Multivalent Manganese Hydrazide Gels for Kubas-Type Hydrogen Storage
Bibliographic record
Abstract
Manganese(II) hydrazide gels designed for Kubas-type hydrogen storage were synthesized from the reaction between bis(trimethylsilylmethyl) manganese and anhydrous hydrazine. The synthetic materials were characterized by X-ray powder diffraction, nitrogen adsorption, X-ray photoelectron spectroscopy, infrared spectroscopy, and elemental analysis. Hydrogen storage measurements were conducted on materials with hydrazine:Mn ratios of 0.5:1, 1:1. 1.5:1, and 2:1. The best results were obtained with the 1:1 material, which demonstrated as high as 1.01 wt % and 32 kg/m 3 at 77 K and 85 bar and 1.06 wt % and 24.2 kg/m 3 at 298 K at 85 bar. Measurements up to 143 bar at 298 K led to an adsorption value of 1.65 wt % and 37.7 kg/m 3 without saturation. The isosteric enthalpy of this material rose with surface coverage from 1.3 to 39 kJ/mol. Excess void space was removed from the materials by compressing at 500 Psi and the resulting compressed gel pellets possess an absolute volumetric adsorption of 18.97 kg/m 3 at 298 K and 85 bar. The mechanism of hydrogen storage was probed with electron paramagnetic resonance (EPR), which showed signal enhancements when sample was held under 1 bar hydrogen, both at room temperature and at 77 K. This was interpreted as a perturbation due to hydrogen binding to the Mn center.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.005 | 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".