Correlation of Fuel Cell Anode Electrocatalytic and ex situ Catalytic Activity of Perovskites La<sub>0.75</sub>Sr<sub>0.25</sub>Cr<sub>0.5</sub>X<sub>0.5</sub>O<sub>3−δ</sub> (X = Ti, Mn, Fe, Co)
Why this work is in the frame
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Bibliographic record
Abstract
The performance of a series of perovskite oxides having the mutual chemical formula and structure La 0.75 Sr 0.25 Cr 0.5 X 0.5 O 3−δ (X = Co, Fe, Ti, Mn) as solid oxide fuel cell anode electrocatalysts depends on the nature of the substituent element X. The electrocatalytic activity for methane oxidation in a fuel cell correlates well with ex-situ temperature programmed catalytic conversion of CH 4, X = Co > Mn ∼ Fe > Ti, under temperature programmed reaction conditions in 5% CH 4 /He. The total conductivity of the materials in air decreases X = Co > Fe > Mn > Ti. Within the series of catalysts, the order of maximum fuel cell power density depended on feed: CH 4, X = Fe > Mn > Ti; H 2, X = Fe > Mn > Ti; and 0.5% H 2 S/CH 4, X = Ti > Fe > Mn. The Co-containing catalyst was unstable under reducing conditions. A process is proposed to explain the difference in catalyst order and enhanced activities in H 2 S/CH 4 as fuel compared to CH 4 alone.
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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 | 0.003 | 0.001 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 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 it