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Quantities of surface oxygen species based on XPS.
| Catalyst | O 1s B.E (eV)/Relative Amount (%) | (O2− + O22−)/O2− | |||
|---|---|---|---|---|---|
| O2− | CO32− | O22− | O2− | ||
| Ni/La2Ce2O7(CP 500) | 533.0/7.80 | 531.4/40.16 | 530.0/13.39 | 528.7/38.64 | 0.54 |
| Ni/La2Ce2O7(CP 600) | 533.0/8.63 | 531.3/43.50 | 529.6/12.16 | 528.6/35.7 | 0.58 |
| Ni/La2Ce2O7(CP 700) | 533.1/2.89 | 531.3/52.43 | 529.4/7.55 | 528.6/37.12 | 0.28 |
