Tuning the structural, optoelectronic, mechanical, and hydrogen storage properties of metal hydride RbGeCl <sub>3</sub> : DFT insight
Bibliographic record
Abstract
This work analyzed the impact of hydrogenation on the structural, mechanical, optoelectronic, and hydrogen storage properties of cubic RbGeCl 3 using density functional theory with the generalized gradient approximation PBE functional. As hydrogen is incorporated, the pristine direct band gap of 1.02 eV is systematically reduced, resulting in the material transitioning from an indirect band gap to a metallic one. Based on the negative formation energies, hydrogenated systems are stable and potentially synthesizable. The mechanical properties, including bulk modulus, shear modulus, and Young’s modulus, exhibited nonlinear behaviour with increasing hydrogen concentration. A nonlinear variation in mechanical properties is observed, with optimal performance at x = 0.6. Hydrogen storage parameters, such as gravimetric capacity and desorption temperature, are calculated to assess the material’s likelihood for hydrogen storage applications. The value of gravimetric capacity (0.89 cw%) with lower desorption temperature suggests that RbGeCl 1.2 H 1.8 is a suitable candidate for solid-state hydrogen storage applications. As a whole, RbGeCl 3- x H x exhibits tunable multifunctional properties that are suitable for applications in the advanced energy and electronic sectors.
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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 | 0.000 | 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 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".