Thermally-assisted milling and hydrogenolysis for synthesizing ultrafine MgHwith destabilized thermodynamics.

A novel process has been developed to synthesize MgHnanoparticles by combining ball milling and thermal hydrogenolysis of di--butylmagnesium (CH)Mg, denoted as MgBu. With the aid of mechanical impact, the hydrogenolysis temperature of MgBuin heptane and cyclohexane solution was considerably lowered down to 100 °C, and the MgHnanoparticles with an average particle size of8.9 nm were obtained without scaffolds. The nano-size effect of the MgHnanoparticles causes a notable decrease in the onset dehydrogenation temperature of 225 °C and enthalpy of 69.78 kJ mol · H. This thermally-assisted milling and hydrogenolysis process may also be extended for synthesizing other nanomaterials.