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| Precursor sample |
Na2MoO4·2H2O (25 mM) (ml) |
NiSO4·6H2O (25 mM) (ml) |
l-Cys (132 mM) (ml) |
| MoS2 | 20 | 0 | 20 |
| Ni-Mo-S (Ni/Mo, 1:3) | 15 | 5 | 20 |
| Ni-Mo-S (Ni/Mo, 1:1) | 10 | 10 | 20 |
| Ni-Mo-S (Ni/Mo, 3:1) | 5 | 15 | 20 |
| NiSx | 0 | 20 | 20 |
