Surface atomic concentration of different catalyst samples.
| Catalysts | Oβ/(Oα + Oβ + Oγ)% | Mn4+/(Mn2+ + Mn3+ + Mn4+)% | Mn3+/(Mn2+ + Mn3+ + Mn4+)% |
|---|---|---|---|
| 5Mn/AC | 33.907 | 38.983 | 33.876 |
| 7Mn/AC | 76.257 | 51.771 | 45.762 |
| 9Mn/AC | 73.563 | 27.790 | 36.560 |
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