Spin-State Transition Represses the Surface Reconstruction for Efficient Water Oxidation
Why this work is in the frame
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Bibliographic record
Abstract
Spin-state manipulation holds great potential for navigating the reconstructed behavior during the oxygen evolution reaction (OER) due to the modified d–p orbital hybridization. Herein, we proposed a spin-state transition repressed surface reconstruction strategy by fabricating the iridium (Ir)-doped NiCo hydroxide with low spin-state Co sites as an efficient and stable OER catalyst. Ir doping induces spin asymmetry to be broken, alters the Co spin state from e g 2 to e g 0.6, and changes the orbital hybridization of Co(Ni)-O, effectively reducing the oxidation of metal sites in the catalytic reaction due to the alleviated accumulation of OH – on the surface, thus repressing the surface reconstruction. Notably, the stable Ir-NiCo LDH exhibited a low overpotential (245 mV at 10 mA cm –2 ) and steadily operated for over 100 h. The enhanced performance resulted from the introduction of high-active Ir and the up-shifted Co d-band center, which promote the generation of key *OOH intermediates. This work supplies a new platform for the development of effective OER catalysts based on the relationship between the electronic spin-state and surface reconstruction.
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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) | 0.000 | 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) | 0.000 | 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