Comparison of Two New Substituted Iron Phthalocyanines as Electrocatalysts for the Oxygen Reduction and Hydrazine Oxidation Reaction
Bibliographic record
Abstract
In this work, two newly synthesized iron phthalocyanines (FePc's), with de-activating substitutents, iron(II) 2,9,16,23-tetra-tert-butyl-phthalocyanine (FePc(tBu)4), and its' naphthalocyanine derivative, iron(II) 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (FeNpPc(tBu)4), were evaluated as both oxygen (O2) reduction, and hydrazine (N2H4) oxidation electrocatalysts in acidic as well as basic media, respectively. Their UV-Vis spectra were compared, followed by surface wave cyclic voltammograms in a N2 purged acidic electrolyte. Their activities were compared to those of the unsubstituted or baseline FePc using rotating disk electrode (RDE), rotating ring disk electrode (RRDE) and cyclic voltammetry (CV) techniques. The resulting Tafel and Koutecky-Levich analyses confirmed the predicted activities towards both reactions to be FePc > FePc(tBu)4 > FeNpPc(tBu)4. However, a change in the FeNpPc(tBu)4 O2 reduction reaction (ORR) mechanism, as well as its' low activity towards N2H4 oxidation was also observed, demonstrating unexpected electronic and steric effects.
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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 | 0.000 |
| 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".