Table 3. Summary of Mono-, Bi- and Trimetallic NP Catalysts for the Direct Synthesis of H2O2 from H2 and O2.
| catalyst | catalyst type (supported) | H2O2 formation rate/molH2O2 h–1 kgcat–1 (H2 selectivity/%)a | rate of overhydrogenation (molH2O2 h–1 kgcat–1) | PRproduct/PRhydrog | ref |
|---|---|---|---|---|---|
| 5%Au/C | MMNP | 1.0 | NDb | – | (212) |
| 2.5%Au–2.5%Pd/C | BMNP | 110 (80) | 28 | 3.92 | |
| 5%Pd/C | MMNP | 55 (34) | 107 | 0.51 | |
| 5%Au/Al2O3 | MMNP | 2.6 | NDb | – | |
| 2.5%Au–2.5%Pd/Al2O3 | BMNP | 15 (14) | 92 | 0.16 | |
| 5%Pd/Al2O3 | MMNP | 9.0 | NDb | – | |
| 5%Au/TiO2 | MMNP | 7.0 | NDb | – | |
| 2.5%Au–2.5%Pd/TiO2 | BMNP | 64 (70) | 27 | 2.37 | |
| 5%Pd/TiO2 | MMNP | 30 (21) | 113 | 0.26 | |
| 2.5%Au–2.5%Pd/TiO2 (1:1.9 mol % Au:Pd) | BMNP | 64 | 235 | 0.27 | (213) |
| 2.5%Au–2.5%Pt/TiO2 (1:1 mol % Au:Pd) | BMNP | 65 | 103 | 0.63 | |
| 2.5%Pd–2.5%Pt/TiO2 (1.9:1 mol % Au:Pd) | BMNP | 124 | 129 | 0.96 | |
| 2.45%Au–2.45%Pd–0.05%Pt/TiO2 (1:1.9:0.025 mol % Au:Pd:Pt) | TMNP | 154 | 135 | 1.14 | |
| 2.45%Au–2.45%Pd–0.1%Pt/TiO2 (1:1.9:0.05 mol % Au:Pd:Pt) | TMNP | 159 | 283 | 0.56 | |
| 2.40%Au–2.40%Pd–0.20%Pt/TiO2 (1:1.9:0.10 mol % Au:Pd:Pt) | TMNP | 156 | 318 | 0.49 | |
| 2.28%Au–2.28%Pd–0.45%Pt/TiO2 (1:1.9:0.20 mol % Au:Pd:Pt) | TMNP | 106 | 263 | 0.40 | |
| 0.20%Au–4.60%Pd–0.20%Pt/TiO2 (1:43:1 mol % Au:Pd:Pt) | TMNP | 184 | 382 | 0.48 | |
| Pd/CeO2 (5 wt % Pd) | MMNP | 97 | 329 | 0.29 | (16) |
| Pt/CeO2 (5 wt % Pt) | MMNP | 8 | 126 | 0.063 | |
| Au/CeO2 (5 wt % Au) | MMNP | 1 | 118 | 0.0084 | |
| Au50Pd50/CeO2 (5 wt % M) | BMNP | 68 | 145 | 0.47 | |
| Au48Pd48Pt4/CeO2 (5 wt % M) | TMNP | 170 | 145 | 1.17 | |
| Au50Pd46Pt4/CeO2 (5 wt % M) | TMNP | 86 | 11 | 7.81 | |
| PdAg/C | BMNP | 70 | 29 | 2.41 | (216) |
a
Reaction conditions: T = 275 K; p = 4 MPa; H2:O2 ratio = 1:2.
b
ND = not determinable at such low yields.