Titanium Hydride Nanoplates Enable 5 wt% of Reversible Hydrogen Storage by Sodium Alanate below 80°C.

Sodium alanate (NaAlH) with 5.6 wt% of hydrogen capacity suffers seriously from the sluggish kinetics for reversible hydrogen storage. Ti-based dopants such as TiCl, TiCl, TiF, and TiO are prominent in enhancing the dehydrogenation kinetics and hence reducing the operation temperature.

Amorphous-Carbon-Supported Ultrasmall TiB Nanoparticles With High Catalytic Activity for Reversible Hydrogen Storage in NaAlH.

In this paper, we report amorphous-carbon-supported TiB nanoparticles having sizes of 2-4 nm (nano-TiB@C) as highly active catalysts for hydrogen storage in NaAlH. Nano-TiB@C was synthesized by a simple calcination at 550°C with CpTiCl and MgB (molar ratio of 1:1) as precursors. The addition of 7 wt% nano-TiB@C reduced the onset dehydrogenation temperature of NaAlH by 100 to 75°C.

Nanosheet-like Lithium Borohydride Hydrate with 10 wt % Hydrogen Release at 70 °C as a Chemical Hydrogen Storage Candidate.

A nanosheet-like lithium borohydride hydrate (LiBH·HO) measuring 20-30 nm in thickness is successfully synthesized for the first time by a facile, scalable freeze-drying strategy. The prepared LiBH·HO nanosheets start releasing hydrogen below 50 °C and release an amount up to approximately 10 wt % at 70 °C because of the strong affinity of H in the HO ligand and H in the BH group. The reported dehydrogenation properties here are superior to those of all known complex hydrides, indicating applicability as an advanced chemical hydrogen storage medium.

Facile Synthesis and Superior Catalytic Activity of Nano-TiN@N-C for Hydrogen Storage in NaAlH.

Herein, we synthesize successfully ultrafine TiN nanoparticles (<3 nm in size) embedded in N-doped carbon nanorods (nano-TiN@N-C) by a facile one-step calcination process. The prepared nano-TiN@N-C exhibits superior catalytic activity for hydrogen storage in NaAlH. Adding 7 wt % nano-TiN@N-C induces more than 100 °C reduction in the onset dehydrogenation temperature of NaAlH.