The Role of Dissolved Hydrogen on Rare Earth–Doped Uranium Dioxide Corrosion in the Presence of Hydrogen Peroxide
Bibliographic record
Abstract
Electrochemical and X-ray photoelectron spectroscopic (XPS) methods have been used to study the combined influence of H2O2 and H2 on the oxidation of SIMFUEL (UO2) electrodes in 0.1 mol·dm−3 KCl (pH = 9.5) at 60°C. The SIMFUEL electrodes contain REIII (rare earth) ions at UIV lattice sites within the UO2 matrix. In both Ar-purged and H2/Ar-purged solutions the final corrosion potential values were dependent on [H2O2]; however, the XPS analyses showed no differences in the degree of oxidation of uranium, indicating no enduring effect of H2 on the oxidation of UO2 in H2O2– containing solutions. However, in H2/Ar-purged solutions the corrosion potential achieves considerably more positive transient values than in Ar-purged solutions before relaxing to the final value. A possible reason is that the UIV ⇄ UVI redox cycle induced by hydrogen peroxide oxidation and hydrogen reduction activates the UO2 surface, leading to a temporary enhancement of UO2 dissolution (as UO22+).
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".