Abstract
The hydrogen storage properties of LiBH4 ball milled with TiF3 were investigated. It was found that the LiBH 4-TiF3 mixture exhibited significantly improved dehydrogenation properties. For example, the LiBH4-TiF3 (mole ratio: 3:1) sample started to release hydrogen at around 100 °C, and the hydrogen desorption capacity reached 5.0 wt% at 250 °C. Furthermore, the dehydrogenated product can be partially rehydrogenated at 100 atm H2 and 350 °C. X-Ray diffraction (XRD), infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) characterizations revealed that the decreased dehydrogenation conditions in the LiBH4-TiF3 system resulted from an exothermic reaction of 3LiBH4 + TiF3 → 3LiF + TiB2 + B + 6H2, which improved both its thermodynamics and kinetics. As the above reaction is exothermic, the reverse reaction is not feasible, further investigations indicated that the rehydrogenation may be due to the formation of another borohydride. © 2010 The Royal Society of Chemistry.
| Original language | English |
|---|---|
| Pages (from-to) | 465-470 |
| Journal | Energy and Environmental Science |
| Volume | 3 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2010 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.Funding
This work was partially supported by the Hi-Tech Research and Development Program of China (2007AA05Z107), the Shanghai Leading Academic Discipline Project (B113), the Shanghai Pujiang Project (08PJ14014), and the Australian Research Council (ARC) Discovery project (DP0878661).
