XPS analysis of EC2 and CEB4 defined by the binding energy of peak component.
| EC2 | CEB4 | |||||||
|---|---|---|---|---|---|---|---|---|
| Components | C–C/C–H | C–N | C–O | C O | C–C/C–H | C–N/C–S | C–O | C O |
| Area% | 9.57 | 0 | 90.4 | 0 | 4.51 | 4.92 | 67.78 | 22.79 |
| Binding energy (eV) | 284.85 | 0 | 286.62 | 0 | 284.75 | 285.5 | 286.64 | 287.95 |
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