| Title: | LOW TEMPERATURE TRANSMISSION IR SPECTRA OF SODIUM AND LITHIUM BOROHYDRIDE |
| DOI No: | 10.1142/9789812838025_0012 |
| Source: | MATERIALS ISSUES IN A HYDROGEN ECONOMY (pp 130-137)
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| Author(s): | PANCHATAPA JASH
Department of Chemistry, University Illinois at Chicago, 845 W Taylor Street, Chicago, IL 60607, USA
MICHAEL TRENARY
Department of Chemistry, University Illinois at Chicago, 845 W Taylor Street, Chicago, IL 60607, USA
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| Abstract: | Metal borohydrides of the general formula M(BH4)x are attractive materials for use in the storage of hydrogen. In order to realize the potential of these compounds for such applications, more information is needed on the temperature-dependent hydrogen-loss mechanism. We have constructed a new apparatus that permits infrared spectra to be obtained on hydrogen storage materials over a wide range of temperatures and we demonstrate the capabilities of this method with spectra of LiBH4 and NaBH4 at room temperature and at 148 K. These compounds yield similar IR spectra and for NaBH4 strong IR absorption peaks are observed at room temperature in the B-H stretch region at 2224, 2295, and 2385 cm-1 and in the BH-4 deformation region at 1127 cm-1. Cooling the sample leads to a sharpening of all of the peaks, which allows new features to be resolved that were not observable at room temperature. |
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