Table 1. physicochemical property of Ce-R, Ce-P and Ce-F.
Catalyst | Lattice parameter (Å) | SBET (m2·g−1) | T1a (°C) | T2b (°C) | HT1c (mmol·gcat−1) | HT2d (mmol·gcat−1) | Oα1/Oβe | Ce3+ f (%·atom) |
---|---|---|---|---|---|---|---|---|
Ce-R | 5.4375 | 80 | 483 | 798 | 0.72 | 0.45 | 0.87 | 25.1 |
Ce-P | 5.4113 | 88 | 483 | 745 | 0.48 | 0.43 | 0.74 | 16.5 |
Ce-F | 5.4164 | 62 | 497 | 768 | 0.61 | 0.39 | 0.77 | 19.1 |
aThe top temperature of the low-temperature peak.
bThe top temperature of the high-temperature peak.
cThe hydrogen consumption at 300–600 °C.
dThe hydrogen consumption at 700–900 °C.
eFrom O 1s of XPS analysis.
fFrom Ce 3d of XPS analysis.