XPS fitting results of Mo 3d spectra of the sulfide catalysts with different modified methods.
| Catalysts | Mo4+ | Mo5+ | Mo6+ | S Mo b, % | |||
|---|---|---|---|---|---|---|---|
| ar%a (229.3 eV) | ar% (232.4 eV) | ar% (230.2 eV) | ar% (233.5 eV) | ar% (232.9 eV) | ar% (236.0 eV) | ||
| NiMo/Zr-in-F | 33.5 | 22.9 | 10.1 | 6.8 | 16.0 | 10.7 | 56.4 |
| NiMo/Zr-gra-F | 29.5 | 19.7 | 7.4 | 4.3 | 23.6 | 16.0 | 49.5 |
| NiMo/Zr-im-F | 32.8 | 21.9 | 10.3 | 6.9 | 16.9 | 11.2 | 54.7 |
| NiMo/FDU-12 | 25.9 | 19.6 | 10.0 | 6.7 | 22.7 | 15.1 | 45.5 |
a
ar% means the area percentage of XPS peak.
b
S Mo = Mosulfidation = Mo4+/(Mo4+ + Mo5+ + Mo6+).