2010
DOI: 10.1039/b923829h
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Li2B12H12·7NH3: a new ammine complex for ammonia storage or indirect hydrogen storage

Abstract: A new ammine complex, Li2B12H12$7NH3, that can reversibly release all the NH3 at below 200oC and reabsorb NH3 at room temperature and 0.5 bar was synthesized and investigated for reversible ammonia storage or indirect hydrogen storage.

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Cited by 41 publications
(24 citation statements)
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“…As shown in Figure S8, THF can vaporizes completely in the 20-min holding at room temperature because its boiling temperature is 66 C. However, when THF is used as a solvent to dissolve LiBH 4 , evaporation of THF becomes much slower. Nevertheless, our previous study [34] has shown that the THF residual in the LiBH 4 /THF powder could be removed completely under a vacuum of 10 À4 MPa at room temperature for 36 h. Finally, the characteristic BeH stretching vibration from Li 2 B 12 H 12 at 2479 cm À1 [34,53] is not noticeable (Fig. 8).…”
Section: (B) and (D)mentioning
confidence: 85%
“…As shown in Figure S8, THF can vaporizes completely in the 20-min holding at room temperature because its boiling temperature is 66 C. However, when THF is used as a solvent to dissolve LiBH 4 , evaporation of THF becomes much slower. Nevertheless, our previous study [34] has shown that the THF residual in the LiBH 4 /THF powder could be removed completely under a vacuum of 10 À4 MPa at room temperature for 36 h. Finally, the characteristic BeH stretching vibration from Li 2 B 12 H 12 at 2479 cm À1 [34,53] is not noticeable (Fig. 8).…”
Section: (B) and (D)mentioning
confidence: 85%
“…[24][25][26][27] For heptahydrated and heptaammoniated lithium salts of dodecahydrododecaborate, thermal treatment yields solvent-free Li 2 B 12 H 12 . [35,36] Remarkably, [Li 2 (NH 3 ) 7 B 12 H 12 ] releases and absorbs all its NH 3 reversibly under mild conditions. [36] The [B 12 H 12 ] 2À anion is very stable; it does not react with 3 n hydrochloric acid or aqueous sodium hydroxide even at 95 8C.…”
Section: Attempts To Prepare a Thf Solvated Complexmentioning
confidence: 99%
“…[35,36] Remarkably, [Li 2 (NH 3 ) 7 B 12 H 12 ] releases and absorbs all its NH 3 reversibly under mild conditions. [36] The [B 12 H 12 ] 2À anion is very stable; it does not react with 3 n hydrochloric acid or aqueous sodium hydroxide even at 95 8C. [29] However, in the solid state, hydrolysis, ammonolysis, and methanolysis take place with the molecular hydrogen released under relatively mild conditions.…”
Section: Attempts To Prepare a Thf Solvated Complexmentioning
confidence: 99%
“…Furthermore, the intensity of this absorption peak increases with the number of the release treatment. The B-B absorption from Li 2 B 12 H 12 at 1070 cm -1 [28], however, is not discernable because of its intrinsically low intensity and overlap with the unidentified small peaks at that region. Nevertheless, the appearance of the 2479 cm -1 peak in both R1 and 2(R+S) samples reveals that Li 2 B 12 H 12 can be formed at 265 o C or lower from the nanoscale LiBH 4 powder.…”
Section: Ftir Analysis Of Nanoscale Libhmentioning
confidence: 95%
“…The most interesting phenomenon in dehydrogenation and re-hydrogenation of the nanoscale LiBH 4 at 265 o C is the formation of Li 2 B 12 H 12 because the characteristic B-H stretching vibration from Li 2 B 12 H 12 at 2479 cm -1 [28] is present for both R1 and 2(R+S) samples. Furthermore, the intensity of this absorption peak increases with the number of the release treatment.…”
Section: Ftir Analysis Of Nanoscale Libhmentioning
confidence: 99%