LiBH₄ Electronic Destabilization with Nickel(II) Phthalocyanine—Leading to a Reversible Hydrogen Storage System

Abstract

Precipitation of a LiBH 4 solution into an antisolvent led to formation of nanoparticles in the size range of 2 to 18 nm. By direct deposition of these nanoparticles onto a nickel(II) phthalocyanine substrate, LiBH 4 was destabilized and the hydrogen release temperature was dramatically reduced to 350 °C through a single step decomposition. Remarkably, upon hydrogen release and uptakes, the morphology of the material evolved to single crystal "plates"-like particles and a reversible hydrogen storage capacity of 3.2 mass% at 350 °C under 6 MPa H 2 pressure was observed. As evident by X-ray photoelectron spectroscopy analysis, such an enhancement is believed to result from the effective electron transfer interplay between LiBH 4 , LiH, B, and the nickel(II) phthalocyanine, enabling a destabilization of LiBH 4 and the facile rehydrogenation of LiH and B into LiBH 4 . This study thus reveals a novel approach to destabilize LiBH 4 by the use of an "electron active" substrate.

Synergistic Effect of CeF3 Nanoparticles Supported on Ti3C2 MXene for Catalyzing Hydrogen Storage of NaAlH4

“…The energy crisis and environmental problems require us to develop new energy sources to reduce the dependence on fossil fuels. − Hydrogen, as an excellent green energy carrier, has attracted wide attention because of its clean, nonpolluting, safety, sustainability, environmental friendly, and high energy density properties. − Unfortunately, the storage of hydrogen is one of the stumbling blocks to its practical applications. − The search for suitable hydrogen storage technology is the key to realize the conversion to a hydrogen economy from fossil fuels . Tremendous attempts have been made to develop efficient, safe, and economical hydrogen storage technologies. − Solid-state hydrogen storage systems have been widely studied due to their high hydrogen storage capacity, safety, and reversibility. − In particular, NaAlH 4 has been considered to be one of the most promising hydrogen storage materials with high gravimetric and volumetric hydrogen densities as well as mild operating temperature and pressure .…”

Core–Shell NaBH4@Na2B12H12 Nanoparticles as Fast Ionic Conductors for Sodium-Ion Batteries

“…The presence of Na 2 B 12 H 12 is identified by the peaks at 2486 and 717 cm −1 . 51,52 The presence of OH vibrations at around 3200, 3600, and 1614 cm −1 is due to the hygroscopic nature of Na 2 B 12 H 12 and NaBH 4 . 53−55 Compared to NaBH 4 , NaBH 4 @ Na 2 BH 12 H 12 clearly shows new vibrations related to the formation of Na 2 B 12 H 12 .…”

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“…The second step included the preparation of (Ni-Pc) by using 4 g of [o-Cyanobenzamide] from the first step, 1 g of powdered nickel, and 2.5 g of naphthalene (as diluent) were stirred heating up to 230 °C for one hour [13]. Finally, 100 ml of acetone boiled for 5 min and the final powder product was treated by 1 M of sodium hydroxide diluted in hot water to remove the extra naphthalene [14,15]. The residue was recrystallized from benzene.…”