Electrochemical Characterization of the Active Surface in Carbon-Supported Platinum Electrocatalysts for PEM Fuel Cells
Bibliographic record
Abstract
A series of carbon-supported nanosized platinum electrocatalysts for use in proton exchange membrane (PEM) fuel cells have been characterized electrochemically in acid solution. This analysis was performed under galvanostatic conditions, in contrast to the more traditional potentiodynamic methods that generate cyclic voltammograms (CVs). The galvanostatic method used has the advantage of collecting data more efficiently than a typical CV protocol. The resultant differential capacity curves (equivalent to a CV) for the samples analyzed showed that the electrochemical response changed as the platinum loading on a given carbon support increased. In particular, peaks developed in the low potential (hydrogen adsorption/desorption) regions while peaks corresponding to the desorption of oxygen-containing species shifted to higher potentials. A model is proposed to explain this behavior based on changes to the size of the platinum particles. © 2003 The Electrochemical Society. All rights reserved.
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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 | 0.001 |
| 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".