Formation of a Porous Platinum Nanoparticle Froth for Electrochemical Applications, Produced without Templates, Surfactants, or Stabilizers
Bibliographic record
Abstract
Pt nanoparticles (NPs), synthesized via the reduction of H 2 PtCl 6 by formic acid at 80 °C, formed a nanoporous froth at the upper surface of the aqueous solution in which they were produced. The NPs, brought to the surface by the escape of CO 2 bubbles produced by the reduction, partly coalesced to form a froth film with a porosity >95%. Scanning and transmission electron microscopies were used to characterize the froth morphology and the NP dimensions, and X-ray photoelectron spectroscopy was used to characterize the NP surface chemistry. The froth was found to be composed of 3−5 nm zerovalent Pt NPs. The porous froth films, which could be removed and handled, demonstrated an electroactive surface area of 168 ± 8 m 2 /g Pt, more than 4 times that of a commercial colloidal Pt black, and equivalent to that of the best Pt particle/carbon black electrocatalysts.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".