Nickel Cathode Passivation in Alkaline Water Electrolysis
Why this work is in the frame
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Bibliographic record
Abstract
During water electrolysis in alkaline electrolytes, nickel cathodes deactivate over time. The presence of soluble iron species in the alkaline electrolyte mitigates the deactivation. Congruently, iron deposits are observed on the Ni electrodes. The role of the iron deposits in preventing deactivation is explored in this work. Nickel deactivation has been proposed to be due to the formation of a surface Ni hydride phase. A complete coating of metallic iron is known to prevent nickel electrode deactivation. In industrial electrolysis, however, there is never complete coverage of the Ni electrode by iron deposition. In this work, we focused on determining the extent of iron surface coverage required to prevent nickel deactivation. A metallic grid placed over the nickel electrodes during iron vacuum sputtering was used to achieve iron coverages ranging from 20 to 100%.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it