Chromium Oxynitride Electrocatalysts for Electrochemical Synthesis of Ammonia Under Ambient Conditions
Why this work is in the frame
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Bibliographic record
Abstract
Abstract The electrochemical synthesis of ammonia via nitrogen reduction reaction (NRR) has received much attention as a more environmentally friendly and less energy consuming technology than the conventional Haber–Bosch process. The catalytic activities of all NRR electrocatalysts reported so far, however, are very low under ambient conditions. In this study, partially oxidized chromium nitride (chromium oxynitride) nanoparticles are synthesized and their NRR activities are evaluated in a proton exchange membrane electrolyzer under ambient conditions. The highest ammonia formation rate of 8.9 × 10 −11 mol s −1 cm −2 and 15.56 µg h −1 mg −1 cat are achieved at a cell voltage of 2.0 V. The highest Faradaic efficiency of 6.7% is achieved at a cell voltage of 1.8 V. The findings demonstrate that metal nitride–based materials can be promising electrocatalysts toward NRR and could guide rational design of more advanced catalysts for various reactions.
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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 | 0.001 | 0.001 |
| 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