Role of Active Site and CO<sub>2</sub>‐Interacting Surface Species in Dry Reforming of Methane over Strontium Promoted Ni Catalyst Supported by Lanthanum‐Zirconia
Why this work is in the frame
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Bibliographic record
Abstract
Abstract In the context of global warming, the dry reforming of methane (DRM) has gained significant attention due to its ability to simultaneously deplete two greenhouse gases, i. e. CH 4 and CO 2 , and generate syngas. Herein, strontium‐promoted Lanthanum‐zirconia supported Ni catalysts are investigated for DRM and characterized by X‐ray diffraction, surface area and porosity, FTIR‐RAMAN spectroscopy, and temperature‐programmed experiments. The Ni/LaZr catalyst contains formate and oxycarbonate‐like CO 2 ‐interacting species, while strontium‐promoted catalysts have additional ionic CO 3 2− species. The current catalyst system of 2 % strontium‐promoted Ni/LaZr has active sites derived from three types of NiO: easily reducible, moderately interacted, and strongly interacted. During the DRM reaction over the current system, CO 2 is a better oxidant than O 2 for removing carbon deposits. Additionally, the catalysts attain higher reducibility under oxidizing gas (CO 2 ) and reducing gas (H 2 ) during the DRM reaction. For optimal hydrogen yield of approximately 60 % within 420 minutes of operation over Ni2Sr/LaZr catalyst, a balance between the population of active site Ni and CO 2 ‐interacting surface species is necessary.
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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 | 0.001 | 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 | 0.001 |
| 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