Open Access
Table 1
Initial gas compositions in our experiments in bar.
| Species | Gas mixture | |||
|---|---|---|---|---|
| Pure N2 | N2−H2 | + low CO2 | + high CO2 | |
| 120 min experiments (wet) | ||||
| N2 | 0.99 ± 0.00 | 0.98 ± 0.00 | 0.98 ± 0.00 | 0.93 ± 0.01 |
| H2 | 0.00 ± 0.00 | (9.98 ± 0.01) × 10−3 | (9.98 ± 0.01) × 10−3 | (9.3 ± 0.1) × 10−3 |
| CO2 | (2.6 ± 0.9) × 10−5 | (1.1 ± 0.1) × 10−4 | (2.5 ± 0.1) × 10−3 | (4.6 ± 0.6) × 10−2 |
| O2 | (1.3 ± 0.4) × 10−4 | (8 ± 1) × 10−5 | (1.2 ± 0.2) × 10−4 | (1.3 ± 0.3) × 10−4 |
| H2O | (1.1 ± 0.1) × 10−2 | (1.4 ± 0.1) × 10−2 | (1.0 ± 0.1) × 10−2 | (1.21 ± 0.03) × 10−2 |
| 120 min experiments (dry) | ||||
| N2 | 0.99 ± 0.00 | 0.99 ± 0.00 | 0.98 ± 0.01 | 0.94 ± 0.01 |
| H2 | 0.00 ± 0.00 | (9.85 ± 0.02) × 10−3 | (9.77 ± 0.03) × 10−3 | (9.37 ± 0.04) × 10−3 |
| CO2 | (2 ± 1) × 10−6 | (2 ± 2) × 10−5 | (6 ± 2) × 10−3 | (4.7 ± 0.5) × 10−2 |
| O2 | (6 ± 2) × 10−5 | (1.4 ± 0.3) × 10−4 | (5 ± 3) × 10−4 | (2.6 ± 0.1) × 10−4 |
| H2O | (6 ± 3) × 10−3 | (4 ± 2) × 10−3 | (6 ± 2) × 10−3 | (6 ± 2) × 10−3 |
| Overnight experiments (wet) | ||||
| N2 | 0.99 ± 0.00 | 0.97 ± 0.00 | 0.97 ± 0.00 | 0.94 ± 0.01 |
| H2 | 0.00 ± 0.00 | (9.74 ± 0.01) × 10−3 | (9.71 ± 0.02) × 10−3 | (9.4 ± 0.1) × 10−3 |
| CO2 | (1.1 ± 0.1) × 10−5 | (4 ± 3) × 10−5 | (4 ± 1) × 10−3 | (3.8 ± 0.5) × 10−2 |
| O2 | (9 ± 3) × 10−5 | (5 ± 1) × 10−5 | (2.5 ± 1.2) × 10−4 | (1.4 ± 0.4) × 10−4 |
| H2O | (1.0 ± 0.5) × 10−2 | (1.6 ± 0.1) × 10−2 | (1.5 ± 0.2) × 10−2 | (1.8 ± 0.1) × 10−2 |
![$\[(\sigma / \sqrt{N}).\]$](/articles/aa/full_html/2024/06/aa47286-23/aa47286-23-eq4.png){kind=small}
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