Directing the reactivity of metal hydrides for selective CO <sub>2</sub> reduction
Bibliographic record
Abstract
Significance Electrocatalytic CO 2 reduction to fuels using renewable electricity provides an entry into sustainable carbon-neutral fuels. Most reactions require proton equivalents, but direct proton reduction to H 2 leads to low product selectivity, a significant challenge in the field. The issue of product selectivity arises from shared catalytic intermediates for both CO 2 reduction and H 2 evolution. We describe how thermodynamic relationships regarding the reactivity of H + and CO 2 with one of these shared intermediates, homogeneous metal hydrides, can be applied to identify catalyst candidates and conditions where H 2 evolution is suppressed in favor of highly selective CO 2 reduction. The conceptual framework is used to outline operational conditions for electrocatalytic reduction of CO 2 to formate (HCO 2 − ) by [Pt(dmpe) 2 ](PF 6 ) 2 with negligible H 2 production.
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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 | 0.001 |
| 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".