Table 1 Comparative data for CoPc1@MWCNTs and CoPc2@MWCNTs catalytic materials during a 1 h electrolysis as a function of the potential in CO2-saturated aqueous solution containing 0.5 M NaHCO3 (pH 7.3)
From: CO2 electrochemical catalytic reduction with a highly active cobalt phthalocyanine
E (V vs. RHE) | Entry | overpotential (mV)a | Catalystb | jCO (mA cm−2)c | TOF (CO, s−1)c | Selectivity (CO, ±0.5%) |
---|---|---|---|---|---|---|
−0.676 | 1 | 546 | CoPc1 | 13.10 ± 0.79 | 4.08 ± 0.25 | 92 |
2 | 539 | CoPc2 | 18.10 ± 0.80 | 6.81 ± 0.30 | 93 | |
−0.626 | 3 | 502 | CoPc1 | 9.61 ± 0.51 | 2.97 ± 0.16 | 92 |
4 | 498 | CoPc2 | 12.3 ± 0.34 | 4.46 ± 0.12 | 92 | |
−0.576 | 5 | 458 | CoPc1 | 5.57 ± 0.21 | 1.63 ± 0.06 | 86 |
6 | 454 | CoPc2 | 7.75 ± 0.16 | 2.75 ± 0.06 | 84 | |
−0.526 | 7 | 411 | CoPc1 | 3.10 ± 0.07 | 0.87 ± 0.02 | 80 |
8 | 410 | CoPc2 | 4.33 ± 0.08 | 1.57 ± 0.03 | 73 | |
−0.476 | 9 | 364 | CoPc1 | 1.62 ± 0.01 | 0.44 ± 0.01 | 76 |
10 | 363 | CoPc2 | 2.09 ± 0.04 | 0.74 ± 0.01 | 65 |