In-Situ Measurement of Oxygen Partial Pressure in the Cathode Flow Field with a Hydrophilic Surface
Bibliographic record
Abstract
Cathode oxygen concentration is vital for the performance of proton exchange membrane fuel cells (PEMFC). A novel method to directly detect oxygen partial pressure in the cathode flowfield has been developed utilizing fluorophore molecules which are sensitive to oxygen quenching. A platinum porphyrin based fluorophore is used with a polymer binder to form the fluorophore layer that is exposed to the cathode gas flow field in the visualization cell. In this study, poly-heptafluoro-n-butly, methacrylate-co-hexafluroisopropyl, and methacrylate (FIB polymer) were used as the binder to obtain a proper range of quenching rate. Thus, the intensity of fluorescent luminescence of this fluorophore layer covers 7 kPa to 53 kPa oxygen partial pressure concentration. Also, this material composition exhibits acceptable temperature sensitivity between 40 to 90 degrees C. The polymer binder modification described in this report enabled accurate in-situ oxygen partial pressure measurements to cover typical operating conditions of an automotive PEMFC.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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) | 0.000 | 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".