Synthesis, Structure and Electrical Properties of Mo‐doped CeO<sub>2</sub>–Materials for SOFCs
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Bibliographic record
Abstract
Abstract In this paper, we report the synthesis, structure and electrical conductivity of Mo‐doped compounds with a nominal chemical formula of Ce 1– x Mo x O 2+δ ( x = 0.05, 0.07, 0.1) (CMO). The formation of fluorite‐like structure with a small amount of Ce 8 Mo 12 O 49 impurity (JCPDS Card No. 31‐0330) was confirmed using a powder X‐ray diffraction (PXRD). The fluoride‐type structure was retained under wet H 2 and CH 4 atmospheres at 700 and 800 °C, while diffraction peaks due to metal Mo were observed in dry H 2 under the same condition. AC impedance measurements showed that the total conductivity increases with increasing Mo content in CMO, and among the investigated samples, Ce 0.9 Mo 0.1 O 2+δ exhibited the highest electrical conductivity with a value of 2.8 × 10 –4 and 5.08 × 10 –2 S cm –1 at 550 °C in air and wet H 2 , respectively. The electrical conductivity was found to be nearly the same, especially at high temperatures, in air, O 2 and N 2 . Chemical compatibility of Ce 0.9 Mo 0.1 O 2+δ with 10 mol‐% Y 2 O 3 stabilised ZrO 2 (YSZ) and Ce 0.9 Gd 0.1 O 1.95 (CGO) oxide ion electrolytes in wet H 2 was evaluated at 800–1,000 °C, using PXRD and EDX analyses. PXRD showed that CMO was found to react with YSZ electrolyte at 1,000 °C. The area specific polarisation resistance (ASPR) of Ce 0.9 Mo 0.1 O 2+δ on YSZ was found to be 8.58 ohm cm 2 at 800 °C in wet H 2 .
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.000 | 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