Table 1. Catalytic Testing Results for PAA-Stabilized AuPd/C Catalysts toward the Direct Synthesis of Hydrogen Peroxide and Its Subsequent Degradation.
| catalyst | acid addition | H2O2 productivitya (molH2O2 kg–1cat h–1) | H2O2 degradationb (molH2O2 kg–1cat h–1) | H2O2 selectivity (%) |
|---|---|---|---|---|
| 1%AuPd/GNP | no | 62 | 55 | 14 |
| 1%AuPd/GNP-H+ | yes | 202 | 460 | 38 |
| 1%AuPd/GNP (H+in situ) | in situ | 40 | 67 | 17 |
| 1%AuPd/KBB | no | 17 | 57 | 2 |
| 1%AuPd/KBB-H+ | yes | 46 | 529 | 25 |
| 1%AuPd/KBB (H+in situ) | in situ | 4 | 8 | 3 |
a
H2O2 direct synthesis reaction conditions: catalyst (0.01 g), H2O (2.9 g), MeOH (5.6 g), 5%H2/CO2 (2.9 MPa), 25% O2/CO2 (1.2 MPa), 0.5 h, 2 °C, 1200 rpm.
b
H2O2 degradation reaction conditions: catalyst (0.01 g), H2O2 (50 wt % 0.68 g), H2O (2.22 g), MeOH (5.6 g), 5% H2/CO2 (2.9 MPa), 0.5 h, 2 °C, 1200 rpm.