Achieving high performance and durability with ultra-low precious metal nanolayer on porous transport layer for PEMWE application
Why this work is in the frame
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Bibliographic record
Abstract
Green hydrogen produced from polymer electrolyte membrane water electrolysis (PEMWE) provides a promising pathway to decarbonization. However, excessive dependence on Pt and Ir in the catalyst synthesis and anticorrosive coating on porous transport layers (PTL) drives the cost of PEMWE technology . As an alternative to the Pt-coated commercial PTL, sputtered multilayer and co-deposited TaPt coatings with low Pt loading were developed. Ex-situ electrochemical and physical characterizations (potentiostatic and galvanostatic polarization, scanning electron microscopy, interfacial contact resistance (ICR) testing, and x-ray photoelectron spectroscopy), and in-situ PEMWE cell testing was conducted to examine the PTL coating viability. Under the ex-situ PTL electrochemical stability analysis protocol developed in this work, the multilayered TaPt coating exhibited a higher simulated durability (96 h at 2.0 A cm −2 ) and lower ICR (1.9 mΩ cm 2 ) than the existing commercial Pt-coated PTL (15 h simulated durability and 2.1 mΩ cm 2 ). Low compressive stress and low extent of Galvanic coupling led to an improvement in the durability, conductivity, and in-situ performance of the TaPt multilayered PTL coating.
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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 | 0.001 | 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) | 0.000 | 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 it