Table 2.
Specific surface area/pore size distribution of fresh catalysts and catalyst/ZrO2 sol mixtures using BET nitrogen isotherms and crystalline size of copper species.
| Catalyst | SBET a± 2 | Vtb ± 0.005 | Pore size distribution | Crystalline size | |
|---|---|---|---|---|---|
| (m2 g−1) | (cm3 g−1) | Vmicroc (%) | Vmesod (%) | Cu(111) (nm) ± 0.2 | |
| Fresh catalyst | 62 | 0.080 | 0.025 (30) | 0.059 (70) | 8.7 |
| Catalyst/ZrO2 sol mixture | 108 | 0.160 | 0.017 (10) | 0.145 (90) | 8.1 |
a SBET: specific surface area calculated using BET equation; b Vt: total pore volume estimated at a relative pressure of 0.98; c Vmicro: micorpore volume determined using the Dubinin-Radushkevish equation; d Vmeso: mesopore volume determined by the subtraction of micropore volume from total pore volume.