Phenylenediamine as a Promising Ligand for Non-Noble Metal ORR Catalysts
Bibliographic record
Abstract
This paper compares the use of o-phenylenediamine (oPDA) and its polymeric counterpart, poly-o-phenylenediamine (PoPDA), as the ligand precursors for the formation of non-precious metal (NPM, Co vs. Fe) cathode catalysts. Rotating ring disk electrode (RRDE) work revealed that high onset potentials (0.92 V vs. RHE) and low %H 2 O 2 yields (0.5 % over a wide potential range of 0.05-0.7 V) can be obtained. The use of PoPDA proved to be a better C-N source than the o-PDA monomer, likely due to the formation of a higher number of active sites or to the improved stability of these active sites on the carbon support during high temperature pyrolysis. In all cases, the Fe-based catalyst is superior to the Co-based one. Also, this study confirms the additional benefits of using acid-leached vs. as-received carbon as the support material.
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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 | 0.000 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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".