Table 1. Reaction conditions for the synthesis of fcc and hcp Ru NPs and their catalytic activities T50 6 (temperature for 50% conversion of CO to CO2).
| Sample | Structure | Size (TEM)/nm | Metal precursor/mmol | Solvent/mL | PVP/mmol | T50 (°C) |
|---|---|---|---|---|---|---|
| 1 | fcc | 2.4 ± 0.5 | Ru(acac)3/2.1 | TEG/500 | 10.0 | 172 |
| 2 | fcc | 3.5 ± 0.7 | Ru(acac)3/2.1 | TEG/200 | 10.0 | 160 |
| 3 | fcc | 3.9 ± 0.8 | Ru(acac)3/2.1 | TEG/100 | 5.0 | 154 |
| 4 | fcc | 5.4 ± 1.1 | Ru(acac)3/2.1 | TEG/25 | 1.0 | 153 |
| 5 | hcp | 2.2 ± 0.5 | RuCl3 · nH2O/2.1 | EG/500 | 10.0 | 162 |
| 6 | hcp | 3.5 ± 0.6 | RuCl3 · nH2O/2.1 | EG/200 | 10.0 | 173 |
| 7 | hcp | 3.9 ± 0.6 | RuCl3 · nH2O/2.1 | EG/100 | 5.0 | 174 |
| 8 | hcp | 5.0 ± 0.7 | RuCl3 · nH2O/2.1 | EG/25 | 1.0 | 173 |
Notably, the fcc Ru NPs were fabricated by chemical reduction methods using Ru(acac)3.