Table 2.
Average domain sizes for calcined samples (before reduction), fresh reduced catalysts and catalysts after reaction prepared by solid state reaction.
| Sample | Phase | hkl | 2·θ (°) | t (nm) | Phase | hkl | 2·θ (°) | t (nm) |
|---|---|---|---|---|---|---|---|---|
| CALCINED SAMPLES (BEFORE REDUCTION) | ||||||||
| Rh-Ni/CeO2 | CeO2 | 1-1-1 | 28.592 | 8.2 | NiO | 2-0-0 | 43.242 | 12.5 |
| Rh-Ni/La2O3 | La2O3 cubic | 4-0-0 | 30.733 | 6.4 | La2O3 hexag. | 0-1-1 | 29.381 | 8.6 |
| Rh-Ni/MgO | MgO | 2-0-0 | 42.878 | 29.6 | ||||
| Rh-Ni/ZrO2 | ZrO2 | 1-1-1 | 30.575 | 17.4 | ||||
| FRESH REDUCED CATALYSTS | ||||||||
| Rh-Ni/Al2O3 | Ni0 | 2-0-0 | 52.041 | 13.5 | ||||
| Rh-Ni/CeO2 | CeO2 | 1-1-1 | 28.548 | 11.3 | NiO | 0-1-2 | 43.261 | 19.4 |
| Rh-Ni/La2O3 | La2O3 hexag. | 0-1-1 | 29.8968 | 20.5 | Ni0 | 1-1-1 | 44.440 | 21.0 |
| Rh-Ni/MgO | MgO | 2-0-0 | 42.8532 | 22.0 | ||||
| Rh-Ni/ZrO2 | ZrO2 | 1-1-1 | 30.4207 | 15.8 | ||||
| CATALYSTS AFTER REACTION | ||||||||
| Rh-Ni/Al2O3 | Ni0 | 2-0-0 | 51.764 | 7.4 | ||||
| Rh-Ni/CeO2 | CeO2 | 1-1-1 | 28.804 | 17.2 | Ni0 | 1-1-1 | 44.7199 | 21.3 |
| Rh-Ni/La2O3 | La2O2CO3 | 1-0-3 | 30.614 | 21.4 | Ni0 | 2-2-0 | 75.8017 | 12.8 |
| Rh-Ni/MgO | MgO | 2-0-0 | 42.889 | 26.4 | ||||
| Rh-Ni/ZrO2 | ZrO2 | 1-0-1 | 30.218 | 20.7 | Ni0 | 1-1-1 | 44.3868 | 19.2 |