Electrochemical Reduction of H<sub>2</sub>O and CO<sub>2</sub> Using Anode Supported SDC Cells
Bibliographic record
Abstract
In this contribution, we studied electrochemical reduction of H 2 O and CO 2 at reduced temperatures using anode supported SDC cells. We observed that the SDC cell voltage was 1.16V under electrochemical reduction of H 2 O and 1.17V under electrochemical reduction of CO 2 at 500 o C, 0.5A cm -2 . The cell showed no degradation during a short term (72hr) stability test under the CO 2 electrochemical reduction condition. It was noticed that the SDC cells showed much better cell performance in the electrolysis cell (EC) mode than in the fuel cell (FC) mode in term of polarization. It was also found that the impedance of the SDC cell changed dramatically with applied current. At high applied EC current the cell became more like a pure inductor (or a resistor), i.e., the semicircle representing the electrochemical polarization was decreased, and the electrolyte bulk resistance was also reduced substantially. It implies that the SDC cell under the EC mode becomes more electronically conductive, and the resistance is varied with the applied current. GC analysis of fuel side gas composition revealed that CO 2 conversion rate was low, and almost irrelevant to the applied current. The corresponding faradic efficiency is extremely low, indicating a severe internal shorting problem under the EC tested conditions. Therefore, we conclude that the anode supported SDC electrolyte cell is not feasible for SOEC application even at a reduced temperature.
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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 | 0.001 |
| 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) | 0.000 | 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".