Effects of penta‐coordinated Al<sup>3+</sup> sites and Ni defective sites on Ni/<scp>Al<sub>2</sub>O<sub>3</sub></scp> for <scp>CO</scp> methanation
Bibliographic record
Abstract
Abstract Engineering sophisticated structure of Al2O3 and controlling the structure of counterpart metal active sites remain challenges to achieve a high catalytic‐performance in heterogeneous catalysis. Herein, we present a confinement strategy to stabilize homogeneous Ni by penta‐coordinated Al3+ anchoring sites in Al2O3. This approach is involved in using a metal–organic framework as host to load Ni2+ ions, by the aim of producing a confined Ni/Al2O3 catalyst after a standard calcination. Metal–support interaction between Ni and Al2O3 was tailored to be medium to avoid the formation of inactive NiAl2O4, which favors the generation of more available Ni active sites accessible to the reactants. The resultant Ni/Al2O3 exhibited superior catalytic performance in comparison with the control Ni/Al2O3 in CO methanation owing to the presence of defective sites on sufficient Ni0 surface. Furthermore, the presence of oxygen vacancies on Al2O3 and hydrogen spillover contributed toward excellent coke resistance properties in the reaction.
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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".