Table 1. Summary of Faradaic Efficiency (FE%) Values of Micro-Bi-180s, Micro-Bi-300s, and Micro-Bi-1800s.a.
| micro-Bi-180s | ||||
|---|---|---|---|---|
| V vs RHE | FE% for formate | FE% for CH4 | FE% for CO | FE% for H2 |
| –0.776 | 93.55 | 0 | 0.72 | 4.5 |
| –0.976 | 92.95 | 0 | 2.82 | 1.85 |
| –1.176 | 82.28 | 0.88 | 2.22 | 16.91 |
| –1.376 | 71.71 | 0.44 | 0.89 | 29.27 |
| micro-Bi-300s | ||||
|---|---|---|---|---|
| V vs RHE | FE% for formate | FE% for CH4 | FE% for CO | FE% for H2 |
| –0.776 | 93.38 | 0 | 2.16 | 6.26 |
| –0.976 | 92.69 | 0.49 | 2.5 | 7.09 |
| –1.176 | 75.77 | 0.97 | 1.395 | 23.465 |
| –1.376 | 49.67 | 0.48 | 0.785 | 52.84 |
| micro-Bi-1800s | ||||
|---|---|---|---|---|
| V vs RHE | FE% for formate | FE% for CH4 | FE% for CO | FE% for H2 |
| –0.776 | 84.07 | 0 | 2.32 | 10.90 |
| –0.976 | 94.46 | 0 | 3.06 | 5.13 |
| –1.176 | 85.48 | 0.64 | 1.96 | 13.65 |
| –1.376 | 61.21 | 0.69 | 1.21 | 38.20 |
a
Summary of Faradaic efficiency (FE%) values for formate, CH4, CO, and H2 with micro-Bi-180s, micro-Bi-300s, and micro-Bi-1800s determined by 30 min of chronoamperometry under a constant CO2 flow at four different potential biases (−0.776, −0.976, −1.176, and −1.376 V vs. RHE)