Table 2. Defect Properties and Reducibility of Morphologically Controlled Ceria.
| sample | F2g banda/cm–1 | F2g fwhma/cm–1 | ID/IF2gb | exposed planesc | TRd/°C | H2 con.e/μmolH2 g–1 | H2 con.e/μmolH2 m–2 |
|---|---|---|---|---|---|---|---|
| Ce–C | 463 | 14.32 | 0.03 | (100) | 519 | 81 | 3.5 |
| Ce–R | 461 | 37.72 | 0.07 | (110),(100) | 491 | 685 | 8.1 |
| Ce–P | 462 | 16.26 | 0.002 | (111),(100) | 416, 523 | 572 | 8.4 |
a
Calculated from Raman analysis.
b
The area ratios of the D and F2g band from Raman spectroscopy.
c
Identified by TEM.
d
The maximum of the low-temperature reduction peak.
e
H2 consumption calculated from the low-temperature TPR peak (T < 620 °C).