Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 35, Pages 15212-15217Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp104814u
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Funding
- Helmholtz Initiative
- Swiss National Science Foundation
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The decomposition pathway in LiBH4-MgH2 reactive hydride composites was investigated systematically as a function of pressure and temperature. Individual decomposition of MgH2 and LiBH4 is observed at higher temperatures and low pressures (T >= 450 degrees C and p(H-2) <= 3 bar), whereas simultaneous desorption of H-2 from LiBH4 and formation of MgB2 was observed at 400 degrees C and a hydrogen backpressure of p(H-2) = 5 bar. The simultaneous desorption of H-2 from LiBH4 and MgH2 without intermediate formation of metallic Mg could not be observed. In situ X-ray diffraction (XRD) and infrared (IR) spectroscopy reveal the present crystalline and amorphous phases.
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