Engineering <i>d–p</i> Orbital Hybridization in Mo‐O Species of Medium‐Entropy Metal Oxides as Highly Active and Stable Electrocatalysts toward Ampere‐Level Water/Seawater Splitting
Bibliographic record
Abstract
Abstract Optimizing the electronic structure of electrocatalysts is of particular importance to enhance the intrinsic activity of active sites in water/seawater. Herein, a series of medium‐entropy metal oxides of X(NiMo)O 2 /NF (X = Mn, Fe, Co, Cu and Zn) is designed via a rapid carbothermal shocking method. Among them, the optimized medium‐entropy metal oxide (FeNiMo)O 2 /NF delivered remarkable HER performance, where the overpotentials as low as 110 and 141 mV are realized at 1000 mA cm −2 (@60 °C) in water and seawater. Meanwhile, medium‐entropy metal oxide (FeNiMo)O 2 /NF only required overpotentials of as low as 330 and 380 mV to drive 1000 mA cm −2 for OER in water and seawater (@60 °C). Theoretical calculations showed that the multiple‐metal synergistic effect in medium‐entropy metal oxides can effectively enhance the d–p orbital hybridization of Mo─O bond, reduce the energy barrier of H * adsorbed at the Mo sites. Meanwhile, Fe sites in medium‐entropy metal oxide can act as the real OER active center, resulting in a good bifunctional activity. In all, this work provides a feasible strategy for the development of highly active and stable medium‐entropy metal oxide electrocatalysts for ampere‐level water/seawater splitting.
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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 | 0.000 |
| 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 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".