3D Chemical Mapping of PEM Fuel Cell Cathodes by Scanning Transmission Soft X-ray SpectroTomography
Why this work is in the frame
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Bibliographic record
Abstract
Soft X-ray spectrotomography was applied for 3D chemical analysis of fuel cell cathodes at the nano scale. The goal was to obtain 3D maps of the components constituting the catalyst layer, and, in particular, to differentiate 3D networks of carbon support and ionomer. Using scanning transmission soft X-ray microscopy (STXM) with a rotating sample holder we produced a series of images at selected photon energies and different rotational angles of the sample. The rotational image stacks were tomographically reconstructed, while the X-ray absorption fingerprints at the C1s and F1s edges were used to generate 3D maps of the networks of carbon-support/catalyst and the fluorine-rich ionomer.
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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 | 0.000 |
| 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