Sulfur Tolerance of La<sub>0.3</sub>M<sub>0.7</sub>Fe<sub>0.7</sub>Cr<sub>0.3</sub>O<sub>3</sub> <sub>-δ</sub> (M= Sr, Ca) Solid Oxide Fuel Cell Anodes
Bibliographic record
Abstract
Symmetrical full cells, based on La 0.3 M 0.7 Fe 0.7 Cr 0.3 O 3- δ (M = Sr, Ca) perovskite oxide electrodes, were constructed, using a Yttria-stabilized zirconia (YSZ) electrolyte with a Samaria-doped ceria (SDC) buffer layer, and then tested in a range of fuel environments at 800 o C. It is demonstrated that the Ca analog (La 0.3 Ca 0.7 Fe 0.7 Cr 0.3 O 3-δ -LCFCr) is an equally good fuel electrode (anode) and air electrode (cathode) as the Sr member of this family (LSFCr), exhibiting very good electrochemical performance in H 2 , CO and H 2 +CO atmospheres. LCFCr and LSFCr anodes were also evaluated in the presence of 9 ppm H 2 S exposures, showing a small, but reproducible and reversible, decrease in polarization resistance (Rp). Studies at cell polarizations of -100 and -300 mV from the open circuit full cell voltage showed a ca. 2-4 % increase in current density in the presence of 9 ppm H 2 S + 30 % H 2 , with the cell recovering fully when H 2 S was removed.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".