Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499997 | Scripta Materialia | 2011 | 4 Pages |
Abstract
Density functional theory calculations reveal that the reaction between ammonia borane and lithium hydride is thermodynamically favorable above −46 °C. This reaction takes place during ball milling at 20 °C, but can be suppressed when milling is conducted at liquid nitrogen temperature. Cryomilling for 60 min reduces the reaction temperature from ∼70 °C for unmilled powder to below room temperature, indicating that cryomilling can adjust the onset temperature for releasing hydrogen from solid materials that are thermodynamically unstable but with kinetic barriers.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
William Osborn, Tom Sadowski, Leon L. Shaw,