Table 4. TPD Measurements of Acid–Base Properties for Morphologically Controlled Ceria.
morphology | CO2 desorbeda/μmol g–12 | CO2 desorbeda/μmol m–2 | NH3 desorbedb/μmol g–1 | NH3 desorbedb/μmol m–2 | basicity/acidity ratio |
---|---|---|---|---|---|
Ce–C | 95 | 4.1 | 13 | 0.56 | 7.3 |
Ce–R | 138 | 1.6 | 23 | 0.27 | 6.0 |
Ce–P | 100 | 1.7 | 15 | 0.26 | 6.5 |
Calculated from CO2 TPD.
Calculated from NH3 TPD.