentanediol: Gas phase sulfidation and thiophene conversion

“…The Mo3d spectra were decomposed into the three well-known contributions respectively attributed to Mo VI oxide (Mo3d 5/2 BE ¼ 233.0 eV), Mo V oxysulfide (Mo3d 5/2 BE ¼ 230.5 eV) and Mo IV (MoS 2 ) (Mo3d 5/2 BE ¼ 228.8 eV) [39] (Fig. 1A).…”

Impact of potassium content on the structure of molybdenum nanophases in alumina supported catalysts and their performance in carbon monoxide hydrogenation

“…This suggests higher concentration of oxidised molybdenum species in potassium-promoted catalysts. The Mo 6+ and Mo 5+ present in the sulphided catalysts could be (i) produced during the passivation, (ii) due to the formation of a K 2 MoS 4 phase (also observed by XRD) where Mo exist as Mo 6+ , (iii) can be related to the formation of the oxysulphide species of the MoO 2 S 2 and MoOS 2 type [39], (iv) or due to the interaction of Mo and support resulting in Al 2 (MoO 4 ) 3 which is not sulphided under these conditions. The S 2p XPS spectra are relatively complex for the sulphided K Mo/Al 2 O 3 catalysts (Fig.…”