Ammonia Electrooxidation on NiPd Nanoparticles in Alkaline Media: Effect of pH and Concentration
Why this work is in the frame
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Bibliographic record
Abstract
Ammonia electrooxidation on NiPd nanoparticles with 99:1 nominal atomic composition is investigated in NaNO3 at different pH and NH4NO3 concentrations. As-prepared NiPd has very low to no activity towards this reaction, whereas the catalytic activity of NiPd can be significantly improved by building up a layer of Ni(OH)2 by continuous cycling in NaNO3 at pH 9 in -0.95 to +1.35 V vs. HgO/Hg. Cyclic voltammetry shows that ammonia oxidation on Ni(OH)2/NiPd occurs around 1.28 V vs. HgO/Hg and is highly pH-dependent. Direct and indirect electron transfer mechanisms are discussed: at low ammonia concentration (< 100 mM) the direct electron transfer takes place, whereas indirect electron transfer mechanism is believed to occur at higher concentrations. The stability of the electrooxidation reaction is evaluated by chronoamperometry. 12-hours electrolysis at 10 mA.cm-2 showed 22 % of initial ammonia is mainly transformed into nitrogen, with traces of NO2 (1.6 %) and NO3 (0.9 %).
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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