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Approximately 6.3 wt.% of hydrogen is released from a LiBH4–0.25TiF4 combination below 150°C. Hydrogen desorption from the LiBH4–0.25TiF4 combination undergoes a quite different reaction process with respect to the LiBH4–0.33TiF3 mixture due to the higher oxidation state of Ti4+ and the lower mean bond cleavage energy of Ti–F bonds in TiF4 . This finding provides a viable approach for significantly decreasing the dehydrogenation temperature of LiBH4 by optimizing the additives with high oxidation valency.
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Liu et al. (2011) studied this question.
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