Table 3. XPS Peak Spectra along with Peak Positions.
| element | peak splitting | peak positions (eV) | references |
|---|---|---|---|
| molybdenum (Mo) | Mo 3d5/2 (Mo4+) | 229.7 | (11, 15, 17, 21, 22, 24, 25) |
| Mo 3d3/2 (Mo4+) | 230.2 | ||
| Mo 3d3/2 (Mo6+) | 233.1 | ||
| sulfur (S) | S 2p1/2 | 165.8 | (11, 15, 17, 21, 22, 24, 25) |
| S 2p3/2 | 167.0 | ||
| iron (Fe2+ and Fe3+) | Fe 2p1/2 | 711.4 | (2, 7, 15, 17, 19) |
| Fe 2p1/2 | 713.2 | ||
| oxygen (O) | O 1s | 527.7 | (2, 7, 15, 17) |
| 529.1 | |||
| chromium (Cr) | Cr 2p1/2 | 574.5 | (2, 5, 24, 25, 33, 34) |
| Cr 2p1/2 | 573.4 | ||
| Cr 2p1/2 | 583.8 |