Photoelectrochemical Hydrogen Evolution: Single-Layer, Conjugated Polymer Films Bearing Surface-Deposited Pt Nanoparticles
Bibliographic record
Abstract
In this report, we examine the origin of photocurrent produced by irradiating single layer poly(3-hexylthiophene) (P3HT) films deposited on ITO-coated glass, in aqueous solutions. The photocurrent is found to be largely due to reduction of trace molecular oxygen, which decreases significantly in the presence of an oxygen scavenger. Residual current, < 1 μA cm−2, is observed in acidic media that may be attributed to proton reduction. The addition of a catalyst to aid proton reduction is achieved through photoelectrochemical deposition of Pt nanoparticles from K2PtCl6. Photocurrents at single layer films in aqueous solution increase significantly and bubble formation is observed on the P3HT film that is confirmed to be hydrogen gas. While the photocurrents produced are smaller than those devices employing sophisticated multilayer architectures, the results hold promise that, with further studies, H2 can be evolved at technologically-simple single layer systems with substantially higher rates.
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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) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".