Investigating Crystal Structure through Fe-Doping in Bimetallic Oxide Materials and Examining Catalytic Activity
Bibliographic record
Abstract
Controlled Fe substitution through the Solid State Synthesis (argon condition) at the B site in the BaMn 1 x FeₓO 3 δ metal oxide system leads to significant improvements in the electrocatalytic activities for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). When the iron content goes up, the crystal structure changes from hexagonal polytypes (4H BaMnO 3 δ , 10H BaMn 1/2 Fe 1/2 O 3 δ , and 10H BaMn 1/3 Fe 2/3 O 3 δ ) to a monoclinic perovskite type structure in BaFeO 3 δ . This change in structure is accompanied by a significant improvement in electrochemical performance. Compared to Mn rich compositions, BaFeO 3 δ has much lower overpotentials, less charge transfer resistance, higher current densities, and faster reaction kinetics. The results show how important it is to change th e amount of Fe in order to change the electronic structure and catalytic activity of perovskite oxides that are common on Earth. This study demonstrates that the world's second most abundant and cheapest metal, Fe induced structural reorganization, is a vi able approach for the development of high performance catalysts for water splitting, especially in the hexagonal structural framework, which is less investigated.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| 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".