The role of ammonia in promoting ammonia borane synthesis
作者:P. Veeraraghavan Ramachandran、Ameya S. Kulkarni
DOI:10.1039/c6dt02925f
日期:——
Ammonia promotes the synthesis of pure ammoniaborane (AB) in excellent yields from sodium borohydride and ammonium sulfate in tetrahydrofuran under ambient conditions. An examination of the influence of added ammonia reveals that it is incorporated into the product AB, contrary to its perceived function as a catalyst or a co-solvent. Mechanistic studies point to a nucleophilic attack by ammonia on
Structural Diversity and Trends in Properties of an Array of Hydrogen-Rich Ammonium Metal Borohydrides
作者:Jakob B. Grinderslev、Lars H. Jepsen、Young-Su Lee、Kasper T. Møller、Young Whan Cho、Radovan Černý、Torben R. Jensen
DOI:10.1021/acs.inorgchem.0c01797
日期:2020.9.8
Metalborohydrides are a fascinating and continuously expanding class of materials, showing promising applications within many different fields of research. This study presents 17 derivatives of the hydrogen-rich ammonium borohydride, NH4BH4, which all exhibit high gravimetric hydrogen densities (>9.2 wt % of H2). A detailed insight into the crystal structures combining X-ray diffraction and density
Phosphane-decorated Platinum Nanoparticles as Efficient Catalysts for H<sub>2</sub>
Generation from Ammonia Borane and Methanol
作者:Patricia Lara、Karine Philippot、Andrés Suárez
DOI:10.1002/cctc.201801702
日期:2019.1.23
narrowly dispersed Pt nanoparticles of 1.5–2.2 nm in size stabilized by bulky terphenylphosphane ligands has been synthesized by the organometallic method using [Pt(dba)2] as platinum source. These nanoparticles are highly efficient catalysts for hydrogen generation by methanolysis of ammonia borane (H3N ⋅ BH3), providing notable TOF values of up to 284 min−1 at 30 °C and low catalyst loadings (0.14–0
Ammonia-mediated, large-scale synthesis of ammonia borane
作者:P. Veeraraghavan Ramachandran、Hitesh Mistry、Ameya S. Kulkarni、Pravin D. Gagare
DOI:10.1039/c4dt02467b
日期:——
The presence of NH3 allows a high concentration, ambient temperature synthesis of ammonia borane from sodium borohydride in air using reagent-grade THF.
NH3的存在允许在空气中使用试剂级THF,从氢硼酸钠中以高浓度、常温合成氨硼烷。
Solid Aluminum Borohydrides for Prospective Hydrogen Storage
作者:Iurii Dovgaliuk、Damir A. Safin、Nikolay A. Tumanov、Fabrice Morelle、Adel Moulai、Radovan Černý、Zbigniew Łodziana、Michel Devillers、Yaroslav Filinchuk
DOI:10.1002/cssc.201701629
日期:2017.12.8
solid under ambient conditions, show diverse thermal decomposition behaviors: Al(BH4)3 is released for M=Li+ or Na+, whereas heavier derivatives evolve hydrogen and diborane. NH4[Al(BH4)4], containing both protic and hydridic hydrogen, has the lowest decompositiontemperature of 35 °C and yields Al(BH4)3⋅NHBH and hydrogen. The decompositiontemperatures, correlated with the cations’ ionic potential, show