Structure and physical parameters of different Co-based catalysts.
| Sample | Co loadinga (wt%) | S BET (m2 g−1) | d pore (nm) | Co3O4 particle sizeb (nm) | Cobalt dispersionc | NH3 uptaked mmol g−1 |
|---|---|---|---|---|---|---|
| Co/γ-Al2O3 | 9.0 | 127.7 | 8.4 | 9.1 | 14.1 | 0.31 |
| Co/SBA-15 | 9.2 | 472.5 | 7.8 | 10.5 | 12.2 | 0.06 |
| Co/TiO2 | 9.2 | 31.0 | 37.4 | 14.8 | 8.6 | 0.17 |
| Co/MMT | 8.8 | 80.2 | 7.8 | 15.8 | 8.1 | 0.13 |
| Co/ZrO2 | 9.6 | 38.1 | 8.4 | 19.9 | 6.4 | 0.18 |
a
Determined by ICP.
b
Estimated by Scherrer equation, according to the (311) reflection of Co3O4.
c
Co dispersion is calculated by D = 96/d, where d is the cobalt size determined by the relative molar volume correction: dCo = 0.75dCo3O4.
d
Determined by NH3-TPD.