Cerium: an unlikely replacement of dysprosium in high performance Nd-Fe-B permanent magnets.

Replacement of Dy and substitution of Nd in NdFeB-based permanent magnets by Ce, the most abundant and lowest cost rare earth element, is important because Dy and Nd are costly and critical rare earth elements. The Ce, Co co-doped alloys have excellent high-temperature magnetic properties with an intrinsic coercivity being the highest known for T ≥ 453 K.

Sodium magnesium amidoborane: the first mixed-metal amidoborane.

The first example of a mixed-metal amidoborane Na(2)Mg(NH(2)BH(3))(4) has been successfully synthesized. It forms an ordered arrangement in cation coordinations, i.e.

The kinetic enhancement of hydrogen cycling in NaAlH(4) by melt infusion into nanoporous carbon aerogel.

Enhanced kinetic performance and reversibility have been achieved with uncatalyzed NaAlH4 by incorporation into nanoporous carbon aerogel. Aerogel with a pore size distribution peaked at 13 nm and a pore volume of 0.8 cm(3) g(-1) was filled with NaAlH4 to 94% capacity by melt infusion at 189 degrees C under 183 bar H(2) gas overpressure.

Size effects on the hydrogen storage properties of nanoscaffolded Li3BN2H8.

The use of Li3BN2H8 complex hydride as a practical hydrogen storage material is limited by its high desorption temperature and poor reversibility. While certain catalysts have been shown to decrease the dehydrogenation temperature, no significant improvement in reversibility has been reported thus far. In this study, we demonstrated that tuning the particle size to the nanometer scale by infiltration into nanoporous carbon scaffolds leads to dramatic improvements in the reversibility of Li3BN2H8.

Hydrogen desorption exceeding ten weight percent from the new quaternary hydride Li3BN2H8.

Mobile applications of hydrogen power have long demanded new solid hydride materials with large hydrogen storage capacities. We report synthesis of a new quaternary hydride having the approximate composition Li(3)BN(2)H(8) with 11.9 wt % theoretical hydrogen capacity.

Improved hydrogen release from LiB0.33N0.67H2.67 with noble metal additions.

The hydrogen release behavior of the quaternary hydride LiB(0.33)N(0.67)H(2.

Hydrogen release from mixtures of lithium borohydride and lithium amide: a phase diagram study.

We recently reported the synthesis of a new quaternary hydride in the lithium-boron-nitrogen-hydrogen quaternary phase diagram with the approximate composition LiB0.33N0.67H2.

On the composition and crystal structure of the new quaternary hydride phase Li4BN3H10.

X-ray data on single crystals of the quaternary metal hydride near the composition LiB(0.33)N(0.67)H(2.