Table 1. HER Performance of WO3·H2O and WO3 Nanoplates in Different Electrolytes.
| catalysts | electrolyte | overpotential (mV at 10 mA cm–2 vs RHE) | Tafel slope (mV dec–1) | exchange current density (A cm–2) |
|---|---|---|---|---|
| WO3·H2O (1st LSV) | 0.5 M H2SO4 | 147 | 43.9 | 6.11 × 10–3 |
| WO3 (1st LSV) | 0.5 M H2SO4 | 73 | 39.5 | 12.58 × 10–3 |
| WO3·H2O (4001st LSV) | 0.5 M H2SO4 | 66 | 34.8 | 14.2 × 10–3 |
| WO3 (4001st LSV) | 0.5 M H2SO4 | 70 | 38.53 | 12.82 × 10–3 |
| Pt/C | 0.5 M H2SO4 | 24 | 29 | 17.78 × 10–3 |
| WO3·H2O (1st LSV) | distilled water | 55.7 | 0.02 × 10–3 | |
| WO3 (1st LSV) | distilled water | 331 at 1 mA cm–2 | 51.59 | 0.021 × 10–3 |
| WO3·H2O (10001st LSV) | distilled water | 177 at 1 mA cm–2 | 32 | 0.032 × 10–3 |
| WO3 (10001st LSV) | distilled water | 193 at 1 mA cm–2 | 47.73 | 0.052 × 10–3 |